569 lines
18 KiB
Elixir
569 lines
18 KiB
Elixir
Code.require_file "test_helper.exs", __DIR__
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defmodule Macro.ExternalTest do
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defmacro external do
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line = 18
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file = __ENV__.file
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^line = __CALLER__.line
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^file = __CALLER__.file
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^line = Macro.Env.location(__CALLER__)[:line]
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^file = Macro.Env.location(__CALLER__)[:file]
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end
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defmacro oror(left, right) do
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quote do: unquote(left) || unquote(right)
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end
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end
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defmodule MacroTest do
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use ExUnit.Case, async: true
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# Changing the lines above will make compilation
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# fail since we are asserting on the caller lines
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import Macro.ExternalTest
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## Escape
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test :escape_handle_tuples_with_size_different_than_two do
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assert {:{}, [], [:a]} == Macro.escape({:a})
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assert {:{}, [], [:a, :b, :c]} == Macro.escape({:a, :b, :c})
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assert {:{}, [], [:a, {:{}, [], [1,2,3]}, :c]} == Macro.escape({:a, {1, 2, 3}, :c})
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end
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test :escape_simply_returns_tuples_with_size_equal_to_two do
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assert {:a, :b} == Macro.escape({:a, :b})
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end
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test :escape_simply_returns_any_other_structure do
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assert [1, 2, 3] == Macro.escape([1, 2, 3])
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end
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test :escape_handles_maps do
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assert {:%{}, [], [a: 1]} = Macro.escape(%{a: 1})
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end
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test :escape_handles_bitstring do
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assert {:<<>>, [], [{:::, [], [1, 4]}, ","]} == Macro.escape(<<300::12>>)
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end
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test :escape_works_recursively do
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assert [1,{:{}, [], [:a,:b,:c]}, 3] == Macro.escape([1, {:a, :b, :c}, 3])
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end
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test :escape_improper do
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assert [{:|, [], [1,2]}] == Macro.escape([1|2])
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assert [1,{:|, [], [2,3]}] == Macro.escape([1,2|3])
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end
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test :escape_with_unquote do
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contents = quote unquote: false, do: unquote(1)
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assert Macro.escape(contents, unquote: true) == 1
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contents = quote unquote: false, do: unquote(x)
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assert Macro.escape(contents, unquote: true) == {:x, [], MacroTest}
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end
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defp eval_escaped(contents) do
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{eval, []} = Code.eval_quoted(Macro.escape(contents, unquote: true))
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eval
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end
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test :escape_with_remote_unquote do
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contents = quote unquote: false, do: Kernel.unquote(:is_atom)(:ok)
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assert eval_escaped(contents) == quote(do: Kernel.is_atom(:ok))
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end
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test :escape_with_nested_unquote do
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contents = quote do
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quote do: unquote(x)
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end
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assert eval_escaped(contents) == quote do: (quote do: unquote(x))
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end
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test :escape_with_alias_or_no_args_remote_unquote do
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contents = quote unquote: false, do: Kernel.unquote(:self)
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assert eval_escaped(contents) == quote(do: Kernel.self())
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contents = quote unquote: false, do: x.unquote(Foo)
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assert eval_escaped(contents) == quote(do: x.unquote(Foo))
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end
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test :escape_with_splicing do
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contents = quote unquote: false, do: [1, 2, 3, 4, 5]
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assert Macro.escape(contents, unquote: true) == [1, 2, 3, 4, 5]
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contents = quote unquote: false, do: [1, 2, unquote_splicing([3, 4, 5])]
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assert eval_escaped(contents) == [1, 2, 3, 4, 5]
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contents = quote unquote: false, do: [unquote_splicing([1, 2, 3]), 4, 5]
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assert eval_escaped(contents) == [1, 2, 3, 4, 5]
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contents = quote unquote: false, do: [unquote_splicing([1, 2, 3]), unquote_splicing([4, 5])]
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assert eval_escaped(contents) == [1, 2, 3, 4, 5]
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contents = quote unquote: false, do: [1, unquote_splicing([2]), 3, unquote_splicing([4]), 5]
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assert eval_escaped(contents) == [1, 2, 3, 4, 5]
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contents = quote unquote: false, do: [1, unquote_splicing([2]), 3, unquote_splicing([4])|[5]]
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assert eval_escaped(contents) == [1, 2, 3, 4, 5]
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end
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## Expansion
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test :expand_once do
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assert {:||, _, _} = Macro.expand_once(quote(do: oror(1, false)), __ENV__)
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end
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test :expand_once_with_raw_atom do
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assert Macro.expand_once(quote(do: :foo), __ENV__) == :foo
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end
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test :expand_once_with_current_module do
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assert Macro.expand_once(quote(do: __MODULE__), __ENV__) == __MODULE__
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end
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test :expand_once_with_main do
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assert Macro.expand_once(quote(do: Elixir), __ENV__) == Elixir
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end
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test :expand_once_with_simple_alias do
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assert Macro.expand_once(quote(do: Foo), __ENV__) == Foo
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end
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test :expand_once_with_current_module_plus_alias do
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assert Macro.expand_once(quote(do: __MODULE__.Foo), __ENV__) == __MODULE__.Foo
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end
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test :expand_once_with_main_plus_alias do
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assert Macro.expand_once(quote(do: Elixir.Foo), __ENV__) == Foo
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end
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test :expand_once_with_custom_alias do
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alias Foo, as: Bar
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assert Macro.expand_once(quote(do: Bar.Baz), __ENV__) == Foo.Baz
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end
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test :expand_once_with_main_plus_custom_alias do
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alias Foo, as: Bar, warn: false
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assert Macro.expand_once(quote(do: Elixir.Bar.Baz), __ENV__) == Elixir.Bar.Baz
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end
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test :expand_once_with_op do
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assert Macro.expand_once(quote(do: Foo.bar.Baz), __ENV__) == (quote do
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Foo.bar.Baz
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end)
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end
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test :expand_once_with_erlang do
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assert Macro.expand_once(quote(do: :foo), __ENV__) == :foo
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end
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test :expand_once_env do
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env = %{__ENV__ | line: 0}
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assert Macro.expand_once(quote(do: __ENV__), env) == {:%{}, [], Map.to_list(env)}
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assert Macro.expand_once(quote(do: __ENV__.file), env) == env.file
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assert Macro.expand_once(quote(do: __ENV__.unknown), env) == quote(do: __ENV__.unknown)
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end
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defmacro local_macro do
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:local_macro
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end
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test :expand_once_local_macro do
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assert Macro.expand_once(quote(do: local_macro), __ENV__) == :local_macro
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end
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test :expand_once_checks_vars do
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local_macro = 1
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assert local_macro == 1
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quote = {:local_macro, [], nil}
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assert Macro.expand_once(quote, __ENV__) == quote
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end
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defp expand_once_and_clean(quoted, env) do
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cleaner = &Keyword.drop(&1, [:counter])
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quoted
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|> Macro.expand_once(env)
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|> Macro.prewalk(&Macro.update_meta(&1, cleaner))
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end
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test :expand_once_with_imported_macro do
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temp_var = {:x, [], Kernel}
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assert expand_once_and_clean(quote(do: 1 || false), __ENV__) == (quote context: Kernel do
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case 1 do
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unquote(temp_var) when unquote(temp_var) in [false, nil] -> false
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unquote(temp_var) -> unquote(temp_var)
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end
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end)
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end
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test :expand_once_with_require_macro do
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temp_var = {:x, [], Kernel}
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assert expand_once_and_clean(quote(do: Kernel.||(1, false)), __ENV__) == (quote context: Kernel do
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case 1 do
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unquote(temp_var) when unquote(temp_var) in [false, nil] -> false
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unquote(temp_var) -> unquote(temp_var)
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end
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end)
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end
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test :expand_once_with_not_expandable_expression do
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expr = quote(do: other(1, 2, 3))
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assert Macro.expand_once(expr, __ENV__) == expr
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end
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@foo 1
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@bar Macro.expand_once(quote(do: @foo), __ENV__)
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test :expand_once_with_module_at do
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assert @bar == 1
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end
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defp expand_and_clean(quoted, env) do
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cleaner = &Keyword.drop(&1, [:counter])
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quoted
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|> Macro.expand(env)
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|> Macro.prewalk(&Macro.update_meta(&1, cleaner))
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end
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test :expand do
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temp_var = {:x, [], Kernel}
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assert expand_and_clean(quote(do: oror(1, false)), __ENV__) == (quote context: Kernel do
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case 1 do
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unquote(temp_var) when unquote(temp_var) in [false, nil] -> false
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unquote(temp_var) -> unquote(temp_var)
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end
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end)
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end
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test :var do
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assert Macro.var(:foo, nil) == {:foo, [], nil}
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assert Macro.var(:foo, Other) == {:foo, [], Other}
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end
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## to_string
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test :var_to_string do
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assert Macro.to_string(quote do: foo) == "foo"
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end
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test :local_call_to_string do
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assert Macro.to_string(quote do: foo(1, 2, 3)) == "foo(1, 2, 3)"
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assert Macro.to_string(quote do: foo([1, 2, 3])) == "foo([1, 2, 3])"
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end
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test :remote_call_to_string do
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assert Macro.to_string(quote do: foo.bar(1, 2, 3)) == "foo.bar(1, 2, 3)"
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assert Macro.to_string(quote do: foo.bar([1, 2, 3])) == "foo.bar([1, 2, 3])"
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end
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test :low_atom_remote_call_to_string do
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assert Macro.to_string(quote do: :foo.bar(1, 2, 3)) == ":foo.bar(1, 2, 3)"
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end
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test :big_atom_remote_call_to_string do
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assert Macro.to_string(quote do: Foo.Bar.bar(1, 2, 3)) == "Foo.Bar.bar(1, 2, 3)"
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end
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test :remote_and_fun_call_to_string do
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assert Macro.to_string(quote do: foo.bar.(1, 2, 3)) == "foo.bar().(1, 2, 3)"
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assert Macro.to_string(quote do: foo.bar.([1, 2, 3])) == "foo.bar().([1, 2, 3])"
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end
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test :atom_call_to_string do
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assert Macro.to_string(quote do: :foo.(1, 2, 3)) == ":foo.(1, 2, 3)"
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end
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test :aliases_call_to_string do
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assert Macro.to_string(quote do: Foo.Bar.baz(1, 2, 3)) == "Foo.Bar.baz(1, 2, 3)"
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assert Macro.to_string(quote do: Foo.Bar.baz([1, 2, 3])) == "Foo.Bar.baz([1, 2, 3])"
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end
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test :sigil_call_to_string do
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assert Macro.to_string(quote do: ~r"123") == ~s/~r"123"/
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assert Macro.to_string(quote do: ~r"123"u) == ~s/~r"123"u/
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assert Macro.to_string(quote do: ~r"\n123") == ~s/~r"\\\\n123"/
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assert Macro.to_string(quote do: ~R"123") == ~s/~R"123"/
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assert Macro.to_string(quote do: ~R"123"u) == ~s/~R"123"u/
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assert Macro.to_string(quote do: ~R"\n123") == ~s/~R"\\\\n123"/
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end
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test :arrow_to_string do
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assert Macro.to_string(quote do: foo(1, (2 -> 3))) == "foo(1, (2 -> 3))"
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end
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test :blocks_to_string do
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assert Macro.to_string(quote do: (1; 2; (:foo; :bar); 3)) <> "\n" == """
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(
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1
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2
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(
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:foo
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:bar
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)
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3
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)
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"""
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end
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test :if_else_to_string do
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assert Macro.to_string(quote do: (if foo, do: bar, else: baz)) <> "\n" == """
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if(foo) do
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bar
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else
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baz
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end
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"""
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end
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test :case_to_string do
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assert Macro.to_string(quote do: (case foo do true -> 0; false -> (1; 2) end)) <> "\n" == """
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case(foo) do
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true ->
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0
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false ->
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1
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2
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end
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"""
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end
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test :fn_to_string do
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assert Macro.to_string(quote do: (fn -> 1 + 2 end)) == "fn -> 1 + 2 end"
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assert Macro.to_string(quote do: (fn(x) -> x + 1 end)) == "fn x -> x + 1 end"
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assert Macro.to_string(quote do: (fn(x) -> y = x + 1; y end)) <> "\n" == """
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fn x ->
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y = x + 1
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y
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end
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"""
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assert Macro.to_string(quote do: (fn(x) -> y = x + 1; y; (z) -> z end)) <> "\n" == """
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fn
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x ->
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y = x + 1
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y
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z ->
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z
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end
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"""
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end
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test :when do
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assert Macro.to_string(quote do: (() -> x)) == "(() -> x)"
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assert Macro.to_string(quote do: (x when y -> z)) == "(x when y -> z)"
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assert Macro.to_string(quote do: (x, y when z -> w)) == "((x, y) when z -> w)"
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assert Macro.to_string(quote do: ((x, y) when z -> w)) == "((x, y) when z -> w)"
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end
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test :nested_to_string do
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assert Macro.to_string(quote do: (defmodule Foo do def foo do 1 + 1 end end)) <> "\n" == """
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defmodule(Foo) do
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def(foo) do
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1 + 1
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end
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end
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"""
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end
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test :op_precedence_to_string do
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assert Macro.to_string(quote do: (1 + 2) * (3 - 4)) == "(1 + 2) * (3 - 4)"
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assert Macro.to_string(quote do: ((1 + 2) * 3) - 4) == "(1 + 2) * 3 - 4"
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assert Macro.to_string(quote do: (1 + 2 + 3) == "(1 + 2 + 3)")
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assert Macro.to_string(quote do: (1 + 2 - 3) == "(1 + 2 - 3)")
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end
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test :containers_to_string do
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assert Macro.to_string(quote do: {}) == "{}"
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assert Macro.to_string(quote do: []) == "[]"
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assert Macro.to_string(quote do: {1, 2, 3}) == "{1, 2, 3}"
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assert Macro.to_string(quote do: [ 1, 2, 3 ]) == "[1, 2, 3]"
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assert Macro.to_string(quote do: %{}) == "%{}"
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assert Macro.to_string(quote do: %{:foo => :bar}) == "%{foo: :bar}"
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assert Macro.to_string(quote do: %{{1,2} => [1,2,3]}) == "%{{1, 2} => [1, 2, 3]}"
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assert Macro.to_string(quote do: %{map | "a" => "b"}) == "%{map | \"a\" => \"b\"}"
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assert Macro.to_string(quote do: [ 1, 2, 3 ]) == "[1, 2, 3]"
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assert Macro.to_string(quote do: << 1, 2, 3 >>) == "<<1, 2, 3>>"
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assert Macro.to_string(quote do: << <<1>> >>) == "<< <<1>> >>"
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end
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test :struct_to_string do
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assert Macro.to_string(quote do: %Test{}) == "%Test{}"
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assert Macro.to_string(quote do: %Test{foo: 1, bar: 1}) == "%Test{foo: 1, bar: 1}"
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assert Macro.to_string(quote do: %Test{struct | foo: 2}) == "%Test{struct | foo: 2}"
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assert Macro.to_string(quote do: %Test{} + 1) == "%Test{} + 1"
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end
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test :binary_ops_to_string do
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assert Macro.to_string(quote do: 1 + 2) == "1 + 2"
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assert Macro.to_string(quote do: [ 1, 2 | 3 ]) == "[1, 2 | 3]"
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assert Macro.to_string(quote do: [h|t] = [1, 2, 3]) == "[h | t] = [1, 2, 3]"
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assert Macro.to_string(quote do: (x ++ y) ++ z) == "(x ++ y) ++ z"
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end
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test :unary_ops_to_string do
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assert Macro.to_string(quote do: not 1) == "not 1"
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assert Macro.to_string(quote do: not foo) == "not foo"
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assert Macro.to_string(quote do: -1) == "-1"
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assert Macro.to_string(quote do: !(foo > bar)) == "!(foo > bar)"
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assert Macro.to_string(quote do: @foo(bar)) == "@foo(bar)"
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assert Macro.to_string(quote do: identity(&1)) == "identity(&1)"
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assert Macro.to_string(quote do: identity(&foo)) == "identity(&foo)"
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end
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test :access_to_string do
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assert Macro.to_string(quote do: a[b]) == "a[b]"
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assert Macro.to_string(quote do: a[1 + 2]) == "a[1 + 2]"
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end
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test :kw_list do
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assert Macro.to_string(quote do: [a: a, b: b]) == "[a: a, b: b]"
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assert Macro.to_string(quote do: [a: 1, b: 1 + 2]) == "[a: 1, b: 1 + 2]"
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assert Macro.to_string(quote do: ["a.b": 1, c: 1 + 2]) == "[\"a.b\": 1, c: 1 + 2]"
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end
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test :string_list do
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assert Macro.to_string(quote do: []) == "[]"
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assert Macro.to_string(quote do: 'abc') == "'abc'"
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end
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test :last_arg_kw_list do
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assert Macro.to_string(quote do: foo([])) == "foo([])"
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assert Macro.to_string(quote do: foo(x: y)) == "foo(x: y)"
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assert Macro.to_string(quote do: foo(x: 1 + 2)) == "foo(x: 1 + 2)"
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assert Macro.to_string(quote do: foo(x: y, p: q)) == "foo(x: y, p: q)"
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assert Macro.to_string(quote do: foo(a, x: y, p: q)) == "foo(a, x: y, p: q)"
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assert Macro.to_string(quote do: {[]}) == "{[]}"
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assert Macro.to_string(quote do: {[a: b]}) == "{[a: b]}"
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assert Macro.to_string(quote do: {x, a: b}) == "{x, [a: b]}"
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end
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|
test :to_string_with_fun do
|
|
assert Macro.to_string(quote(do: foo(1, 2, 3)), fn _, string -> ":#{string}:" end) ==
|
|
":foo(:1:, :2:, :3:):"
|
|
|
|
assert Macro.to_string(quote(do: Bar.foo(1, 2, 3)), fn _, string -> ":#{string}:" end) ==
|
|
"::Bar:.foo(:1:, :2:, :3:):"
|
|
end
|
|
|
|
## validate
|
|
|
|
test :validate do
|
|
ref = make_ref()
|
|
|
|
assert Macro.validate(1) == :ok
|
|
assert Macro.validate(1.0) == :ok
|
|
assert Macro.validate(:foo) == :ok
|
|
assert Macro.validate("bar") == :ok
|
|
assert Macro.validate(self()) == :ok
|
|
assert Macro.validate({1, 2}) == :ok
|
|
assert Macro.validate({:foo, [], :baz}) == :ok
|
|
assert Macro.validate({:foo, [], []}) == :ok
|
|
assert Macro.validate([1, 2, 3]) == :ok
|
|
|
|
assert Macro.validate(<<0::4>>) == {:error, <<0::4>>}
|
|
assert Macro.validate(ref) == {:error, ref}
|
|
assert Macro.validate({1, ref}) == {:error, ref}
|
|
assert Macro.validate({ref, 2}) == {:error, ref}
|
|
assert Macro.validate([1, ref, 3]) == {:error, ref}
|
|
assert Macro.validate({:foo, [], 0}) == {:error, {:foo, [], 0}}
|
|
assert Macro.validate({:foo, 0, []}) == {:error, {:foo, 0, []}}
|
|
end
|
|
|
|
## decompose_call
|
|
|
|
test :decompose_call do
|
|
assert Macro.decompose_call(quote do: foo) == {:foo, []}
|
|
assert Macro.decompose_call(quote do: foo()) == {:foo, []}
|
|
assert Macro.decompose_call(quote do: foo(1, 2, 3)) == {:foo, [1, 2, 3]}
|
|
assert Macro.decompose_call(quote do: M.N.foo(1, 2, 3)) ==
|
|
{{:__aliases__, [alias: false], [:M, :N]}, :foo, [1, 2, 3]}
|
|
assert Macro.decompose_call(quote do: :foo.foo(1, 2, 3)) ==
|
|
{:foo, :foo, [1, 2, 3]}
|
|
assert Macro.decompose_call(quote do: 1.(1, 2, 3)) == :error
|
|
assert Macro.decompose_call(quote do: "some string") == :error
|
|
end
|
|
|
|
## env
|
|
|
|
test :env_stacktrace do
|
|
env = %{__ENV__ | file: "foo", line: 12}
|
|
assert Macro.Env.stacktrace(env) ==
|
|
[{__MODULE__, :"test env_stacktrace", 1, [file: "foo", line: 12]}]
|
|
|
|
env = %{env | function: nil}
|
|
assert Macro.Env.stacktrace(env) ==
|
|
[{__MODULE__, :__MODULE__, 0, [file: "foo", line: 12]}]
|
|
|
|
env = %{env | module: nil}
|
|
assert Macro.Env.stacktrace(env) ==
|
|
[{:elixir_compiler, :__FILE__, 1, [file: "foo", line: 12]}]
|
|
end
|
|
|
|
test :context_modules do
|
|
defmodule Foo.Bar do
|
|
assert __MODULE__ in __ENV__.context_modules
|
|
end
|
|
end
|
|
|
|
## pipe/unpipe
|
|
|
|
test :pipe do
|
|
assert Macro.pipe(1, quote(do: foo), 0) == quote(do: foo(1))
|
|
assert Macro.pipe(1, quote(do: foo(2)), 0) == quote(do: foo(1, 2))
|
|
assert Macro.pipe(1, quote(do: foo), -1) == quote(do: foo(1))
|
|
assert Macro.pipe(2, quote(do: foo(1)), -1) == quote(do: foo(1, 2))
|
|
|
|
assert_raise ArgumentError, ~r"cannot pipe 1 into 2", fn ->
|
|
Macro.pipe(1, 2, 0)
|
|
end
|
|
end
|
|
|
|
test :unpipe do
|
|
assert Macro.unpipe(quote(do: foo)) == quote(do: [{foo, 0}])
|
|
assert Macro.unpipe(quote(do: foo |> bar)) == quote(do: [{foo, 0}, {bar, 0}])
|
|
assert Macro.unpipe(quote(do: foo |> bar |> baz)) == quote(do: [{foo, 0}, {bar, 0}, {baz, 0}])
|
|
end
|
|
|
|
## pre/postwalk
|
|
|
|
test :prewalk do
|
|
assert prewalk({:foo, [], nil}) ==
|
|
[{:foo, [], nil}]
|
|
|
|
assert prewalk({:foo, [], [1, 2, 3]}) ==
|
|
[{:foo, [], [1, 2, 3]}, 1, 2, 3]
|
|
|
|
assert prewalk({{:., [], [:foo, :bar]}, [], [1, 2, 3]}) ==
|
|
[{{:., [], [:foo, :bar]}, [], [1, 2, 3]}, {:., [], [:foo, :bar]}, :foo, :bar, 1, 2, 3]
|
|
|
|
assert prewalk({[1, 2, 3], [4, 5, 6]}) ==
|
|
[{[1, 2, 3], [4, 5, 6]}, [1, 2, 3], 1, 2, 3, [4, 5, 6], 4, 5, 6]
|
|
end
|
|
|
|
defp prewalk(ast) do
|
|
Macro.prewalk(ast, [], &{&1, [&1|&2]}) |> elem(1) |> Enum.reverse
|
|
end
|
|
|
|
test :postwalk do
|
|
assert postwalk({:foo, [], nil}) ==
|
|
[{:foo, [], nil}]
|
|
|
|
assert postwalk({:foo, [], [1, 2, 3]}) ==
|
|
[1, 2, 3, {:foo, [], [1, 2, 3]}]
|
|
|
|
assert postwalk({{:., [], [:foo, :bar]}, [], [1, 2, 3]}) ==
|
|
[:foo, :bar, {:., [], [:foo, :bar]}, 1, 2, 3, {{:., [], [:foo, :bar]}, [], [1, 2, 3]}]
|
|
|
|
assert postwalk({[1, 2, 3], [4, 5, 6]}) ==
|
|
[1, 2, 3, [1, 2, 3], 4, 5, 6, [4, 5, 6], {[1, 2, 3], [4, 5, 6]}]
|
|
end
|
|
|
|
defp postwalk(ast) do
|
|
Macro.postwalk(ast, [], &{&1, [&1|&2]}) |> elem(1) |> Enum.reverse
|
|
end
|
|
end
|