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fix: Strainer.add_filter method

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chenxianyu
2017-02-13 15:50:19 +08:00
parent b1ef28566e
commit aa79c33dda
2 changed files with 10 additions and 1 deletions
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9
test/unit/strainer_unit_test.rb
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@@ -145,4 +145,13 @@ class StrainerUnitTest < Minitest::Test
Strainer.global_filter(LateAddedFilter)
assert_equal 'filtered', Strainer.create(nil).invoke('late_added_filter', 'input')
end
def test_add_filter_returns_nil_when_a_filter_module_was_added
a = Module.new
strainer = Context.new.strainer
result1 = strainer.class.add_filter(a)
result2 = strainer.class.add_filter(a)
assert_kind_of Set, result1
assert_kind_of NilClass, result2
end
end # StrainerTest