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/*
* Copyright (C) 2010 The Guava Authors
*
* 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 com.google.common.annotations.GwtCompatible;
import junit.framework.TestCase;
/**
* Unit test for {@link Ascii}.
*
* @author Craig Berry
*/
@GwtCompatible
public class AsciiTest extends TestCase {
/**
* The Unicode points {@code 00c1} and {@code 00e1} are the upper- and
* lowercase forms of A-with-acute-accent, {@code Á} and {@code á}.
*/
private static final String IGNORED =
"`10-=~!@#$%^&*()_+[]\\{}|;':\",./<>?'\u00c1\u00e1\n";
private static final String LOWER = "abcdefghijklmnopqrstuvwxyz";
private static final String UPPER = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
public void testToLowerCase() {
assertEquals(LOWER, Ascii.toLowerCase(UPPER));
assertSame(LOWER, Ascii.toLowerCase(LOWER));
assertEquals(IGNORED, Ascii.toLowerCase(IGNORED));
assertEquals("foobar", Ascii.toLowerCase("fOobaR"));
}
public void testToUpperCase() {
assertEquals(UPPER, Ascii.toUpperCase(LOWER));
assertSame(UPPER, Ascii.toUpperCase(UPPER));
assertEquals(IGNORED, Ascii.toUpperCase(IGNORED));
assertEquals("FOOBAR", Ascii.toUpperCase("FoOBAr"));
}
public void testCharsIgnored() {
for (char c : IGNORED.toCharArray()) {
String str = String.valueOf(c);
assertTrue(str, c == Ascii.toLowerCase(c));
assertTrue(str, c == Ascii.toUpperCase(c));
assertFalse(str, Ascii.isLowerCase(c));
assertFalse(str, Ascii.isUpperCase(c));
}
}
public void testCharsLower() {
for (char c : LOWER.toCharArray()) {
String str = String.valueOf(c);
assertTrue(str, c == Ascii.toLowerCase(c));
assertFalse(str, c == Ascii.toUpperCase(c));
assertTrue(str, Ascii.isLowerCase(c));
assertFalse(str, Ascii.isUpperCase(c));
}
}
public void testCharsUpper() {
for (char c : UPPER.toCharArray()) {
String str = String.valueOf(c);
assertFalse(str, c == Ascii.toLowerCase(c));
assertTrue(str, c == Ascii.toUpperCase(c));
assertFalse(str, Ascii.isLowerCase(c));
assertTrue(str, Ascii.isUpperCase(c));
}
}
public void testTruncate() {
assertEquals("foobar", Ascii.truncate("foobar", 10, "..."));
assertEquals("fo...", Ascii.truncate("foobar", 5, "..."));
assertEquals("foobar", Ascii.truncate("foobar", 6, "..."));
assertEquals("...", Ascii.truncate("foobar", 3, "..."));
assertEquals("foobar", Ascii.truncate("foobar", 10, "…"));
assertEquals("foo…", Ascii.truncate("foobar", 4, "…"));
assertEquals("fo--", Ascii.truncate("foobar", 4, "--"));
assertEquals("foobar", Ascii.truncate("foobar", 6, "…"));
assertEquals("foob…", Ascii.truncate("foobar", 5, "…"));
assertEquals("foo", Ascii.truncate("foobar", 3, ""));
assertEquals("", Ascii.truncate("", 5, ""));
assertEquals("", Ascii.truncate("", 5, "..."));
assertEquals("", Ascii.truncate("", 0, ""));
}
public void testTruncateIllegalArguments() {
String truncated = null;
try {
truncated = Ascii.truncate("foobar", 2, "...");
fail();
} catch (IllegalArgumentException expected) {}
try {
truncated = Ascii.truncate("foobar", 8, "1234567890");
fail();
} catch (IllegalArgumentException expected) {}
try {
truncated = Ascii.truncate("foobar", -1, "...");
fail();
} catch (IllegalArgumentException expected) {}
try {
truncated = Ascii.truncate("foobar", -1, "");
fail();
} catch (IllegalArgumentException expected) {}
}
public void testEqualsIgnoreCase() {
assertTrue(Ascii.equalsIgnoreCase("", ""));
assertFalse(Ascii.equalsIgnoreCase("", "x"));
assertFalse(Ascii.equalsIgnoreCase("x", ""));
assertTrue(Ascii.equalsIgnoreCase(LOWER, UPPER));
assertTrue(Ascii.equalsIgnoreCase(UPPER, LOWER));
// Create new strings here to avoid early-out logic.
assertTrue(Ascii.equalsIgnoreCase(new String(IGNORED), new String(IGNORED)));
// Compare to: "\u00c1".equalsIgnoreCase("\u00e1") == true
assertFalse(Ascii.equalsIgnoreCase("\u00c1", "\u00e1"));
// Test chars just outside the alphabetic range ('A'-1 vs 'a'-1, 'Z'+1 vs 'z'+1)
assertFalse(Ascii.equalsIgnoreCase("@", "`"));
assertFalse(Ascii.equalsIgnoreCase("[", "{"));
}
public void testEqualsIgnoreCaseUnicodeEquivalence() {
// Note that it's possible in future that the JDK's idea to toUpperCase() or equalsIgnoreCase()
// may change and break assumptions in this test [*]. This is not a bug in the implementation of
// Ascii.equalsIgnoreCase(), but it is a signal that its documentation may need updating as
// regards edge cases.
// The Unicode point {@code 00df} is the lowercase form of sharp-S (ß), whose uppercase is "SS".
assertEquals("pa\u00dfword".toUpperCase(), "PASSWORD"); // [*]
assertFalse("pa\u00dfword".equalsIgnoreCase("PASSWORD")); // [*]
assertFalse(Ascii.equalsIgnoreCase("pa\u00dfword", "PASSWORD"));
}
}
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