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/*
* Copyright (C) 2009 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.escape;
import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.ImmutableMap;
import com.google.common.escape.testing.EscaperAsserts;
import java.io.IOException;
import junit.framework.TestCase;
/** @author David Beaumont */
@GwtCompatible
public class ArrayBasedCharEscaperTest extends TestCase {
private static final ImmutableMap<Character, String> NO_REPLACEMENTS = ImmutableMap.of();
private static final ImmutableMap<Character, String> SIMPLE_REPLACEMENTS =
ImmutableMap.of(
'\n', "<newline>",
'\t', "<tab>",
'&', "<and>");
public void testSafeRange() throws IOException {
// Basic escaping of unsafe chars (wrap them in {,}'s)
CharEscaper wrappingEscaper =
new ArrayBasedCharEscaper(NO_REPLACEMENTS, 'A', 'Z') {
@Override
protected char[] escapeUnsafe(char c) {
return ("{" + c + "}").toCharArray();
}
};
EscaperAsserts.assertBasic(wrappingEscaper);
// '[' and '@' lie either side of [A-Z].
assertEquals("{[}FOO{@}BAR{]}", wrappingEscaper.escape("[FOO@BAR]"));
}
public void testSafeRange_maxLessThanMin() throws IOException {
// Basic escaping of unsafe chars (wrap them in {,}'s)
CharEscaper wrappingEscaper =
new ArrayBasedCharEscaper(NO_REPLACEMENTS, 'Z', 'A') {
@Override
protected char[] escapeUnsafe(char c) {
return ("{" + c + "}").toCharArray();
}
};
EscaperAsserts.assertBasic(wrappingEscaper);
// escape everything.
assertEquals("{[}{F}{O}{O}{]}", wrappingEscaper.escape("[FOO]"));
}
public void testDeleteUnsafeChars() throws IOException {
CharEscaper deletingEscaper =
new ArrayBasedCharEscaper(NO_REPLACEMENTS, ' ', '~') {
private final char[] noChars = new char[0];
@Override
protected char[] escapeUnsafe(char c) {
return noChars;
}
};
EscaperAsserts.assertBasic(deletingEscaper);
assertEquals(
"Everything outside the printable ASCII range is deleted.",
deletingEscaper.escape(
"\tEverything\0 outside the\uD800\uDC00 "
+ "printable ASCII \uFFFFrange is \u007Fdeleted.\n"));
}
public void testReplacementPriority() throws IOException {
CharEscaper replacingEscaper =
new ArrayBasedCharEscaper(SIMPLE_REPLACEMENTS, ' ', '~') {
private final char[] unknown = new char[] {'?'};
@Override
protected char[] escapeUnsafe(char c) {
return unknown;
}
};
EscaperAsserts.assertBasic(replacingEscaper);
// Replacements are applied first regardless of whether the character is in
// the safe range or not ('&' is a safe char while '\t' and '\n' are not).
assertEquals(
"<tab>Fish <and>? Chips?<newline>", replacingEscaper.escape("\tFish &\0 Chips\r\n"));
}
}
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