67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
// Copyright 2009 The RE2 Authors. All Rights Reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "util/test.h"
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#include "re2/regexp.h"
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namespace re2 {
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struct PrefixTest {
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const char* regexp;
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bool return_value;
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const char* prefix;
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bool foldcase;
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const char* suffix;
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};
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static PrefixTest tests[] = {
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// If the regexp is missing a ^, there's no required prefix.
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{ "abc", false },
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{ "", false },
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{ "(?m)^", false },
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// If the regexp immediately goes into
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// something not a literal match, there's no required prefix.
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{ "^(abc)", false },
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{ "^a*", false },
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// Otherwise, it should work.
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{ "^abc$", true, "abc", false, "(?-m:$)" },
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{ "^abc", "true", "abc", false, "" },
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{ "^(?i)abc", true, "abc", true, "" },
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{ "^abcd*", true, "abc", false, "d*" },
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{ "^[Aa][Bb]cd*", true, "ab", true, "cd*" },
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{ "^ab[Cc]d*", true, "ab", false, "[Cc]d*" },
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{ "^☺abc", true, "☺abc", false, "" },
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};
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TEST(RequiredPrefix, SimpleTests) {
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for (int i = 0; i < arraysize(tests); i++) {
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const PrefixTest& t = tests[i];
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for (int j = 0; j < 2; j++) {
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Regexp::ParseFlags flags = Regexp::LikePerl;
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if (j == 0)
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flags = flags | Regexp::Latin1;
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Regexp* re = Regexp::Parse(t.regexp, flags, NULL);
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CHECK(re) << " " << t.regexp;
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string p;
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bool f = false;
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Regexp* s = NULL;
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CHECK_EQ(t.return_value, re->RequiredPrefix(&p, &f, &s))
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<< " " << t.regexp << " " << (j==0 ? "latin1" : "utf") << " " << re->Dump();
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if (t.return_value) {
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CHECK_EQ(p, string(t.prefix))
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<< " " << t.regexp << " " << (j==0 ? "latin1" : "utf");
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CHECK_EQ(f, t.foldcase)
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<< " " << t.regexp << " " << (j==0 ? "latin1" : "utf");
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CHECK_EQ(s->ToString(), string(t.suffix))
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<< " " << t.regexp << " " << (j==0 ? "latin1" : "utf");
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s->Decref();
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}
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re->Decref();
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}
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}
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}
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} // namespace re2
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