iced-coffee-script loop problems

heh.coffee

delay = (func) ->
    setTimeout func, 1

arrEq = (a, b) ->
    r = a.length is b.length and a.every (elem, i) -> elem is b[i]
    if not r
        console.log 'arrays not equal', a, '!=', b
        console.trace()

await delay defer()

# Step function should be called exactly once.

makeFunc = ->
    calld = false
    return ->
        if calld
            console.log 'step function called twice'
            console.trace()

        calld = true
        return 2

expected = [1,3]

func = makeFunc()
arr = []
for x in [1,2,3] by func()
    arr.push x

arrEq expected, arr

was_called = false
func = ->
    was_called = true
    return 2

# function will not be called because specified step
# is ignored and 1 is used
arr = []
for x in [1,2,3] by func()
    await delay defer()
    arr.push x

if not was_called
    console.log 'function was not called'
    console.trace()

arrEq expected, arr

func = makeFunc()
arr = []
for x in [1..3] by func()
    arr.push x

arrEq expected, arr

func = makeFunc()
arr = []
for x in [1..3] by func()
    await delay defer()
    arr.push x

arrEq expected, arr

# Strides with steps that do not match direction of range are weird in
# coffee. Still, iced should mimic whatever coffee does.

for x in [1..3] by -1
    console.log 'should never get here'
    console.trace()
    break

for x in [1..3] by -1
    await delay defer()
    console.log 'should never get here'
    console.trace()
    break

for x in [3..1] by 1
    console.log 'should never get here'
    console.trace()
    break

for x in [3..1] by 1
    await delay defer()
    console.log 'should never get here'
    console.trace()
    break

# Without specified step, it is set to match range.

expected = [3,2,1]

arr = []
for x in [3..1]
    arr.push x

arrEq expected, arr

arr = []
for x in [3..1]
    await delay defer()
    arr.push x

arrEq expected, arr

# Should also work with exclusive ranges

expected = [3,2]

arr = []
for x in [3...1]
    arr.push x

arrEq expected, arr

arr = []
for x in [3...1]
    await delay defer()
    arr.push x

arrEq expected, arr