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bound functions do not perserve arities #3257

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15 changes: 15 additions & 0 deletions test/classes.coffee
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Original file line number Diff line number Diff line change
Expand Up @@ -205,6 +205,21 @@ test "a bound function in a bound function", ->
eq (func() for func in m.generate()).join(' '), '10 10 10'


test "bound functions in a class do perserve arities", ->
class Mini
unary_func: (a0)=>
binary_func: (a0, a1)=>
tinary_func: (a0, a1, a2)=>
obj = new Mini
obj2 =
unary_func: obj.unary_func
binary_func: obj.binary_func
tinary_func: obj.tinary_func

eq obj2.unary_func.length, 1
eq obj2.binary_func.length, 2
eq obj2.tinary_func.length, 3

test "contructor called with varargs", ->

class Connection
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15 changes: 15 additions & 0 deletions test/functions.coffee
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Original file line number Diff line number Diff line change
Expand Up @@ -87,6 +87,21 @@ test "self-referencing functions", ->
eq changeMe, 2


test "bound functions do perserve arities", ->
obj =
unary_func: (a0)=>
binary_func: (a0, a1)=>
tinary_func: (a0, a1, a2)=>
obj2 =
unary_func: obj.unary_func
binary_func: obj.binary_func
tinary_func: obj.tinary_func

eq obj2.unary_func.length, 1
eq obj2.binary_func.length, 2
eq obj2.tinary_func.length, 3


# Parameter List Features

test "splats", ->
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