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Add a Ripper.lex test of :on_embexpr_end

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This is a weird use case of Ripper.lex which I'm not sure is supposed to
be maintained, so I'm adding this test so that we can easily notice such
changes.

If we change the behavior, this will break the behavior of hamlit.gem v1
and code like https://github.com/haml/haml/pull/1043.
This commit is contained in:
Takashi Kokubun 2020-10-19 20:56:08 -07:00
parent a76a30724d
commit 4a7dccf44f
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1 changed files with 7 additions and 0 deletions
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7
test/ripper/test_lexer.rb
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@ -138,4 +138,11 @@ class TestRipper::Lexer < Test::Unit::TestCase
assert_equal pos, code.bytesize
assert_equal expected.size, result.size
end
def test_trailing_on_embexpr_end
# This is useful for scanning a template engine literal `{ foo, bar: baz }`
# whose body inside brackes works like trailing method arguments, like Haml.
token = Ripper.lex("a( foo, bar: baz }").last
assert_equal [[1, 17], :on_embexpr_end, "}", state(:EXPR_ARG)], token
end
end