81 lines
2.0 KiB
CoffeeScript
81 lines
2.0 KiB
CoffeeScript
# REPL
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# ----
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Stream = require 'stream'
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class MockInputStream extends Stream
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constructor: ->
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@readable = true
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resume: ->
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emitLine: (val) ->
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@emit 'data', new Buffer("#{val}\n")
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class MockOutputStream extends Stream
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constructor: ->
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@writable = true
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@written = []
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write: (data) ->
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#console.log 'output write', arguments
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@written.push data
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lastWrite: (fromEnd = -1) ->
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@written[@written.length - 1 + fromEnd].replace /\n$/, ''
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testRepl = (desc, fn) ->
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input = new MockInputStream
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output = new MockOutputStream
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Repl.start {input, output}
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test desc, -> fn input, output
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ctrlV = { ctrl: true, name: 'v'}
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testRepl "starts with coffee prompt", (input, output) ->
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eq 'coffee> ', output.lastWrite(0)
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testRepl "writes eval to output", (input, output) ->
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input.emitLine '1+1'
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eq '2', output.lastWrite()
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testRepl "comments are ignored", (input, output) ->
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input.emitLine '1 + 1 #foo'
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eq '2', output.lastWrite()
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testRepl "output in inspect mode", (input, output) ->
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input.emitLine '"1 + 1\\n"'
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eq "'1 + 1\\n'", output.lastWrite()
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testRepl "variables are saved", (input, output) ->
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input.emitLine "foo = 'foo'"
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input.emitLine 'foobar = "#{foo}bar"'
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eq "'foobar'", output.lastWrite()
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testRepl "empty command evaluates to undefined", (input, output) ->
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input.emitLine ''
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eq 'undefined', output.lastWrite()
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testRepl "ctrl-v toggles multiline prompt", (input, output) ->
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input.emit 'keypress', null, ctrlV
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eq '------> ', output.lastWrite(0)
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input.emit 'keypress', null, ctrlV
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eq 'coffee> ', output.lastWrite(0)
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testRepl "multiline continuation changes prompt", (input, output) ->
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input.emit 'keypress', null, ctrlV
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input.emitLine ''
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eq '....... ', output.lastWrite(0)
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testRepl "evaluates multiline", (input, output) ->
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# Stubs. Could assert on their use.
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output.cursorTo = (pos) ->
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output.clearLine = ->
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input.emit 'keypress', null, ctrlV
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input.emitLine 'do ->'
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input.emitLine ' 1 + 1'
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input.emit 'keypress', null, ctrlV
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eq '2', output.lastWrite()
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