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added tests for yield in switch & for loop expressions

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alubbe 2014-11-21 23:14:53 +01:00
parent a9fbf14adf
commit 5950d6328d
1 changed files with 29 additions and 8 deletions
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37
test/generators.coffee
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@ -81,7 +81,6 @@ test "yield in if statements", ->
ok y.value is 3 and y.done is true
test "symbolic operators has precedence over the `yield`", ->
symbolic = '+ - * / << >> & | || && ** ^ // or and'.split ' '
compound = ("#{op}=" for op in symbolic)
relations = '< > == != <= >= is isnt'.split ' '
@ -91,15 +90,37 @@ test "symbolic operators has precedence over the `yield`", ->
collect = (gen) -> ref.value until (ref = gen.next()).done
values = [0, 1, 2, 3]
for op in operators
expression = "i #{op} 2"
yielded = CoffeeScript.eval "(arr) -> yield #{expression} for i in arr"
mapped = CoffeeScript.eval "(arr) -> (#{expression} for i in arr)"
yielded = CoffeeScript.eval "(arr) -> yield #{expression} for i in arr"
mapped = CoffeeScript.eval "(arr) -> (#{expression} for i in arr)"
expected = mapped values
actual = collect yielded values
arrayEq mapped(values), collect yielded values
arrayEq actual, expected
test "for loop expressions", ->
x = do ->
y = for i in [1..3]
yield i * 2
z = x.next()
ok z.value is 2 and z.done is false
z = x.next 10
ok z.value is 4 and z.done is false
z = x.next 20
ok z.value is 6 and z.done is false
z = x.next 30
arrayEq z.value, [10, 20, 30]
ok z.done is true
test "switch expressions", ->
x = do ->
y = switch yield 1
when 2 then yield 1337
z = x.next()
ok z.value is 1 and z.done is false
z = x.next 2
ok z.value is 1337 and z.done is false
z = x.next 3
ok z.value is 3 and z.done is true