## handling malformed programs
container environment [
recipe-errors:text
]
# load code from disk, save any errors
def! update-recipes env:&:environment, resources:&:resources, screen:&:screen -> errors-found?:bool, env:&:environment, screen:&:screen [
local-scope
load-ingredients
in:text <- slurp resources, [lesson/recipes.mu]
recipe-errors:text <- reload in
*env <- put *env, recipe-errors:offset, recipe-errors
# if recipe editor has errors, stop
{
break-unless recipe-errors
update-status screen, [errors found ], 1/red
errors-found? <- copy 1/true
return
}
errors-found? <- copy 0/false
]
before <end-render-components> [
trace 11, [app], [render status]
recipe-errors:text <- get *env, recipe-errors:offset
{
break-unless recipe-errors
update-status screen, [errors found ], 1/red
}
]
container environment [
error-index:num # index of first sandbox with an error (or -1 if none)
]
after <programming-environment-initialization> [
*result <- put *result, error-index:offset, -1
]
after <begin-run-sandboxes> [
*env <- put *env, error-index:offset, -1
]
before <end-run-sandboxes> [
{
error-index:num <- get *env, error-index:offset
sandboxes-completed-successfully?:bool <- equal error-index, -1
break-if sandboxes-completed-successfully?
errors-found? <- copy 1/true
}
]
before <end-render-components> [
{
break-if recipe-errors
error-index:num <- get *env, error-index:offset
sandboxes-completed-successfully?:bool <- equal error-index, -1
break-if sandboxes-completed-successfully?
error-index-text:text <- to-text error-index
status:text <- interpolate [errors found (_) ], error-index-text
update-status screen, status, 1/red
}
]
container sandbox [
errors:text
]
def! update-sandbox sandbox:&:sandbox, env:&:environment, idx:num -> sandbox:&:sandbox, env:&:environment [
local-scope
load-ingredients
{
recipe-errors:text <- get *env, recipe-errors:offset
break-unless recipe-errors
*sandbox <- put *sandbox, errors:offset, recipe-errors
return
}
data:text <- get *sandbox, data:offset
response:text, errors:text, fake-screen:&:screen, trace:text, completed?:bool <- run-sandboxed data
*sandbox <- put *sandbox, response:offset, response
*sandbox <- put *sandbox, errors:offset, errors
*sandbox <- put *sandbox, screen:offset, fake-screen
*sandbox <- put *sandbox, trace:offset, trace
{
break-if errors
break-if completed?
errors <- new [took too long!
]
*sandbox <- put *sandbox, errors:offset, errors
}
{
break-unless errors
error-index:num <- get *env, error-index:offset
error-not-set?:bool <- equal error-index, -1
break-unless error-not-set?
*env <- put *env, error-index:offset, idx
}
]
# make sure we render any trace
after <render-sandbox-trace-done> [
{
sandbox-errors:text <- get *sandbox, errors:offset
break-unless sandbox-errors
*sandbox <- put *sandbox, response-starting-row-on-screen:offset, 0 # no response
{
break-unless env
recipe-errors:text <- get *env, recipe-errors:offset
row, screen <- render-text screen, recipe-errors, left, right, 1/red, row
}
row, screen <- render-text screen, sandbox-errors, left, right, 1/red, row
# don't try to print anything more for this sandbox
jump +render-sandbox-end
}
]
scenario run-shows-errors-in-get [
local-scope
trace-until 100/app # trace too long
assume-screen 50/width, 20/height
assume-resources [
[lesson/recipes.mu] <- [
|recipe foo [|
| get 123:num, foo:offset|
|]|
]
]
env:&:environment <- new-programming-environment resources, screen, [foo]
render-all screen, env, render
screen-should-contain [
. run (F4) .
.foo .
.──────────────────────────────────────────────────.
. .
]
assume-console [
press F4
]
run [
event-loop screen, console, env, resources
]
screen-should-contain [
. errors found run (F4) .
. .
.──────────────────────────────────────────────────.
.0 edit copy delete .
.foo .
.foo: unknown element 'foo' in container 'number' .
.foo: first ingredient of 'get' should be a contai↩.
.ner, but got '123:num' .
]
screen-should-contain-in-color 1/red, [
. errors found .
. .
]
]
scenario run-updates-status-with-first-erroneous-sandbox [
local-scope
trace-until 100/app # trace too long
assume-screen 50/width, 20/height
assume-resources [
]
env:&:environment <- new-programming-environment resources, screen, []
render-all screen, env, render
assume-console [
# create invalid sandbox 1
type [get foo, x:offset]
press F4
# create invalid sandbox 0
type [get foo, x:offset]
press F4
]
run [
event-loop screen, console, env, resources
]
# status line shows that error is in first sandbox
screen-should-contain [
. errors found (0) run (F4) .
]
]
scenario run-updates-status-with-first-erroneous-sandbox-2 [
local-scope
trace-until 100/app # trace too long
assume-screen 50/width, 20/height
assume-resources [
]
env:&:environment <- new-programming-environment resources, screen, []
render-all screen, env, render
assume-console [
# create invalid sandbox 2
type [get foo, x:offset]
press F4
# create invalid sandbox 1
type [get foo, x:offset]
press F4
# create valid sandbox 0
type [add 2, 2]
press F4
]
run [
event-loop screen, console, env, resources
]
# status line shows that error is in second sandbox
screen-should-contain [
. errors found (1) run (F4) .
]
]
scenario run-hides-errors-from-past-sandboxes [
local-scope
trace-until 100/app # trace too long
assume-screen 50/width, 20/height
assume-resources [
]
env:&:environment <- new-programming-environment resources, screen, [get foo, x:offset] # invalid
render-all screen, env, render
assume-console [
press F4 # generate error
]
event-loop screen, console, env, resources
assume-console [
left-click 3, 10
press ctrl-k
type [add 2, 2] # valid code
press F4 # update sandbox
]
run [
event-loop screen, console, env, resources
]
# error should disappear
screen-should-contain [
. run (F4) .
. .
.──────────────────────────────────────────────────.
.0 edit copy delete .
.add 2, 2 .
.4 .
.──────────────────────────────────────────────────.
. .
]
]
scenario run-updates-errors-for-shape-shifting-recipes [
local-scope
trace-until 100/app # trace too long
assume-screen 50/width, 20/height
# define a shape-shifting recipe with an error
assume-resources [
[lesson/recipes.mu] <- [
|recipe foo x:_elem -> z:_elem [|
| local-scope|
| load-ingredients|
| y:&:num <- copy 0|
| z <- add x, y|
|]|
]
]
env:&:environment <- new-programming-environment resources, screen, [foo 2]
render-all screen, env, render
assume-console [
press F4
]
event-loop screen, console, env, resources
screen-should-contain [
. errors found (0) run (F4) .
. .
.──────────────────────────────────────────────────.
.0 edit copy delete .
.foo 2 .
.foo_2: 'add' requires number ingredients, but got↩.
. 'y' .
.──────────────────────────────────────────────────.
. .
]
# now rerun everything
assume-console [
press F4
]
run [
event-loop screen, console, env, resources
]
# error should remain unchanged
screen-should-contain [
. errors found (0) run (F4) .
. .
.──────────────────────────────────────────────────.
.0 edit copy delete .
.foo 2 .
.foo_3: 'add' requires number ingredients, but got↩.
. 'y' .
.──────────────────────────────────────────────────.
. .
]
]
scenario run-avoids-spurious-errors-on-reloading-shape-shifting-recipes [
local-scope
trace-until 100/app # trace too long
assume-screen 50/width, 20/height
# overload a well-known shape-shifting recipe
assume-resources [
[lesson/recipes.mu] <- [
|recipe length l:&:list:_elem -> n:num [|
|]|
]
]
# call code that uses other variants of it, but not it itself
test-sandbox:text <- new [x:&:list:num <- copy 0
to-text x]
env:&:environment <- new-programming-environment resources, screen, test-sandbox
render-all screen, env, render
# run it once
assume-console [
press F4
]
event-loop screen, console, env, resources
# no errors anywhere on screen (can't check anything else, since to-text will return an address)
screen-should-contain-in-color 1/red, [
. .
. .
. .
. .
. <- .
. .
. .
. .
. .
]
# rerun everything
assume-console [
press F4
]
run [
event-loop screen, console, env, resources
]
# still no errors
screen-should-contain-in-color 1/red, [
. .
. .
. .
. .
. <- .
. .
. .
. .
. .
]
]
scenario run-shows-missing-type-errors [
local-scope
trace-until 100/app # trace too long
assume-screen 50/width, 20/height
assume-resources [
[lesson/recipes.mu] <- [
|recipe foo [|
| x <- copy 0|
|]|
]
]
env:&:environment <- new-programming-environment resources, screen, [foo]
render-all screen, env, render
assume-console [
press F4
]
run [
event-loop screen, console, env, resources
]
screen-should-contain [
. errors found run (F4) .
. .
.──────────────────────────────────────────────────.
.0 edit copy delete .
.foo .
.foo: missing type for 'x' in 'x <- copy 0' .
]
]
scenario run-shows-unbalanced-bracket-errors [
local-scope
trace-until 100/app # trace too long
assume-screen 50/width, 20/height
# recipe is incomplete (unbalanced '[')
assume-resources [
[lesson/recipes.mu] <- [
|recipe foo \\\[|
| x <- copy 0|
]
]
env:&:environment <- new-programming-environment resources, screen, [foo]
render-all screen, env, render
assume-console [
press F4
]
run [
event-loop screen, console, env, resources
]
screen-should-contain [
. errors found run (F4) .
. .
.──────────────────────────────────────────────────.
.0 edit copy delete .
.foo .
.9: unbalanced '\\[' for recipe .
.9: unbalanced '\\[' for recipe .
.──────────────────────────────────────────────────.
. .
]
]
scenario run-shows-get-on-non-container-errors [
local-scope
trace-until 100/app # trace too long
assume-screen 50/width, 20/height
assume-resources [
[lesson/recipes.mu] <- [
|recipe foo [|
| local-scope|
| x:&:point <- new point:type|
| get x:&:point, 1:offset|
|]|
]
]
env:&:environment <- new-programming-environment resources, screen, [foo]
render-all screen, env, render
assume-console [
press F4
]
run [
event-loop screen, console, env, resources
]
screen-should-contain [
. errors found run (F4) .
. .
.──────────────────────────────────────────────────.
.0 edit copy delete .
.foo .
.foo: first ingredient of 'get' should be a contai↩.
.ner, but got 'x:&:point' .
]
]
scenario run-shows-non-literal-get-argument-errors [
local-scope
trace-until 100/app # trace too long
assume-screen 50/width, 20/height
assume-resources [
[lesson/recipes.mu] <- [
|recipe foo [|
| local-scope|
| x:num <- copy 0|
| y:&:point <- new point:type|
| get *y:&:point, x:num|
|]|
]
]
env:&:environment <- new-programming-environment resources, screen, [foo]
render-all screen, env, render
assume-console [
press F4
]
run [
event-loop screen, console, env, resources
]
screen-should-contain [
. errors found run (F4) .
. .
.──────────────────────────────────────────────────.
.0 edit copy delete .
.foo .
.foo: second ingredient of 'get' should have type ↩.
.'offset', but got 'x:num' .
]
]
scenario run-shows-errors-every-time [
local-scope
trace-until 100/app # trace too long
assume-screen 50/width, 20/height
# try to run a file with an error
assume-resources [
[lesson/recipes.mu] <- [
|recipe foo [|
| local-scope|
| x:num <- copy y:num|
|]|
]
]
env:&:environment <- new-programming-environment resources, screen, [foo]
render-all screen, env, render
assume-console [
press F4
]
event-loop screen, console, env, resources
screen-should-contain [
. errors found run (F4) .
. .
.──────────────────────────────────────────────────.
.0 edit copy delete .
.foo .
.foo: tried to read ingredient 'y' in 'x:num <- co↩.
.py y:num' but it hasn't been written to yet .
]
# rerun the file, check for the same error
assume-console [
press F4
]
run [
event-loop screen, console, env, resources
]
screen-should-contain [
. errors found run (F4) .
. .
.──────────────────────────────────────────────────.
.0 edit copy delete .
.foo .
.foo: tried to read ingredient 'y' in 'x:num <- co↩.
.py y:num' but it hasn't been written to yet .
]
]
scenario run-instruction-and-print-errors [
local-scope
trace-until 100/app # trace too long
assume-screen 50/width, 15/height
assume-resources [
]
# editor contains an illegal instruction
env:&:environment <- new-programming-environment resources, screen, [get 1:&:point, 1:offset]
render-all screen, env, render
assume-console [
press F4
]
run [
event-loop screen, console, env, resources
]
# check that screen prints error message in red
screen-should-contain [
. errors found (0) run (F4) .
. .
.──────────────────────────────────────────────────.
.0 edit copy delete .
.get 1:&:point, 1:offset .
.first ingredient of 'get' should be a container, ↩.
.but got '1:&:point' .
.──────────────────────────────────────────────────.
. .
]
screen-should-contain-in-color 1/red, [
. errors found (0) .
. .
. .
. .
. .
.first ingredient of 'get' should be a container, .
.but got '1:&:point' .
. .
. .
]
]
scenario run-instruction-and-print-errors-only-once [
local-scope
trace-until 100/app # trace too long
assume-screen 50/width, 10/height
assume-resources [
]
# editor contains an illegal instruction
env:&:environment <- new-programming-environment resources, screen, [get 1234:num, foo:offset]
render-all screen, env, render
# run the code in the editors multiple times
assume-console [
press F4
press F4
]
run [
event-loop screen, console, env, resources
]
# check that screen prints error message just once
screen-should-contain [
. errors found (0) run (F4) .
. .
.──────────────────────────────────────────────────.
.0 edit copy delete .
.get 1234:num, foo:offset .
.unknown element 'foo' in container 'number' .
.first ingredient of 'get' should be a container, ↩.
.but got '1234:num' .
.──────────────────────────────────────────────────.
. .
]
]
scenario sandbox-can-handle-infinite-loop [
local-scope
trace-until 100/app # trace too long
assume-screen 50/width, 20/height
assume-resources [
]
# editor contains an infinite loop
test-sandbox:text <- new [{
loop
}]
env:&:environment <- new-programming-environment resources, screen, test-sandbox
render-all screen, env, render
# run the sandbox
assume-console [
press F4
]
run [
event-loop screen, console, env, resources
]
screen-should-contain [
. errors found (0) run (F4) .
. .
.──────────────────────────────────────────────────.
.0 edit copy delete .
.{ .
.loop .
.} .
.took too long! .
.──────────────────────────────────────────────────.
. .
]
]
scenario sandbox-with-errors-shows-trace [
local-scope
trace-until 100/app # trace too long
assume-screen 50/width, 20/height
# generate a stash and a error
assume-resources [
[lesson/recipes.mu] <- [
|recipe foo [|
| local-scope|
| a:num <- next-ingredient|
| b:num <- next-ingredient|
| stash [dividing by], b|
| _, c:num <- divide-with-remainder a, b|
| reply b|
|]|
]
]
env:&:environment <- new-programming-environment resources, screen, [foo 4, 0]
render-all screen, env, render
# run
assume-console [
press F4
]
event-loop screen, console, env, resources
# screen prints error message
screen-should-contain [
. errors found (0) run (F4) .
. .
.──────────────────────────────────────────────────.
.0 edit copy delete .
.foo 4, 0 .
.foo: divide by zero in '_, c:num <- divide-with-r↩.
.emainder a, b' .
.──────────────────────────────────────────────────.
. .
]
# click on the call in the sandbox
assume-console [
left-click 4, 15
]
run [
event-loop screen, console, env, resources
]
# screen should expand trace
screen-should-contain [
. errors found (0) run (F4) .
. .
.──────────────────────────────────────────────────.
.0 edit copy delete .
.foo 4, 0 .
.dividing by 0 .
.14 instructions run .
.foo: divide by zero in '_, c:num <- divide-with-r↩.
.emainder a, b' .
.──────────────────────────────────────────────────.
. .
]
]