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<pre id='vimCodeElement'>
<span class="Comment"># Check our support for fake file systems in scenarios.</span>
<span class="muScenario">scenario</span> read-from-fake-file [
<span class="Constant">local-scope</span>
assume-filesystem [
<span class="Constant">[a]</span><span class="Special"> <- </span>[
<span class="Constant"> |xyz|</span>
]
]
contents:&:source:char<span class="Special"> <- </span>start-reading filesystem:&:filesystem, <span class="Constant">[a]</span>
<span class="Constant">1</span>:char/<span class="Special">raw <- </span>read contents
<span class="Constant">2</span>:char/<span class="Special">raw <- </span>read contents
<span class="Constant">3</span>:char/<span class="Special">raw <- </span>read contents
<span class="Constant">4</span>:char/<span class="Special">raw <- </span>read contents
_, <span class="Constant">5</span>:bool/<span class="Special">raw <- </span>read contents
memory-should-contain [
<span class="Constant">1</span><span class="Special"> <- </span><span class="Constant">120</span> <span class="Comment"># x</span>
<span class="Constant">2</span><span class="Special"> <- </span><span class="Constant">121</span> <span class="Comment"># y</span>
<span class="Constant">3</span><span class="Special"> <- </span><span class="Constant">122</span> <span class="Comment"># z</span>
<span class="Constant">4</span><span class="Special"> <- </span><span class="Constant">10</span> <span class="Comment"># newline</span>
<span class="Constant">5</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># eof</span>
]
]
<span class="muScenario">scenario</span> write-to-fake-file [
<span class="Constant">local-scope</span>
assume-filesystem [
]
sink:&:sink:char, writer:num/routine<span class="Special"> <- </span>start-writing filesystem:&:filesystem, <span class="Constant">[a]</span>
sink<span class="Special"> <- </span>write sink, <span class="Constant">120/x</span>
sink<span class="Special"> <- </span>write sink, <span class="Constant">121/y</span>
close sink
wait-for-routine writer
contents-read-back:text<span class="Special"> <- </span>slurp filesystem, <span class="Constant">[a]</span>
<span class="Constant">10</span>:bool/<span class="Special">raw <- </span>equal contents-read-back, <span class="Constant">[xy]</span>
memory-should-contain [
<span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># file contents read back exactly match what was written</span>
]
]
<span class="muScenario">scenario</span> write-to-fake-file-that-exists [
<span class="Constant">local-scope</span>
assume-filesystem [
<span class="Constant">[a]</span><span class="Special"> <- </span><span class="Constant">[]</span>
]
sink:&:sink:char, writer:num/routine<span class="Special"> <- </span>start-writing filesystem:&:filesystem, <span class="Constant">[a]</span>
sink<span class="Special"> <- </span>write sink, <span class="Constant">120/x</span>
sink<span class="Special"> <- </span>write sink, <span class="Constant">121/y</span>
close sink
wait-for-routine writer
contents-read-back:text<span class="Special"> <- </span>slurp filesystem, <span class="Constant">[a]</span>
<span class="Constant">10</span>:bool/<span class="Special">raw <- </span>equal contents-read-back, <span class="Constant">[xy]</span>
memory-should-contain [
<span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># file contents read back exactly match what was written</span>
]
]
<span class="muScenario">scenario</span> write-to-existing-file-preserves-other-files [
<span class="Constant">local-scope</span>
assume-filesystem [
<span class="Constant">[a]</span><span class="Special"> <- </span><span class="Constant">[]</span>
<span class="Constant">[b]</span><span class="Special"> <- </span>[
<span class="Constant"> |bcd|</span>
]
]
sink:&:sink:char, writer:num/routine<span class="Special"> <- </span>start-writing filesystem:&:filesystem, <span class="Constant">[a]</span>
sink<span class="Special"> <- </span>write sink, <span class="Constant">120/x</span>
sink<span class="Special"> <- </span>write sink, <span class="Constant">121/y</span>
close sink
wait-for-routine writer
contents-read-back:text<span class="Special"> <- </span>slurp filesystem, <span class="Constant">[a]</span>
<span class="Constant">10</span>:bool/<span class="Special">raw <- </span>equal contents-read-back, <span class="Constant">[xy]</span>
other-file-contents:text<span class="Special"> <- </span>slurp filesystem, <span class="Constant">[b]</span>
<span class="Constant">11</span>:bool/<span class="Special">raw <- </span>equal other-file-contents, <span class="Constant">[bcd</span>
<span class="Constant">]</span>
memory-should-contain [
<span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># file contents read back exactly match what was written</span>
<span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># other files also continue to persist unchanged</span>
]
]
<span class="muRecipe">def</span> slurp fs:&:filesystem, filename:text<span class="muRecipe"> -> </span>contents:text [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
source:&:source:char<span class="Special"> <- </span>start-reading fs, filename
buf:&:buffer<span class="Special"> <- </span>new-buffer <span class="Constant">30/capacity</span>
<span class="Delimiter">{</span>
c:char, done?:bool, source<span class="Special"> <- </span>read source
<span class="muControl">break-if</span> done?
buf<span class="Special"> <- </span>append buf, c
<span class="muControl">loop</span>
<span class="Delimiter">}</span>
contents<span class="Special"> <- </span>buffer-to-array buf
]
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