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add an alphabet method #72

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add an alphabet method #72

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7 changes: 7 additions & 0 deletions src/main/java/ru/lanwen/verbalregex/VerbalExpression.java
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Original file line number Diff line number Diff line change
Expand Up @@ -335,6 +335,13 @@ public Builder nonSpace() {
return this.add("(?:\\S)");
}

/**
* Add alphabet character: [a-zA-Z]
* @return this builder
*/
public Builder alphabet() {
return this.add("(?:[a-zA-Z])");
}

/*
--- / end of predefined character classes
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12 changes: 12 additions & 0 deletions src/test/java/ru/lanwen/verbalregex/PredefinedCharClassesTest.java
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Expand Up @@ -20,6 +20,7 @@ public class PredefinedCharClassesTest {
public static final String DIGITS = "0123456789";
public static final String NON_LETTERS = ";'[]{}|?/";
public static final String SPACE = " \t\n\f\r";
public static final String LETTERS_ONLY_WORD = "q";

@Test
public void testWordChar() throws Exception {
Expand Down Expand Up @@ -97,4 +98,15 @@ public void testWord() throws Exception {
regex.getText(LETTERS_NO_DIGITS + DIGITS + NON_LETTERS + SPACE), is(LETTERS_NO_DIGITS + DIGITS));

}

@Test
public void testAlphabet() throws Exception {
VerbalExpression regex = regex().alphabet().build();

assertThat("matches on letters", regex, matchesTo((LETTERS_ONLY_WORD)));
assertThat("not matches on digit", regex, not(matchesTo(DIGITS)));
assertThat("Extracts wrong chars",
regex.getText(LETTERS_ONLY_WORD + DIGITS + NON_LETTERS + SPACE), equalTo(LETTERS_ONLY_WORD));

}
}