49 lines
942 B
Elixir
49 lines
942 B
Elixir
defmodule BlankAssertions do
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defmacro assert(expr) do
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if contains_blank?(expr) do
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code = Macro.escape(expr)
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quote do
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raise ExUnit.AssertionError, expr: unquote(code)
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end
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else
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quote do
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ExUnit.Assertions.assert(unquote(expr))
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end
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end
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end
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defmacro refute(expr) do
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if contains_blank?(expr) do
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code = Macro.escape(expr)
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quote do
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raise ExUnit.AssertionError, expr: unquote(code)
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end
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else
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quote do
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ExUnit.Assertions.refute(unquote(expr))
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end
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end
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end
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def assert(value, opts) do
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ExUnit.Assertions.assert(value, opts)
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end
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defp contains_blank?(expr) do
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{_, blank} = Macro.prewalk(expr, false, &blank?/2)
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blank
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end
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defp blank?(node, true) do
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{node, true}
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end
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defp blank?({expr, _, _} = node, _acc) do
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{node, expr == :__}
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end
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defp blank?(expr, _acc) do
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{expr, expr == :__}
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end
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end
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