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Unit tests for non-capturing groups.

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bhandy 2021-06-03 22:30:13 -04:00
parent bf5b25b7a6
commit c03e141781
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core-java-modules/core-java-regex/src/test/java/com/baeldung/regex/NonCapturingGroupUnitTest.java Normal file
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package com.baeldung.regex;
import org.assertj.core.api.Assertions;
import org.junit.jupiter.api.Test;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class NonCapturingGroupUnitTest {
private static final Pattern SIMPLE_URL_PATTERN = Pattern.compile("[^:]+://(?:[.a-z]+/?)+");
private static final Pattern SCOPED_CASE_INSENSITIVE_URL_PATTERN = Pattern.compile("[^:]+://(?i:[.a-z]+/?)+");
private static final Pattern SIMPLE_URL_PATTERN_WITH_SPECIFIC_ENDING_PATH = Pattern.compile("[^:]+://(?:[.a-z]+/?)+?/ending-path");
private static final Pattern SCOPED_CASE_INSENSTIIVE_URL_PATTERN_WITH_ENDING_PATH = Pattern.compile("[^:]://(?i:[.a-z]+/?)+?/ending-path");
private static final Pattern CASE_INSENSITIVE_URL_PATTERN = Pattern.compile("[^:]+://(?:[.a-z]+/?)+?(/ending-path)", Pattern.CASE_INSENSITIVE);
private static final Pattern SCOPED_CASE_SENSITIVE_URL_PATTERN = Pattern.compile("[^:]+://(?-i:[.a-z]+/?)+?(/ending-path)", Pattern.CASE_INSENSITIVE);
private static final Pattern INDEPENDENT_URL_PATTERN_WITH_ENDING_PATH = Pattern.compile("[^:]+://(?>[.a-z]+/?)+/ending-path");
private static final Pattern INDEPENDENT_URL_PATTERN_WITH_ENDING_PATH_AND_BACKTRACKING = Pattern.compile("[^:]+://(?>(?:[.a-z]+/?)+/)ending-path");
@Test
void givenSimpleUrlPattern_whenValidUrlProvided_thenMatches() {
Matcher urlMatcher = SIMPLE_URL_PATTERN.matcher("http://www.microsoft.com/");
Assertions.assertThat(urlMatcher.matches()).isTrue();
Assertions.assertThatThrownBy(() -> urlMatcher.group(1)).isInstanceOf(IndexOutOfBoundsException.class);
}
@Test
void whenSimpleUrlProvidedWithPathProvided_thenMatches() {
Matcher urlMatcher = SIMPLE_URL_PATTERN.matcher("http://www.microsoft.com/live");
Assertions.assertThat(urlMatcher.matches()).isTrue();
}
@Test
void whenSimpleUrlProvidedWithPathEndingWithSlashProvided_thenMatches() {
Matcher urlMatcher = SIMPLE_URL_PATTERN.matcher("http://www.microsoft.com/live/");
Assertions.assertThat(urlMatcher.matches()).isTrue();
}
@Test
void givenSimpleUrlPattern_whenUrlWithMultiplePathSegmentsProvided_thenMatches() {
Matcher urlMatcher = SIMPLE_URL_PATTERN.matcher("http://www.microsoft.com/some/other/url/path");
Assertions.assertThat(urlMatcher.matches()).isTrue();
}
@Test
void whenUrlWithUppercaseCharactersProvided_thenDoesNotMatch() {
Matcher urlMatcher = SIMPLE_URL_PATTERN.matcher("http://www.Microsoft.com/");
Assertions.assertThat(urlMatcher.matches()).isFalse();
}
@Test
void givenPatternWithCaseInsensitiveGroup_whenUrlHasUppercaseCharactersInsideOfScope_thenMatches() {
Matcher urlMatcher = SCOPED_CASE_INSENSITIVE_URL_PATTERN.matcher("http://www.Microsoft.com/");
Assertions.assertThat(urlMatcher.matches()).isTrue();
}
@Test
void givenCaseInsensitivePattern_whenUrlHasUppercaseCharacters_thenMatches() {
Matcher urlMatcher = CASE_INSENSITIVE_URL_PATTERN.matcher("http://www.Microsoft.com/Ending-path");
Assertions.assertThat(urlMatcher.matches()).isTrue();
Assertions.assertThat(urlMatcher.group(1)).isEqualTo("/Ending-path");
}
@Test
void givenPatternWithCaseInsensitiveGroup_whenUrlHasUppercaseCharactersOutsideOfScope_thenMatchFails() {
Matcher urlMatcher = SCOPED_CASE_INSENSTIIVE_URL_PATTERN_WITH_ENDING_PATH.matcher("http://www.Microsoft.com/Ending-path");
Assertions.assertThat(urlMatcher.matches()).isFalse();
}
@Test
void givenPatternAllowingBacktracking_whenUrlWithEndingPathCausingBacktrackingProvided_thenMatches() {
Matcher urlMatcher = SIMPLE_URL_PATTERN_WITH_SPECIFIC_ENDING_PATH.matcher("http://www.microsoft.com/ending-path");
Assertions.assertThat(urlMatcher.matches()).isTrue();
}
@Test
void givenPatternWithIndependentNonCapturingGroup_whenBacktrackingOccurs_thenDoesNotMatch() {
Matcher independentMatcher = INDEPENDENT_URL_PATTERN_WITH_ENDING_PATH.matcher("http://www.microsoft.com/ending-path");
Assertions.assertThat(independentMatcher.matches()).isFalse();
}
@Test
void givenPatternWithIndependentNonCapturingGroup_whenBacktrackingDoesNotOccur_thenMatches() {
Matcher independentMatcher = INDEPENDENT_URL_PATTERN_WITH_ENDING_PATH.matcher("http://www.microsoft.com//ending-path");
Assertions.assertThat(independentMatcher.matches()).isTrue();
}
@Test
void givenPatternWithIndependentNonCapturingGroup_whenBacktrackingOccursInsideGroup_thenMatches() {
Matcher independentMatcher = INDEPENDENT_URL_PATTERN_WITH_ENDING_PATH_AND_BACKTRACKING.matcher("http://www.microsoft.com/ending-path");
Assertions.assertThat(independentMatcher.matches()).isTrue();
}
@Test
void givenCaseInsensitivePatternWithCaseSensitivieSubPattern_whenUrlWithUppercaseCharactersOutsideOfScopeProvided_thenMatches() {
Matcher urlMatcher = SCOPED_CASE_SENSITIVE_URL_PATTERN.matcher("http://www.microsoft.com/ENDING-PATH");
Assertions.assertThat(urlMatcher.matches()).isTrue();
}
@Test
void givenCaseInsensitivePatternWithCaseSensitivieSubPattern_whenUrlWithUppercaseCharactersInsideOfScopeProvided_thenDoesNotMatch() {
Matcher urlMatcher = SCOPED_CASE_SENSITIVE_URL_PATTERN.matcher("http://www.Microsoft.com/ending-path");
Assertions.assertThat(urlMatcher.matches()).isFalse();
}
}