@Test
public void testEqualsWithSamePatternButDiffFlagsGetsFalse() {
Pattern p1 = Pattern.compile("(a)(b)(?:c)(?<named>x)");
Pattern p2 =
Pattern.compile("(a)(b)(?:c)(?<named>x)", java.util.regex.Pattern.CASE_INSENSITIVE);
assertFalse(p1.equals(p2));
}
@Test
public void testStandardPatternGetsOrigWithoutNamed() {
final String ORIG_PATT = "(a)(b)(?:c)(?<named>x)";
final String PATT_W_NO_NAMED_GRPS = "(a)(b)(?:c)(x)";
Pattern p = Pattern.compile(ORIG_PATT);
assertEquals(PATT_W_NO_NAMED_GRPS, p.standardPattern());
}
@Test
public void testIndexOfWithInvalidPositiveInstanceIndex() {
Pattern p = Pattern.compile("(a)(?<named>x)(b)(?:c)(?<named>y)");
thrown.expect(IndexOutOfBoundsException.class);
thrown.expectMessage("Index: 10000000, Size: 2");
assertEquals(-1, p.indexOf("named", 10000000));
}
@Test
public void testIndexOfNamedGroupContainingSpecialConstruct() {
Pattern p =
Pattern.compile(
"\\d{2}/\\d{2}/\\d{4}: EXCEPTION - (?<exception>(?s)(.+(?:Exception|Error)[^\\n]+(?:\\s++at [^\\n]+)++)(?:\\s*\\.{3}[^\\n]++)?\\s*)\\n");
assertEquals(0, p.indexOf("exception"));
}
public void testInvalidGroup(String text, String regexp, int group) {
Pattern p = Pattern.compile(regexp, options);
Matcher m = p.matcher(utf8Slice(text));
m.find();
m.group(group);
fail(); // supposed to have exception by now
}
@Test
public void testCompileWithUnknownBackref() {
thrown.expect(PatternSyntaxException.class);
thrown.expectMessage(
"unknown group name near index 11\n" + "(xyz)abc\\k<bar>\n" + " ^");
Pattern.compile("(?<foo>xyz)abc\\k<bar>");
}
public void testGroup(String text, String regexp, String[] output) {
// RE2
Pattern p = Pattern.compile(regexp, options);
Matcher matchString = p.matcher(utf8Slice(text));
assertEquals(true, matchString.find());
assertEquals(utf8Slice(output[0]), matchString.group());
for (int i = 0; i < output.length; i++) {
assertEquals(output[i] == null ? null : utf8Slice(output[i]), matchString.group(i));
}
assertEquals(output.length - 1, matchString.groupCount());
// JDK
java.util.regex.Pattern pj = java.util.regex.Pattern.compile(regexp);
java.util.regex.Matcher matchStringj = pj.matcher(text);
// java.util.regex.Matcher matchBytes =
// p.matcher(text.getBytes(Charsets.UTF_8));
assertEquals(true, matchStringj.find());
// assertEquals(true, matchBytes.find());
assertEquals(output[0], matchStringj.group());
// assertEquals(output[0], matchBytes.group());
for (int i = 0; i < output.length; i++) {
assertEquals(output[i], matchStringj.group(i));
// assertEquals(output[i], matchBytes.group(i));
}
}
@Test
public void testGroupInfoMapHasCorrectPosAndGroupIndex() {
final String PATT = "(foo)(?<X>a)(?<Y>b)(bar)(?<Z>c)(?<Z>d)"; // two groups named "Z"
Pattern p = Pattern.compile(PATT);
Map<String, List<GroupInfo>> map = p.groupInfo();
assertNotNull(map);
GroupInfo[] inf = (GroupInfo[]) map.get("X").toArray(new GroupInfo[0]);
assertEquals(1, inf.length);
assertEquals(PATT.indexOf("(?<X>"), inf[0].pos());
assertEquals(1, inf[0].groupIndex());
GroupInfo[] inf2 = (GroupInfo[]) map.get("Y").toArray(new GroupInfo[0]);
assertEquals(1, inf2.length);
assertEquals(PATT.indexOf("(?<Y>"), inf2[0].pos());
assertEquals(2, inf2[0].groupIndex());
// test both Z groups
GroupInfo[] inf3 = (GroupInfo[]) map.get("Z").toArray(new GroupInfo[0]);
assertEquals(2, inf3.length);
int posZ = PATT.indexOf("(?<Z>");
assertEquals(posZ, inf3[0].pos());
assertEquals(4, inf3[0].groupIndex());
assertEquals(PATT.indexOf("(?<Z>", posZ + 1), inf3[1].pos());
assertEquals(5, inf3[1].groupIndex());
}
@Test
public void testCompileRegexWithFlags() {
final String PATT = "(?<name>abc) # comment 1";
int flags = java.util.regex.Pattern.CASE_INSENSITIVE | java.util.regex.Pattern.COMMENTS;
Pattern p = Pattern.compile(PATT, flags);
assertEquals(PATT, p.namedPattern());
assertEquals(flags, p.flags());
}
@Test
public void testSplitGetsArrayOfTextAroundMatches() {
Pattern p = Pattern.compile("(a)(b)(?:c)(?<named>x)");
assertArrayEquals(new String[] {"foo ", " bar "}, p.split("foo abcx bar abcx"));
// when the limit is specified, the last element contains
// the remainder of the string
assertArrayEquals(new String[] {"foo ", " bar abcx"}, p.split("foo abcx bar abcx", 2));
}
@Test
public void testIndexOfNamedGroupAfterNonEscapedParenAfterEscapedOpenBracket() {
// since the open-bracket is escaped, it doesn't create a character class,
// so the parentheses inside the "foo" group is a capturing group (that
// currently captures nothing but still valid regex and thus counted)
Pattern p = Pattern.compile("(a)(?<foo>\\[()])(?:c)(?<named>x)");
assertEquals(3, p.indexOf("named"));
}
@Test
public void testCompileBackrefTakesFirstClosingAngleBracket() {
String GROUP_NAME = "foo bar >";
Pattern p = Pattern.compile("(?<foo>xyz)(?<" + GROUP_NAME + ">\\d+)abc\\k<" + GROUP_NAME + ">");
// The first closing bracket encountered is used. The second becomes a literal,
// so we check for it in the standard pattern (two actually).
assertEquals("(xyz)(>\\d+)abc\\2>", p.standardPattern());
}
@Test
public void testTakesPatternWithEscapedEscape() {
// it looks like an escaped parenthesis, but the escape char is
// itself escaped and is thus a literal
final String PATT = "\\\\(?<name>abc)";
Pattern p = Pattern.compile(PATT);
assertEquals("\\\\(abc)", p.standardPattern());
}
@Test
public void testIndexOfWithInvalidNegativeInstanceIndex() {
Pattern p = Pattern.compile("(a)(?<named>x)(b)(?:c)(?<named>y)");
// Negative index causes ArrayIndexOutOfBoundsException (which
// is a subclass of IndexOutOfBoundsException)
thrown.expect(ArrayIndexOutOfBoundsException.class);
thrown.expectMessage("-100");
assertEquals(-1, p.indexOf("named", -100));
}
@Test
public void testGroupNames() {
final String PATT = "(foo)(?<X>a)(?<Y>b)(?<Z>c)(bar)";
Pattern p = Pattern.compile(PATT);
assertNotNull(p.groupNames());
assertEquals(3, p.groupNames().size());
assertEquals("X", p.groupNames().get(0));
assertEquals("Y", p.groupNames().get(1));
assertEquals("Z", p.groupNames().get(2));
}
public void testMatcherMatches(String regexp, String match) {
java.util.regex.Pattern p = java.util.regex.Pattern.compile(regexp);
assertTrue(
"JDK Pattern with regexp: " + regexp + " doesn't match: " + match,
p.matcher(match).matches());
Pattern pr = Pattern.compile(regexp, options);
assertTrue(
"Pattern with regexp: " + regexp + " doesn't match: " + match,
pr.matcher(utf8Slice(match)).matches());
}
public void testMatcherNotMatches(String regexp, String nonMatch) {
java.util.regex.Pattern p = java.util.regex.Pattern.compile(regexp);
assertFalse(
"JDK Pattern with regexp: " + regexp + " matches: " + nonMatch,
p.matcher(nonMatch).matches());
Pattern pr = Pattern.compile(regexp, options);
assertFalse(
"Pattern with regexp: " + regexp + " matches: " + nonMatch,
pr.matcher(utf8Slice(nonMatch)).matches());
}
@Test
public void testGroupInfoMapHasNamesAsKeys() {
final String PATT = "(foo)(?<X>a)(?<Y>b)(bar)(?<Z>c)(?<Z>d)"; // two groups named "Z"
Pattern p = Pattern.compile(PATT);
Map<String, List<GroupInfo>> map = p.groupInfo();
assertNotNull(map);
assertEquals(3, map.size());
assertTrue(map.containsKey("X"));
assertTrue(map.containsKey("Y"));
assertTrue(map.containsKey("Z"));
}
// Tests that both RE2 and JDK's Matchers do the same replaceFist.
public void testReplaceFirst(String orig, String regex, String repl, String actual) {
Pattern p = Pattern.compile(regex, options);
Matcher m = p.matcher(utf8Slice(orig));
String replaced = m.replaceFirst(utf8Slice(repl)).toStringUtf8();
assertEquals(actual, replaced);
// JDK's
java.util.regex.Pattern pj = java.util.regex.Pattern.compile(regex);
java.util.regex.Matcher mj = pj.matcher(orig);
replaced = mj.replaceFirst(repl);
assertEquals(actual, replaced);
}
// Tests that both RE2 and JDK's Patterns/Matchers give the same groupCount.
public void testGroupCount(String pattern, int count) {
// RE2
Pattern p = Pattern.compile(pattern, options);
Matcher m = p.matcher(utf8Slice("x"));
assertEquals(count, p.groupCount());
assertEquals(count, m.groupCount());
// JDK
java.util.regex.Pattern pj = java.util.regex.Pattern.compile(pattern);
java.util.regex.Matcher mj = pj.matcher("x");
// java.util.regex.Pattern doesn't have group count in JDK.
assertEquals(count, mj.groupCount());
}
public void testFindNoMatch(String text, String regexp, int start) {
// RE2
Pattern p = Pattern.compile(regexp, options);
Matcher matchString = p.matcher(utf8Slice(text));
// RE2Matcher matchBytes = p.matcher(text.getBytes(Charsets.UTF_8));
assertFalse(matchString.find(start));
// assertFalse(matchBytes.find(start));
// JDK
java.util.regex.Pattern pj = java.util.regex.Pattern.compile(regexp);
java.util.regex.Matcher matchStringj = pj.matcher(text);
assertFalse(matchStringj.find(start));
}
public void testFind(String text, String regexp, int start, String output) {
// RE2
Pattern p = Pattern.compile(regexp, options);
Matcher matchString = p.matcher(utf8Slice(text));
assertTrue(matchString.find(start));
assertEquals(utf8Slice(output), matchString.group());
assertTrue(p.find(utf8Slice(text)));
// JDK
java.util.regex.Pattern pj = java.util.regex.Pattern.compile(regexp);
java.util.regex.Matcher matchStringj = pj.matcher(text);
assertTrue(matchStringj.find(start));
assertEquals(output, matchStringj.group());
}
@Test
public void testIndexOfNamedGroupAfterAnotherNamedGroup() {
Pattern p = Pattern.compile("(a)(?<foo>)(?:c)(?<named>x)");
assertEquals(2, p.indexOf("named"));
}
@Test
public void testIndexOfNamedGroupAfterUnnamedAndNoncaptureGroups() {
Pattern p = Pattern.compile("(a)(b)(?:c)(?<named>x)");
assertEquals(2, p.indexOf("named"));
}
@Test
public void testIndexOfNamedGroup() {
Pattern p = Pattern.compile("(?<named>x)");
assertEquals(0, p.indexOf("named"));
}
@Test
public void testIndexOfNameWithUnicodeChars() {
Pattern p = Pattern.compile("(?<gefräßig>x)");
assertEquals(0, p.indexOf("gefräßig"));
}
@Test
public void testIndexOfAcceptsNameWithNewLines() {
Pattern p = Pattern.compile("(?<Lorem ipsum dolor sit amet,\n consectetur adipisicing elit>x)");
assertEquals(0, p.indexOf("Lorem ipsum dolor sit amet,\n consectetur adipisicing elit"));
}
@Test
public void testIndexOfAcceptsNameWithClosingAngleBracket() {
Pattern p = Pattern.compile("(?<foo bar > should not grab this bracket> x)");
assertEquals(0, p.indexOf("foo bar "));
}
@Test
public void testCompileBackrefAcceptsNameWithUnicodeChars() {
String GROUP_NAME = "gefräßig";
Pattern p = Pattern.compile("(?<foo>xyz)(?<" + GROUP_NAME + ">\\d+)abc\\k<" + GROUP_NAME + ">");
assertEquals("(xyz)(\\d+)abc\\2", p.standardPattern());
}
@Test
public void testCompileBackrefAcceptsNameWithNewLines() {
String GROUP_NAME = "Lorem ipsum dolor sit amet,\n consectetur adipisicing elit";
Pattern p = Pattern.compile("(?<foo>xyz)(?<" + GROUP_NAME + ">\\d+)abc\\k<" + GROUP_NAME + ">");
assertEquals("(xyz)(\\d+)abc\\2", p.standardPattern());
}