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Moved regex from own module to core-java (#707) 

* made changes to java reflection

* removed redundant method makeSound in Animal abstract class

* added project for play-framework article

* added project for regex

* changed regex project from own model to core-java
This commit is contained in:
Egima profile 2016-09-29 00:43:59 +03:00 committed by Grzegorz Piwowarek
parent e1ffd14c0d
commit f3b8bb0f14
2 changed files with 530 additions and 0 deletions
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27
core-java/src/main/java/com/baeldung/java/regex/Result.java Normal file
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package com.baeldung.java.regex;
public class Result {
private boolean found = false;
private int count = 0;
public Result() {
}
public boolean isFound() {
return found;
}
public void setFound(boolean found) {
this.found = found;
}
public int getCount() {
return count;
}
public void setCount(int count) {
this.count = count;
}
}

503
core-java/src/test/java/com/baeldung/java/regex/RegexTest.java Normal file
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package com.baeldung.java.regex;
import static org.junit.Assert.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.junit.Test;
public class RegexTest {
private static Pattern pattern;
private static Matcher matcher;
@Test
public void givenText_whenSimpleRegexMatches_thenCorrect() {
Result result = runTest("foo", "foo");
assertTrue(result.isFound());
assertEquals(result.getCount(), 1);
}
@Test
public void givenText_whenSimpleRegexMatchesTwice_thenCorrect() {
Result result = runTest("foo", "foofoo");
assertTrue(result.isFound());
assertEquals(result.getCount(), 2);
}
@Test
public void givenText_whenMatchesWithDotMetach_thenCorrect() {
Result result = runTest(".", "foo");
assertTrue(result.isFound());
}
@Test
public void givenRepeatedText_whenMatchesOnceWithDotMetach_thenCorrect() {
Result result = runTest("foo.", "foofoo");
assertTrue(result.isFound());
assertEquals(result.getCount(), 1);
}
@Test
public void givenORSet_whenMatchesAny_thenCorrect() {
Result result = runTest("[abc]", "b");
assertTrue(result.isFound());
assertEquals(result.getCount(), 1);
}
@Test
public void givenORSet_whenMatchesAnyAndAll_thenCorrect() {
Result result = runTest("[abc]", "cab");
assertTrue(result.isFound());
assertEquals(result.getCount(), 3);
}
@Test
public void givenORSet_whenMatchesAllCombinations_thenCorrect() {
Result result = runTest("[bcr]at", "bat cat rat");
assertTrue(result.isFound());
assertEquals(result.getCount(), 3);
}
@Test
public void givenNORSet_whenMatchesNon_thenCorrect() {
Result result = runTest("[^abc]", "g");
assertTrue(result.isFound());
}
@Test
public void givenNORSet_whenMatchesAllExceptElements_thenCorrect() {
Result result = runTest("[^bcr]at", "sat mat eat");
assertTrue(result.isFound());
}
@Test
public void givenUpperCaseRange_whenMatchesUpperCase_thenCorrect() {
Result result = runTest("[A-Z]", "Two Uppercase alphabets 34 overall");
assertTrue(result.isFound());
assertEquals(result.getCount(), 2);
}
@Test
public void givenLowerCaseRange_whenMatchesLowerCase_thenCorrect() {
Result result = runTest("[a-z]", "Two Uppercase alphabets 34 overall");
assertTrue(result.isFound());
assertEquals(result.getCount(), 26);
}
@Test
public void givenBothLowerAndUpperCaseRange_whenMatchesAllLetters_thenCorrect() {
Result result = runTest("[a-zA-Z]", "Two Uppercase alphabets 34 overall");
assertTrue(result.isFound());
assertEquals(result.getCount(), 28);
}
@Test
public void givenNumberRange_whenMatchesAccurately_thenCorrect() {
Result result = runTest("[1-5]", "Two Uppercase alphabets 34 overall");
assertTrue(result.isFound());
assertEquals(result.getCount(), 2);
}
@Test
public void givenNumberRange_whenMatchesAccurately_thenCorrect2() {
Result result = runTest("[30-35]", "Two Uppercase alphabets 34 overall");
assertTrue(result.isFound());
assertEquals(result.getCount(), 1);
}
@Test
public void givenTwoSets_whenMatchesUnion_thenCorrect() {
Result result = runTest("[1-3[7-9]]", "123456789");
assertTrue(result.isFound());
assertEquals(result.getCount(), 6);
}
@Test
public void givenTwoSets_whenMatchesIntersection_thenCorrect() {
Result result = runTest("[1-6&&[3-9]]", "123456789");
assertTrue(result.isFound());
assertEquals(result.getCount(), 4);
}
@Test
public void givenSetWithSubtraction_whenMatchesAccurately_thenCorrect() {
Result result = runTest("[0-9&&[^2468]]", "123456789");
assertTrue(result.isFound());
assertEquals(result.getCount(), 5);
}
@Test
public void givenDigits_whenMatches_thenCorrect() {
Result result = runTest("\\d", "123");
assertTrue(result.isFound());
assertEquals(result.getCount(), 3);
}
@Test
public void givenNonDigits_whenMatches_thenCorrect() {
Result result = runTest("\\D", "a6c");
assertTrue(result.isFound());
assertEquals(result.getCount(), 2);
}
@Test
public void givenWhiteSpace_whenMatches_thenCorrect() {
Result result = runTest("\\s", "a c");
assertTrue(result.isFound());
assertEquals(result.getCount(), 1);
}
@Test
public void givenNonWhiteSpace_whenMatches_thenCorrect() {
Result result = runTest("\\S", "a c");
assertTrue(result.isFound());
assertEquals(result.getCount(), 2);
}
@Test
public void givenWordCharacter_whenMatches_thenCorrect() {
Result result = runTest("\\w", "hi!");
assertTrue(result.isFound());
assertEquals(result.getCount(), 2);
}
@Test
public void givenNonWordCharacter_whenMatches_thenCorrect() {
Result result = runTest("\\W", "hi!");
assertTrue(result.isFound());
assertEquals(result.getCount(), 1);
}
@Test
public void givenZeroOrOneQuantifier_whenMatches_thenCorrect() {
Result result = runTest("\\a?", "hi");
assertTrue(result.isFound());
assertEquals(result.getCount(), 3);
}
@Test
public void givenZeroOrOneQuantifier_whenMatches_thenCorrect2() {
Result result = runTest("\\a{0,1}", "hi");
assertTrue(result.isFound());
assertEquals(result.getCount(), 3);
}
@Test
public void givenZeroOrManyQuantifier_whenMatches_thenCorrect() {
Result result = runTest("\\a*", "hi");
assertTrue(result.isFound());
assertEquals(result.getCount(), 3);
}
@Test
public void givenZeroOrManyQuantifier_whenMatches_thenCorrect2() {
Result result = runTest("\\a{0,}", "hi");
assertTrue(result.isFound());
assertEquals(result.getCount(), 3);
}
@Test
public void givenOneOrManyQuantifier_whenMatches_thenCorrect() {
Result result = runTest("\\a+", "hi");
assertFalse(result.isFound());
}
@Test
public void givenOneOrManyQuantifier_whenMatches_thenCorrect2() {
Result result = runTest("\\a{1,}", "hi");
assertFalse(result.isFound());
}
@Test
public void givenBraceQuantifier_whenMatches_thenCorrect() {
Result result = runTest("a{3}", "aaaaaa");
assertTrue(result.isFound());
assertEquals(result.getCount(), 2);
}
@Test
public void givenBraceQuantifier_whenFailsToMatch_thenCorrect() {
Result result = runTest("a{3}", "aa");
assertFalse(result.isFound());
}
@Test
public void givenBraceQuantifierWithRange_whenMatches_thenCorrect() {
Result result = runTest("a{2,3}", "aaaa");
assertTrue(result.isFound());
assertEquals(result.getCount(), 1);
}
@Test
public void givenBraceQuantifierWithRange_whenMatchesLazily_thenCorrect() {
Result result = runTest("a{2,3}?", "aaaa");
assertTrue(result.isFound());
assertEquals(result.getCount(), 2);
}
@Test
public void givenCapturingGroup_whenMatches_thenCorrect() {
Result result = runTest("(\\d\\d)", "12");
assertTrue(result.isFound());
assertEquals(result.getCount(), 1);
}
@Test
public void givenCapturingGroup_whenMatches_thenCorrect2() {
Result result = runTest("(\\d\\d)", "1212");
assertTrue(result.isFound());
assertEquals(result.getCount(), 2);
}
@Test
public void givenCapturingGroup_whenMatches_thenCorrect3() {
Result result = runTest("(\\d\\d)(\\d\\d)", "1212");
assertTrue(result.isFound());
assertEquals(result.getCount(), 1);
}
@Test
public void givenCapturingGroup_whenMatchesWithBackReference_thenCorrect() {
Result result = runTest("(\\d\\d)\\1", "1212");
assertTrue(result.isFound());
assertEquals(result.getCount(), 1);
}
@Test
public void givenCapturingGroup_whenMatchesWithBackReference_thenCorrect2() {
Result result = runTest("(\\d\\d)\\1\\1\\1", "12121212");
assertTrue(result.isFound());
assertEquals(result.getCount(), 1);
}
@Test
public void givenCapturingGroupAndWrongInput_whenMatchFailsWithBackReference_thenCorrect() {
Result result = runTest("(\\d\\d)\\1", "1213");
assertFalse(result.isFound());
}
@Test
public void givenText_whenMatchesAtBeginning_thenCorrect() {
Result result = runTest("^dog", "dogs are friendly");
assertTrue(result.isFound());
}
@Test
public void givenTextAndWrongInput_whenMatchFailsAtBeginning_thenCorrect() {
Result result = runTest("^dog", "are dogs are friendly?");
assertFalse(result.isFound());
}
@Test
public void givenText_whenMatchesAtEnd_thenCorrect() {
Result result = runTest("dog$", "Man's best friend is a dog");
assertTrue(result.isFound());
}
@Test
public void givenTextAndWrongInput_whenMatchFailsAtEnd_thenCorrect() {
Result result = runTest("dog$", "is a dog man's best friend?");
assertFalse(result.isFound());
}
@Test
public void givenText_whenMatchesAtWordBoundary_thenCorrect() {
Result result = runTest("\\bdog\\b", "a dog is friendly");
assertTrue(result.isFound());
}
@Test
public void givenText_whenMatchesAtWordBoundary_thenCorrect2() {
Result result = runTest("\\bdog\\b", "dog is man's best friend");
assertTrue(result.isFound());
}
@Test
public void givenWrongText_whenMatchFailsAtWordBoundary_thenCorrect() {
Result result = runTest("\\bdog\\b", "snoop dogg is a rapper");
assertFalse(result.isFound());
}
@Test
public void givenText_whenMatchesAtWordAndNonBoundary_thenCorrect() {
Result result = runTest("\\bdog\\B", "snoop dogg is a rapper");
assertTrue(result.isFound());
}
@Test
public void givenRegexWithoutCanonEq_whenMatchFailsOnEquivalentUnicode_thenCorrect() {
Result result = runTest("\u00E9", "\u0065\u0301");
assertFalse(result.isFound());
}
@Test
public void givenRegexWithCanonEq_whenMatchesOnEquivalentUnicode_thenCorrect() {
Result result = runTest("\u00E9", "\u0065\u0301", Pattern.CANON_EQ);
assertTrue(result.isFound());
}
@Test
public void givenRegexWithDefaultMatcher_whenMatchFailsOnDifferentCases_thenCorrect() {
Result result = runTest("dog", "This is a Dog");
assertFalse(result.isFound());
}
@Test
public void givenRegexWithCaseInsensitiveMatcher_whenMatchesOnDifferentCases_thenCorrect() {
Result result = runTest("dog", "This is a Dog", Pattern.CASE_INSENSITIVE);
assertTrue(result.isFound());
}
@Test
public void givenRegexWithEmbeddedCaseInsensitiveMatcher_whenMatchesOnDifferentCases_thenCorrect() {
Result result = runTest("(?i)dog", "This is a Dog");
assertTrue(result.isFound());
}
@Test
public void givenRegexWithComments_whenMatchFailsWithoutFlag_thenCorrect() {
Result result = runTest("dog$ #check for word dog at end of text", "This is a dog");
assertFalse(result.isFound());
}
@Test
public void givenRegexWithComments_whenMatchesWithFlag_thenCorrect() {
Result result = runTest("dog$ #check for word dog at end of text", "This is a dog", Pattern.COMMENTS);
assertTrue(result.isFound());
}
@Test
public void givenRegexWithComments_whenMatchesWithEmbeddedFlag_thenCorrect() {
Result result = runTest("(?x)dog$ #check for word dog at end of text", "This is a dog");
assertTrue(result.isFound());
}
@Test
public void givenRegexWithLineTerminator_whenMatchFails_thenCorrect() {
Pattern pattern = Pattern.compile("(.*)");
Matcher matcher = pattern.matcher("this is a text" + System.getProperty("line.separator") + " continued on another line");
matcher.find();
assertEquals("this is a text", matcher.group(1));
}
@Test
public void givenRegexWithLineTerminator_whenMatchesWithDotall_thenCorrect() {
Pattern pattern = Pattern.compile("(.*)", Pattern.DOTALL);
Matcher matcher = pattern.matcher("this is a text" + System.getProperty("line.separator") + " continued on another line");
matcher.find();
assertEquals("this is a text" + System.getProperty("line.separator") + " continued on another line", matcher.group(1));
}
@Test
public void givenRegexWithLineTerminator_whenMatchesWithEmbeddedDotall_thenCorrect() {
Pattern pattern = Pattern.compile("(?s)(.*)");
Matcher matcher = pattern.matcher("this is a text" + System.getProperty("line.separator") + " continued on another line");
matcher.find();
assertEquals("this is a text" + System.getProperty("line.separator") + " continued on another line", matcher.group(1));
}
@Test
public void givenRegex_whenMatchesWithoutLiteralFlag_thenCorrect() {
Result result = runTest("(.*)", "text");
assertTrue(result.isFound());
}
@Test
public void givenRegex_whenMatchFailsWithLiteralFlag_thenCorrect() {
Result result = runTest("(.*)", "text", Pattern.LITERAL);
assertFalse(result.isFound());
}
@Test
public void givenRegex_whenMatchesWithLiteralFlag_thenCorrect() {
Result result = runTest("(.*)", "text(.*)", Pattern.LITERAL);
assertTrue(result.isFound());
}
@Test
public void givenRegex_whenMatchFailsWithoutMultilineFlag_thenCorrect() {
Result result = runTest("dog$", "This is a dog" + System.getProperty("line.separator") + "this is a fox");
assertFalse(result.isFound());
}
@Test
public void givenRegex_whenMatchesWithMultilineFlag_thenCorrect() {
Result result = runTest("dog$", "This is a dog" + System.getProperty("line.separator") + "this is a fox", Pattern.MULTILINE);
assertTrue(result.isFound());
}
@Test
public void givenRegex_whenMatchesWithEmbeddedMultilineFlag_thenCorrect() {
Result result = runTest("(?m)dog$", "This is a dog" + System.getProperty("line.separator") + "this is a fox");
assertTrue(result.isFound());
}
@Test
public void givenMatch_whenGetsIndices_thenCorrect() {
Pattern pattern = Pattern.compile("dog");
Matcher matcher = pattern.matcher("This dog is mine");
matcher.find();
assertEquals(5, matcher.start());
assertEquals(8, matcher.end());
}
@Test
public void whenStudyMethodsWork_thenCorrect() {
Pattern pattern = Pattern.compile("dog");
Matcher matcher = pattern.matcher("dogs are friendly");
assertTrue(matcher.lookingAt());
assertFalse(matcher.matches());
}
@Test
public void whenMatchesStudyMethodWorks_thenCorrect() {
Pattern pattern = Pattern.compile("dog");
Matcher matcher = pattern.matcher("dog");
assertTrue(matcher.matches());
}
@Test
public void whenReplaceFirstWorks_thenCorrect() {
Pattern pattern = Pattern.compile("dog");
Matcher matcher = pattern.matcher("dogs are domestic animals, dogs are friendly");
String newStr = matcher.replaceFirst("cat");
assertEquals("cats are domestic animals, dogs are friendly", newStr);
}
@Test
public void whenReplaceAllWorks_thenCorrect() {
Pattern pattern = Pattern.compile("dog");
Matcher matcher = pattern.matcher("dogs are domestic animals, dogs are friendly");
String newStr = matcher.replaceAll("cat");
assertEquals("cats are domestic animals, cats are friendly", newStr);
}
public synchronized static Result runTest(String regex, String text) {
pattern = Pattern.compile(regex);
matcher = pattern.matcher(text);
Result result = new Result();
while (matcher.find())
result.setCount(result.getCount() + 1);
if (result.getCount() > 0)
result.setFound(true);
return result;
}
public synchronized static Result runTest(String regex, String text, int flags) {
pattern = Pattern.compile(regex, flags);
matcher = pattern.matcher(text);
Result result = new Result();
while (matcher.find())
result.setCount(result.getCount() + 1);
if (result.getCount() > 0)
result.setFound(true);
return result;
}
}