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grep: add a test for backreferences in PCRE patterns
Add a test for backreferences such as (.)\1 in PCRE patterns. This test ensures that the PCRE_NO_AUTO_CAPTURE option isn't turned on. Before this change turning it on would break these sort of patterns, but wouldn't break any tests. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -1114,6 +1114,13 @@ test_expect_success PCRE 'grep -P -w pattern' '
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test_cmp expected actual
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'
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test_expect_success PCRE 'grep -P backreferences work (the PCRE NO_AUTO_CAPTURE flag is not set)' '
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git grep -P -h "(?P<one>.)(?P=one)" hello_world >actual &&
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test_cmp hello_world actual &&
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git grep -P -h "(.)\1" hello_world >actual &&
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test_cmp hello_world actual
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'
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test_expect_success 'grep -G invalidpattern properly dies ' '
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test_must_fail git grep -G "a["
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'
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