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/*
* Copyright (C) 2010 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.common.base;
import junit.framework.TestCase;
/**
* Unit test for {@link Strings}.
*
* @author Kevin Bourrillion
*/
public class StringsTest extends TestCase {
public void testNullToEmpty() {
assertEquals("", Strings.nullToEmpty(null));
assertEquals("", Strings.nullToEmpty(""));
assertEquals("a", Strings.nullToEmpty("a"));
}
public void testEmptyToNull() {
assertNull(Strings.emptyToNull(null));
assertNull(Strings.emptyToNull(""));
assertEquals("a", Strings.emptyToNull("a"));
}
public void testIsNullOrEmpty() {
assertTrue(Strings.isNullOrEmpty(null));
assertTrue(Strings.isNullOrEmpty(""));
assertFalse(Strings.isNullOrEmpty("a"));
}
public void testPadStart_noPadding() {
assertSame("", Strings.padStart("", 0, '-'));
assertSame("x", Strings.padStart("x", 0, '-'));
assertSame("x", Strings.padStart("x", 1, '-'));
assertSame("xx", Strings.padStart("xx", 0, '-'));
assertSame("xx", Strings.padStart("xx", 2, '-'));
}
public void testPadStart_somePadding() {
assertEquals("-", Strings.padStart("", 1, '-'));
assertEquals("--", Strings.padStart("", 2, '-'));
assertEquals("-x", Strings.padStart("x", 2, '-'));
assertEquals("--x", Strings.padStart("x", 3, '-'));
assertEquals("-xx", Strings.padStart("xx", 3, '-'));
}
public void testPadStart_negativeMinLength() {
assertSame("x", Strings.padStart("x", -1, '-'));
}
// TODO: could remove if we got NPT working in GWT somehow
public void testPadStart_null() {
try {
Strings.padStart(null, 5, '0');
fail();
} catch (NullPointerException expected) {
}
}
public void testPadEnd_noPadding() {
assertSame("", Strings.padEnd("", 0, '-'));
assertSame("x", Strings.padEnd("x", 0, '-'));
assertSame("x", Strings.padEnd("x", 1, '-'));
assertSame("xx", Strings.padEnd("xx", 0, '-'));
assertSame("xx", Strings.padEnd("xx", 2, '-'));
}
public void testPadEnd_somePadding() {
assertEquals("-", Strings.padEnd("", 1, '-'));
assertEquals("--", Strings.padEnd("", 2, '-'));
assertEquals("x-", Strings.padEnd("x", 2, '-'));
assertEquals("x--", Strings.padEnd("x", 3, '-'));
assertEquals("xx-", Strings.padEnd("xx", 3, '-'));
}
public void testPadEnd_negativeMinLength() {
assertSame("x", Strings.padEnd("x", -1, '-'));
}
// TODO: could remove if we got NPT working in GWT somehow
public void testPadEnd_null() {
try {
Strings.padEnd(null, 5, '0');
fail();
} catch (NullPointerException expected) {
}
}
public void testRepeat() {
String input = "20";
assertEquals("", Strings.repeat(input, 0));
assertEquals("20", Strings.repeat(input, 1));
assertEquals("202020", Strings.repeat(input, 3));
assertEquals("", Strings.repeat("", 4));
try {
Strings.repeat("x", -1);
fail();
} catch (IllegalArgumentException expected) {
}
}
// TODO: could remove if we got NPT working in GWT somehow
public void testRepeat_null() {
try {
Strings.repeat(null, 5);
fail();
} catch (NullPointerException expected) {
}
}
// TODO: salvage the nullpointer testing in a gwt-safe way
// public void testNullPointers() throws Exception {
// NullPointerTester tester = new NullPointerTester();
// tester.testAllPublicStaticMethods(Strings.class);
// }
}
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