html/edit/011-errors.mu.html


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generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-08-06 03:12:51 +0000
 

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<pre id='vimCodeElement'>
<span class="SalientComment">## handling malformed programs</span>

<span class="muData">container</span> environment [
  recipe-errors:text
]

<span class="Comment"># copy code from recipe editor, persist to disk, load, save any errors</span>
<span class="muRecipe">def!</span> update-recipes env:&amp;:environment, screen:&amp;:screen<span class="muRecipe"> -&gt; </span>errors-found?:bool, env:&amp;:environment, screen:&amp;:screen [
  <span class="Constant">local-scope</span>
  <span class="Constant">load-ingredients</span>
  recipes:&amp;:editor <span class="Special">&lt;-</span> get *env, <span class="Constant">recipes:offset</span>
  in:text <span class="Special">&lt;-</span> editor-contents recipes
  save <span class="Constant">[recipes.mu]</span>, in
  recipe-errors:text <span class="Special">&lt;-</span> reload in
  *env <span class="Special">&lt;-</span> put *env, <span class="Constant">recipe-errors:offset</span>, recipe-errors
  <span class="Comment"># if recipe editor has errors, stop</span>
  <span class="Delimiter">{</span>
    <span class="muControl">break-unless</span> recipe-errors
    update-status screen, <span class="Constant">[errors found     ]</span>, <span class="Constant">1/red</span>
    errors-found? <span class="Special">&lt;-</span> copy <span class="Constant">1/true</span>
    <span class="muControl">return</span>
  <span class="Delimiter">}</span>
  errors-found? <span class="Special">&lt;-</span> copy <span class="Constant">0/false</span>
]

<span class="muRecipe">before</span> <span class="Constant">&lt;render-components-end&gt;</span> [
  trace<span class="Constant"> 11</span>, <span class="Constant">[app]</span>, <span class="Constant">[render status]</span>
  recipe-errors:text <span class="Special">&lt;-</span> get *env, <span class="Constant">recipe-errors:offset</span>
  <span class="Delimiter">{</span>
    <span class="muControl">break-unless</span> recipe-errors
    update-status screen, <span class="Constant">[errors found     ]</span>, <span class="Constant">1/red</span>
  <span class="Delimiter">}</span>
]

<span class="muRecipe">before</span> <span class="Constant">&lt;render-recipe-components-end&gt;</span> [
  <span class="Delimiter">{</span>
    recipe-errors:text <span class="Special">&lt;-</span> get *env, <span class="Constant">recipe-errors:offset</span>
    <span class="muControl">break-unless</span> recipe-errors
    row, screen <span class="Special">&lt;-</span> render-text screen, recipe-errors, left, right, <span class="Constant">1/red</span>, row
  <span class="Delimiter">}</span>
]

<span class="muData">container</span> environment [
  error-index:num  <span class="Comment"># index of first sandbox with an error (or -1 if none)</span>
]

<span class="muRecipe">after</span> <span class="Constant">&lt;programming-environment-initialization&gt;</span> [
  *result <span class="Special">&lt;-</span> put *result, <span class="Constant">error-index:offset</span>,<span class="Constant"> -1</span>
]

<span class="muRecipe">after</span> <span class="Constant">&lt;run-sandboxes-begin&gt;</span> [
  *env <span class="Special">&lt;-</span> put *env, <span class="Constant">error-index:offset</span>,<span class="Constant"> -1</span>
]

<span class="muRecipe">before</span> <span class="Constant">&lt;run-sandboxes-end&gt;</span> [
  <span class="Delimiter">{</span>
    error-index:num <span class="Special">&lt;-</span> get *env, <span class="Constant">error-index:offset</span>
    sandboxes-completed-successfully?:bool <span class="Special">&lt;-</span> equal error-index,<span class="Constant"> -1</span>
    <span class="muControl">break-if</span> sandboxes-completed-successfully?
    errors-found? <span class="Special">&lt;-</span> copy <span class="Constant">1/true</span>
  <span class="Delimiter">}</span>
]

<span class="muRecipe">before</span> <span class="Constant">&lt;render-components-end&gt;</span> [
  <span class="Delimiter">{</span>
    <span class="muControl">break-if</span> recipe-errors
    error-index:num <span class="Special">&lt;-</span> get *env, <span class="Constant">error-index:offset</span>
    sandboxes-completed-successfully?:bool <span class="Special">&lt;-</span> equal error-index,<span class="Constant"> -1</span>
    <span class="muControl">break-if</span> sandboxes-completed-successfully?
    error-index-text:text <span class="Special">&lt;-</span> to-text error-index
    status:text <span class="Special">&lt;-</span> interpolate <span class="Constant">[errors found (_)    ]</span>, error-index-text
    update-status screen, status, <span class="Constant">1/red</span>
  <span class="Delimiter">}</span>
]

<span class="muData">container</span> sandbox [
  errors:text
]

<span class="muRecipe">def!</span> update-sandbox sandbox:&amp;:sandbox, env:&amp;:environment, idx:num<span class="muRecipe"> -&gt; </span>sandbox:&amp;:sandbox, env:&amp;:environment [
  <span class="Constant">local-scope</span>
  <span class="Constant">load-ingredients</span>
  data:text <span class="Special">&lt;-</span> get *sandbox, <span class="Constant">data:offset</span>
  response:text, errors:text, fake-screen:&amp;:screen, trace:text, completed?:bool <span class="Special">&lt;-</span> run-sandboxed data
  *sandbox <span class="Special">&lt;-</span> put *sandbox, <span class="Constant">response:offset</span>, response
  *sandbox <span class="Special">&lt;-</span> put *sandbox, <span class="Constant">errors:offset</span>, errors
  *sandbox <span class="Special">&lt;-</span> put *sandbox, <span class="Constant">screen:offset</span>, fake-screen
  *sandbox <span class="Special">&lt;-</span> put *sandbox, <span class="Constant">trace:offset</span>, trace
  <span class="Delimiter">{</span>
    <span class="muControl">break-if</span> errors
    <span class="muControl">break-if</span> completed?:bool
    errors <span class="Special">&lt;-</span> new <span class="Constant">[took too long!</span>
<span class="Constant">]</span>
    *sandbox <span class="Special">&lt;-</span> put *sandbox, <span class="Constant">errors:offset</span>, errors
  <span class="Delimiter">}</span>
  <span class="Delimiter">{</span>
    <span class="muControl">break-unless</span> errors
    error-index:num <span class="Special">&lt;-</span> get *env, <span class="Constant">error-index:offset</span>
    error-not-set?:bool <span class="Special">&lt;-</span> equal error-index,<span class="Constant"> -1</span>
    <span class="muControl">break-unless</span> error-not-set?
    *env <span class="Special">&lt;-</span> put *env, <span class="Constant">error-index:offset</span>, idx
  <span class="Delimiter">}</span>
]

<span class="Comment"># make sure we render any trace</span>
<span class="muRecipe">after</span> <span class="Constant">&lt;render-sandbox-trace-done&gt;</span> [
  <span class="Delimiter">{</span>
    sandbox-errors:text <span class="Special">&lt;-</span> get *sandbox, <span class="Constant">errors:offset</span>
    <span class="muControl">break-unless</span> sandbox-errors
    *sandbox <span class="Special">&lt;-</span> put *sandbox, <span class="Constant">response-starting-row-on-screen:offset</span>,<span class="Constant"> 0</span>  <span class="Comment"># no response</span>
    row, screen <span class="Special">&lt;-</span> render-text screen, sandbox-errors, left, right, <span class="Constant">1/red</span>, row
    <span class="Comment"># don't try to print anything more for this sandbox</span>
    <span class="muControl">jump</span> <span class="Constant">+render-sandbox-end</span>
  <span class="Delimiter">}</span>
]

<span class="muScenario">scenario</span> run-shows-errors-in-get [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">15/height</span>
  recipes:text <span class="Special">&lt;-</span> new <span class="Constant">[ </span>
<span class="Constant">recipe foo [</span>
<span class="Constant">  get 123:num, foo:offset</span>
<span class="Constant">]</span>]
  env:&amp;:environment <span class="Special">&lt;-</span> new-programming-environment screen, recipes, <span class="Constant">[foo]</span>
  assume-console [
    press F4
  ]
  run [
    event-loop screen, console, env
  ]
  screen-should-contain [
   <span class="Constant"> .  errors found                                                                   run (F4)           .</span>
   <span class="Constant"> .                                                  ╎foo                                              .</span>
   <span class="Constant"> .recipe foo [                                      ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .  get 123:num, foo:offset                         ╎                                                 .</span>
   <span class="Constant"> .]                                                 ╎                                                 .</span>
   <span class="Constant"> .foo: unknown element 'foo' in container 'number'  ╎                                                 .</span>
   <span class="Constant"> .foo: first ingredient of 'get' should be a contai↩╎                                                 .</span>
   <span class="Constant"> .ner, but got '123:num'                            ╎                                                 .</span>
   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎                                                 .</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
  screen-should-contain-in-color <span class="Constant">1/red</span>, [
   <span class="Constant"> .  errors found                                                                                      .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .foo: unknown element 'foo' in container 'number'                                                    .</span>
   <span class="Constant"> .foo: first ingredient of 'get' should be a contai                                                   .</span>
   <span class="Constant"> .ner, but got '123:num'                                                                              .</span>
   <span class="Constant"> .                                                                                                    .</span>
  ]
]

<span class="muScenario">scenario</span> run-updates-status-with-first-erroneous-sandbox [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">15/height</span>
  env:&amp;:environment <span class="Special">&lt;-</span> new-programming-environment screen, <span class="Constant">[]</span>, <span class="Constant">[]</span>
  assume-console [
    left-click<span class="Constant"> 3</span>,<span class="Constant"> 80</span>
    <span class="Comment"># create invalid sandbox 1</span>
    type <span class="Constant">[get foo, x:offset]</span>
    press F4
    <span class="Comment"># create invalid sandbox 0</span>
    type <span class="Constant">[get foo, x:offset]</span>
    press F4
  ]
  run [
    event-loop screen, console, env
  ]
  <span class="Comment"># status line shows that error is in first sandbox</span>
  screen-should-contain [
   <span class="Constant"> .  errors found (0)                                                               run (F4)           .</span>
  ]
]

<span class="muScenario">scenario</span> run-updates-status-with-first-erroneous-sandbox-2 [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">15/height</span>
  env:&amp;:environment <span class="Special">&lt;-</span> new-programming-environment screen, <span class="Constant">[]</span>, <span class="Constant">[]</span>
  assume-console [
    left-click<span class="Constant"> 3</span>,<span class="Constant"> 80</span>
    <span class="Comment"># create invalid sandbox 2</span>
    type <span class="Constant">[get foo, x:offset]</span>
    press F4
    <span class="Comment"># create invalid sandbox 1</span>
    type <span class="Constant">[get foo, x:offset]</span>
    press F4
    <span class="Comment"># create valid sandbox 0</span>
    type <span class="Constant">[add 2, 2]</span>
    press F4
  ]
  run [
    event-loop screen, console, env
  ]
  <span class="Comment"># status line shows that error is in second sandbox</span>
  screen-should-contain [
   <span class="Constant"> .  errors found (1)                                                               run (F4)           .</span>
  ]
]

<span class="muScenario">scenario</span> run-hides-errors-from-past-sandboxes [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">15/height</span>
  env:&amp;:environment <span class="Special">&lt;-</span> new-programming-environment screen, <span class="Constant">[]</span>, <span class="Constant">[get foo, x:offset]</span>  <span class="Comment"># invalid</span>
  assume-console [
    press F4  <span class="Comment"># generate error</span>
  ]
  run [
    event-loop screen, console, env
  ]
  assume-console [
    left-click<span class="Constant"> 3</span>,<span class="Constant"> 58</span>
    press ctrl-k
    type <span class="Constant">[add 2, 2]</span>  <span class="Comment"># valid code</span>
    press F4  <span class="Comment"># update sandbox</span>
  ]
  run [
    event-loop screen, console, env
  ]
  <span class="Comment"># error should disappear</span>
  screen-should-contain [
   <span class="Constant"> .                                                                                 run (F4)           .</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
<span class="Constant">    .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎0   edit          copy            delete         .</span>
   <span class="Constant"> .                                                  ╎add 2, 2                                         .</span>
   <span class="Constant"> .                                                  ╎4                                                .</span>
   <span class="Constant"> .                                                  ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
]

<span class="muScenario">scenario</span> run-updates-errors-for-shape-shifting-recipes [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">15/height</span>
  <span class="Comment"># define a shape-shifting recipe with an error</span>
  recipes:text <span class="Special">&lt;-</span> new <span class="Constant">[recipe foo x:_elem -&gt; z:_elem [</span>
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
<span class="Constant">y:&amp;:num &lt;- copy 0</span>
<span class="Constant">z &lt;- add x, y</span>
<span class="Constant">]</span>]
  env:&amp;:environment <span class="Special">&lt;-</span> new-programming-environment screen, recipes, <span class="Constant">[foo 2]</span>
  assume-console [
    press F4
  ]
  event-loop screen, console, env
  screen-should-contain [
   <span class="Constant"> .  errors found (0)                                                               run (F4)           .</span>
   <span class="Constant"> .recipe foo x:_elem -&gt; z:_elem [                   ╎                                                 .</span>
   <span class="Constant"> .local-scope                                       ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .load-ingredients                                  ╎0   edit          copy            delete         .</span>
   <span class="Constant"> .y:&amp;:num &lt;- copy 0                                 ╎foo 2                                            .</span>
   <span class="Constant"> .z &lt;- add x, y                                     ╎foo_2: 'add' requires number ingredients, but go↩.</span>
   <span class="Constant"> .]                                                 ╎t 'y'                                            .</span>
<span class="Constant">    .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
  <span class="Comment"># now rerun everything</span>
  assume-console [
    press F4
  ]
  run [
    event-loop screen, console, env
  ]
  <span class="Comment"># error should remain unchanged</span>
  screen-should-contain [
   <span class="Constant"> .  errors found (0)                                                               run (F4)           .</span>
   <span class="Constant"> .recipe foo x:_elem -&gt; z:_elem [                   ╎                                                 .</span>
   <span class="Constant"> .local-scope                                       ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .load-ingredients                                  ╎0   edit          copy            delete         .</span>
   <span class="Constant"> .y:&amp;:num &lt;- copy 0                                 ╎foo 2                                            .</span>
   <span class="Constant"> .z &lt;- add x, y                                     ╎foo_3: 'add' requires number ingredients, but go↩.</span>
   <span class="Constant"> .]                                                 ╎t 'y'                                            .</span>
<span class="Constant">    .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
]

<span class="muScenario">scenario</span> run-avoids-spurious-errors-on-reloading-shape-shifting-recipes [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">15/height</span>
  <span class="Comment"># overload a well-known shape-shifting recipe</span>
  recipes:text <span class="Special">&lt;-</span> new <span class="Constant">[recipe length l:&amp;:list:_elem -&gt; n:num [</span>
<span class="Constant">]</span>]
  <span class="Comment"># call code that uses other variants of it, but not it itself</span>
  sandbox:text <span class="Special">&lt;-</span> new <span class="Constant">[x:&amp;:list:num &lt;- copy 0</span>
<span class="Constant">to-text x]</span>
  env:&amp;:environment <span class="Special">&lt;-</span> new-programming-environment screen, recipes, sandbox
  <span class="Comment"># run it once</span>
  assume-console [
    press F4
  ]
  event-loop screen, console, env
  <span class="Comment"># no errors anywhere on screen (can't check anything else, since to-text will return an address)</span>
  screen-should-contain-in-color <span class="Constant">1/red</span>, [
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                &lt;-                                  .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
  ]
  <span class="Comment"># rerun everything</span>
  assume-console [
    press F4
  ]
  run [
    event-loop screen, console, env
  ]
  <span class="Comment"># still no errors</span>
  screen-should-contain-in-color <span class="Constant">1/red</span>, [
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                &lt;-                                  .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
  ]
]

<span class="muScenario">scenario</span> run-shows-missing-type-errors [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">15/height</span>
  recipes:text <span class="Special">&lt;-</span> new <span class="Constant">[ </span>
<span class="Constant">recipe foo [</span>
<span class="Constant">  x &lt;- copy 0</span>
<span class="Constant">]</span>]
  env:&amp;:environment <span class="Special">&lt;-</span> new-programming-environment screen, recipes, <span class="Constant">[foo]</span>
  assume-console [
    press F4
  ]
  run [
    event-loop screen, console, env
  ]
  screen-should-contain [
   <span class="Constant"> .  errors found                                                                   run (F4)           .</span>
   <span class="Constant"> .                                                  ╎foo                                              .</span>
   <span class="Constant"> .recipe foo [                                      ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .  x &lt;- copy 0                                     ╎                                                 .</span>
   <span class="Constant"> .]                                                 ╎                                                 .</span>
   <span class="Constant"> .foo: missing type for 'x' in 'x &lt;- copy 0'        ╎                                                 .</span>
  ]
]

<span class="muScenario">scenario</span> run-shows-unbalanced-bracket-errors [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">15/height</span>
  <span class="Comment"># recipe is incomplete (unbalanced '[')</span>
  recipes:text <span class="Special">&lt;-</span> new <span class="Constant">[ </span>
<span class="Constant">recipe foo \\[</span>
<span class="Constant">  x &lt;- copy 0</span>
<span class="Constant">]</span>
  env:&amp;:environment <span class="Special">&lt;-</span> new-programming-environment screen, recipes, <span class="Constant">[foo]</span>
  assume-console [
    press F4
  ]
  run [
    event-loop screen, console, env
  ]
  screen-should-contain [
   <span class="Constant"> .  errors found                                                                   run (F4)           .</span>
   <span class="Constant"> .                                                  ╎foo                                              .</span>
   <span class="Constant"> .recipe foo \\[                                      ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .  x &lt;- copy 0                                     ╎                                                 .</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
   <span class="Constant"> .9: unbalanced '\\[' for recipe                      ╎                                                 .</span>
   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎                                                 .</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
]

<span class="muScenario">scenario</span> run-shows-get-on-non-container-errors [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">15/height</span>
  recipes:text <span class="Special">&lt;-</span> new <span class="Constant">[ </span>
<span class="Constant">recipe foo [</span>
<span class="Constant">  local-scope</span>
<span class="Constant">  x:&amp;:point &lt;- new point:type</span>
<span class="Constant">  get x:&amp;:point, 1:offset</span>
<span class="Constant">]</span>]
  env:&amp;:environment <span class="Special">&lt;-</span> new-programming-environment screen, recipes, <span class="Constant">[foo]</span>
  assume-console [
    press F4
  ]
  run [
    event-loop screen, console, env
  ]
  screen-should-contain [
   <span class="Constant"> .  errors found                                                                   run (F4)           .</span>
   <span class="Constant"> .                                                  ╎foo                                              .</span>
   <span class="Constant"> .recipe foo [                                      ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .  local-scope                                     ╎                                                 .</span>
   <span class="Constant"> .  x:&amp;:point &lt;- new point:type                     ╎                                                 .</span>
   <span class="Constant"> .  get x:&amp;:point, 1:offset                         ╎                                                 .</span>
   <span class="Constant"> .]                                                 ╎                                                 .</span>
   <span class="Constant"> .foo: first ingredient of 'get' should be a contai↩╎                                                 .</span>
   <span class="Constant"> .ner, but got 'x:&amp;:point'                          ╎                                                 .</span>
   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎                                                 .</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
]

<span class="muScenario">scenario</span> run-shows-non-literal-get-argument-errors [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">15/height</span>
  recipes:text <span class="Special">&lt;-</span> new <span class="Constant">[ </span>
<span class="Constant">recipe foo [</span>
<span class="Constant">  local-scope</span>
<span class="Constant">  x:num &lt;- copy 0</span>
<span class="Constant">  y:&amp;:point &lt;- new point:type</span>
<span class="Constant">  get *y:&amp;:point, x:num</span>
<span class="Constant">]</span>]
  env:&amp;:environment <span class="Special">&lt;-</span> new-programming-environment screen, recipes, <span class="Constant">[foo]</span>
  assume-console [
    press F4
  ]
  run [
    event-loop screen, console, env
  ]
  screen-should-contain [
   <span class="Constant"> .  errors found                                                                   run (F4)           .</span>
   <span class="Constant"> .                                                  ╎foo                                              .</span>
   <span class="Constant"> .recipe foo [                                      ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .  local-scope                                     ╎                                                 .</span>
   <span class="Constant"> .  x:num &lt;- copy 0                                 ╎                                                 .</span>
   <span class="Constant"> .  y:&amp;:point &lt;- new point:type                     ╎                                                 .</span>
   <span class="Constant"> .  get *y:&amp;:point, x:num                           ╎                                                 .</span>
   <span class="Constant"> .]                                                 ╎                                                 .</span>
   <span class="Constant"> .foo: second ingredient of 'get' should have type ↩╎                                                 .</span>
   <span class="Constant"> .'offset', but got 'x:num'                         ╎                                                 .</span>
   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎                                                 .</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
]

<span class="muScenario">scenario</span> run-shows-errors-everytime [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  <span class="Comment"># try to run a file with an error</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">15/height</span>
  recipes:text <span class="Special">&lt;-</span> new <span class="Constant">[ </span>
<span class="Constant">recipe foo [</span>
<span class="Constant">  local-scope</span>
<span class="Constant">  x:num &lt;- copy y:num</span>
<span class="Constant">]</span>]
  env:&amp;:environment <span class="Special">&lt;-</span> new-programming-environment screen, recipes, <span class="Constant">[foo]</span>
  assume-console [
    press F4
  ]
  event-loop screen, console, env
  screen-should-contain [
   <span class="Constant"> .  errors found                                                                   run (F4)           .</span>
   <span class="Constant"> .                                                  ╎foo                                              .</span>
   <span class="Constant"> .recipe foo [                                      ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .  local-scope                                     ╎                                                 .</span>
   <span class="Constant"> .  x:num &lt;- copy y:num                             ╎                                                 .</span>
   <span class="Constant"> .]                                                 ╎                                                 .</span>
   <span class="Constant"> .foo: tried to read ingredient 'y' in 'x:num &lt;- co↩╎                                                 .</span>
   <span class="Constant"> .py y:num' but it hasn't been written to yet       ╎                                                 .</span>
   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎                                                 .</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
  <span class="Comment"># rerun the file, check for the same error</span>
  assume-console [
    press F4
  ]
  run [
    event-loop screen, console, env
  ]
  screen-should-contain [
   <span class="Constant"> .  errors found                                                                   run (F4)           .</span>
   <span class="Constant"> .                                                  ╎foo                                              .</span>
   <span class="Constant"> .recipe foo [                                      ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .  local-scope                                     ╎                                                 .</span>
   <span class="Constant"> .  x:num &lt;- copy y:num                             ╎                                                 .</span>
   <span class="Constant"> .]                                                 ╎                                                 .</span>
   <span class="Constant"> .foo: tried to read ingredient 'y' in 'x:num &lt;- co↩╎                                                 .</span>
   <span class="Constant"> .py y:num' but it hasn't been written to yet       ╎                                                 .</span>
   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎                                                 .</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
]

<span class="muScenario">scenario</span> run-instruction-and-print-errors [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">10/height</span>
  <span class="Comment"># right editor contains an illegal instruction</span>
  sandbox:text <span class="Special">&lt;-</span> new <span class="Constant">[get 1234:num, foo:offset]</span>
  env:&amp;:environment <span class="Special">&lt;-</span> new-programming-environment screen, <span class="Constant">[]</span>, sandbox
  <span class="Comment"># run the code in the editors</span>
  assume-console [
    press F4
  ]
  run [
    event-loop screen, console, env
  ]
  <span class="Comment"># check that screen prints error message in red</span>
  screen-should-contain [
   <span class="Constant"> .  errors found (0)                                                               run (F4)           .</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
<span class="Constant">    .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎0   edit          copy            delete         .</span>
   <span class="Constant"> .                                                  ╎get 1234:num, foo:offset                         .</span>
   <span class="Constant"> .                                                  ╎unknown element 'foo' in container 'number'      .</span>
   <span class="Constant"> .                                                  ╎first ingredient of 'get' should be a container,↩.</span>
   <span class="Constant"> .                                                  ╎ but got '1234:num'                              .</span>
   <span class="Constant"> .                                                  ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
  screen-should-contain-in-color <span class="Constant">7/white</span>, [
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                   get 1234:num, foo:offset                         .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
  ]
  screen-should-contain-in-color <span class="Constant">1/red</span>, [
   <span class="Constant"> .  errors found (0)                                                                                  .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                   unknown element 'foo' in container 'number'      .</span>
   <span class="Constant"> .                                                   first ingredient of 'get' should be a container, .</span>
   <span class="Constant"> .                                                    but got '1234:num'                              .</span>
   <span class="Constant"> .                                                                                                    .</span>
  ]
  screen-should-contain-in-color <span class="Constant">245/grey</span>, [
   <span class="Constant"> .                                                                                                    .</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
<span class="Constant">    .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
   <span class="Constant"> .                                                  ╎                                                ↩.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
   <span class="Constant"> .                                                  ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
]

<span class="muScenario">scenario</span> run-instruction-and-print-errors-only-once [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">10/height</span>
  <span class="Comment"># right editor contains an illegal instruction</span>
  sandbox:text <span class="Special">&lt;-</span> new <span class="Constant">[get 1234:num, foo:offset]</span>
  env:&amp;:environment <span class="Special">&lt;-</span> new-programming-environment screen, <span class="Constant">[]</span>, sandbox
  <span class="Comment"># run the code in the editors multiple times</span>
  assume-console [
    press F4
    press F4
  ]
  run [
    event-loop screen, console, env
  ]
  <span class="Comment"># check that screen prints error message just once</span>
  screen-should-contain [
   <span class="Constant"> .  errors found (0)                                                               run (F4)           .</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
<span class="Constant">    .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎0   edit          copy            delete         .</span>
   <span class="Constant"> .                                                  ╎get 1234:num, foo:offset                         .</span>
   <span class="Constant"> .                                                  ╎unknown element 'foo' in container 'number'      .</span>
   <span class="Constant"> .                                                  ╎first ingredient of 'get' should be a container,↩.</span>
   <span class="Constant"> .                                                  ╎ but got '1234:num'                              .</span>
   <span class="Constant"> .                                                  ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
]

<span class="muScenario">scenario</span> sandbox-can-handle-infinite-loop [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">20/height</span>
  <span class="Comment"># left editor is empty</span>
  recipes:text <span class="Special">&lt;-</span> new <span class="Constant">[recipe foo [</span>
<span class="Constant">  {</span>
<span class="Constant">    loop</span>
<span class="Constant">  }</span>
<span class="Constant">]</span>]
  <span class="Comment"># right editor contains an instruction</span>
  env:&amp;:environment <span class="Special">&lt;-</span> new-programming-environment screen, recipes, <span class="Constant">[foo]</span>
  <span class="Comment"># run the sandbox</span>
  assume-console [
    press F4
  ]
  run [
    event-loop screen, console, env
  ]
  screen-should-contain [
   <span class="Constant"> .  errors found (0)                                                               run (F4)           .</span>
   <span class="Constant"> .recipe foo [                                      ╎                                                 .</span>
   <span class="Constant"> .  {                                               ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .    loop                                          ╎0   edit          copy            delete         .</span>
   <span class="Constant"> .  }                                               ╎foo                                              .</span>
   <span class="Constant"> .]                                                 ╎took too long!                                   .</span>
<span class="Constant">    .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
]

<span class="muScenario">scenario</span> sandbox-with-errors-shows-trace [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">10/height</span>
  <span class="Comment"># generate a stash and a error</span>
  recipes:text <span class="Special">&lt;-</span> new <span class="Constant">[recipe foo [</span>
<span class="Constant">local-scope</span>
<span class="Constant">a:num &lt;- next-ingredient</span>
<span class="Constant">b:num &lt;- next-ingredient</span>
<span class="Constant">stash [dividing by]</span>, b
_, c:num <span class="Special">&lt;-</span> divide-with-remainder a, b
<span class="muControl">reply</span> b
]]
  env:&amp;:environment <span class="Special">&lt;-</span> new-programming-environment screen, recipes, <span class="Constant">[foo 4, 0]</span>
  <span class="Comment"># run</span>
  assume-console [
    press F4
  ]
  event-loop screen, console, env
  <span class="Comment"># screen prints error message</span>
  screen-should-contain [
   <span class="Constant"> .  errors found (0)                                                               run (F4)           .</span>
   <span class="Constant"> .recipe foo [                                      ╎                                                 .</span>
   <span class="Constant"> .local-scope                                       ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .a:num &lt;- next-ingredient                          ╎0   edit          copy            delete         .</span>
   <span class="Constant"> .b:num &lt;- next-ingredient                          ╎foo 4, 0                                         .</span>
   <span class="Constant"> .stash [dividing by], b                            ╎foo: divide by zero in '_, c:num &lt;- divide-with-↩.</span>
   <span class="Constant"> ._, c:num &lt;- divide-with-remainder a, b            ╎remainder a, b'                                  .</span>
   <span class="Constant"> .reply b                                           ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .]                                                 ╎                                                 .</span>
  ]
  <span class="Comment"># click on the call in the sandbox</span>
  assume-console [
    left-click<span class="Constant"> 4</span>,<span class="Constant"> 55</span>
  ]
  run [
    event-loop screen, console, env
  ]
  <span class="Comment"># screen should expand trace</span>
  screen-should-contain [
   <span class="Constant"> .  errors found (0)                                                               run (F4)           .</span>
   <span class="Constant"> .recipe foo [                                      ╎                                                 .</span>
   <span class="Constant"> .local-scope                                       ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .a:num &lt;- next-ingredient                          ╎0   edit          copy            delete         .</span>
   <span class="Constant"> .b:num &lt;- next-ingredient                          ╎foo 4, 0                                         .</span>
   <span class="Constant"> .stash [dividing by], b                            ╎dividing by 0                                    .</span>
   <span class="Constant"> ._, c:num &lt;- divide-with-remainder a, b            ╎14 instructions run                              .</span>
   <span class="Constant"> .reply b                                           ╎foo: divide by zero in '_, c:num &lt;- divide-with-↩.</span>
   <span class="Constant"> .]                                                 ╎remainder a, b'                                  .</span>
<span class="Constant">    .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
  ]
]
</pre>
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