José Valim
7ddab53707
The function macro is still necessary for function retrieval and it will be extended when R16 is out to supported named functions
95 lines
2.8 KiB
Erlang
95 lines
2.8 KiB
Erlang
-module(function_test).
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-include_lib("eunit/include/eunit.hrl").
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-compile({parse_transform, elixir_transform}).
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eval(Content) ->
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{ Value, Binding, _ } = elixir:eval(Content, []),
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{ Value, Binding }.
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function_arg_do_end_test() ->
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{3, _} = eval("if date do\n1 + 2\nend"),
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{nil, _} = eval("if date do end").
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function_stab_end_test() ->
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{_, [{a, Fun}]} = eval("a = fn -> 1 + 2 end"),
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3 = Fun().
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function_stab_many_test() ->
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{_, [{a, Fun}]} = eval("a = fn\n{ :foo, x } -> x\n{ :bar, x } -> x\nend"),
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1 = Fun({ foo, 1 }),
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2 = Fun({ bar, 2 }).
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function_stab_inline_test() ->
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{_, [{a, Fun}]} = eval("a = fn { :foo, x } -> x; { :bar, x } -> x end"),
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1 = Fun({ foo, 1 }),
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2 = Fun({ bar, 2 }).
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function_with_args_test() ->
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{Fun, _} = eval("fn(a, b) -> a + b end"),
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3 = Fun(1,2).
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function_with_kv_args_test() ->
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{Fun, _} = eval("fn(a, [other: b, another: c]) -> a + b + c end"),
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6 = Fun(1,[{other,2}, {another,3}]).
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function_as_clojure_test() ->
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{_, [{a, Res1}|_]} = eval("b = 1; a = fn -> b + 2 end"),
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3 = Res1().
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function_apply_test() ->
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{3,_} = eval("a = fn -> 3 end; apply a, []").
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function_apply_with_args_test() ->
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{3,_} = eval("a = fn b -> b + 2 end; apply a, [1]").
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function_apply_and_clojure_test() ->
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{3,_} = eval("b = 1; a = fn -> b + 2 end; apply a, []").
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function_parens_test() ->
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{0,_} = eval("(fn() -> 0 end).()"),
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{1,_} = eval("(fn(1) -> 1 end).(1)"),
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{3,_} = eval("(fn(1, 2) -> 3 end).(1, 2)"),
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{0,_} = eval("(fn () -> 0 end).()"),
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{1,_} = eval("(fn (1) -> 1 end).(1)"),
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{3,_} = eval("(fn (1, 2) -> 3 end).(1, 2)").
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function_macro_parens_test() ->
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{0,_} = eval("(function do () -> 0 end).()"),
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{1,_} = eval("(function do 1 -> 1 end).(1)"),
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{3,_} = eval("(function do 1, 2 -> 3 end).(1, 2)"),
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{1,_} = eval("(function do (1) -> 1 end).(1)"),
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{3,_} = eval("(function do (1, 2) -> 3 end).(1, 2)").
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%% Function calls
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function_call_test() ->
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{3, _} = eval("x = fn a, b -> a + b end\nx.(1,2)").
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function_call_without_arg_test() ->
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{3, _} = eval("x = fn -> 2 + 1 end\nx.()").
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function_call_do_end_test() ->
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{[1,[{do,2},{else,3}]], _} = eval("x = fn a, b -> [a,b] end\nx.(1) do\n2\nelse 3\nend").
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function_call_with_assignment_test() ->
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{3, [{a,_},{c, 3}]} = eval("a = fn x -> x + 2 end; c = a.(1)").
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function_calls_with_multiple_expressions_test() ->
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{26, _} = eval("a = fn a, b -> a + b end; a.((3 + 4 - 1), (2 * 10))").
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function_calls_with_multiple_args_with_line_breaks_test() ->
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{5, _} = eval("a = fn a, b -> a + b end; a.(\n3,\n2\n)").
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function_calls_with_parenthesis_test() ->
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{3, [{a,_},{b,1}]} = eval("a = (fn x -> x + 2 end).(b = 1)").
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%% Partial application
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require_partial_application_test() ->
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{ Fun, _ } = eval("List.flatten(&1)"),
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Fun = fun 'Elixir.List':flatten/1.
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import_partial_application_test() ->
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{ Fun, _ } = eval("is_atom(&1)"),
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Fun = fun erlang:is_atom/1. |