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// Copyright 2014 The Bazel Authors. All rights reserved.
//
// 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.devtools.build.lib.util;
import static com.google.common.truth.Truth.assertThat;
import static com.google.devtools.build.lib.util.StringUtilities.combineKeys;
import static com.google.devtools.build.lib.util.StringUtilities.joinLines;
import static com.google.devtools.build.lib.util.StringUtilities.layoutTable;
import static com.google.devtools.build.lib.util.StringUtilities.prettyPrintBytes;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import com.google.common.collect.Maps;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
/**
* A test for {@link StringUtilities}.
*/
@RunWith(JUnit4.class)
public class StringUtilitiesTest {
// Tests of StringUtilities.joinLines()
@Test
public void emptyLinesYieldsEmptyString() {
assertThat(joinLines()).isEmpty();
}
@Test
public void twoLinesGetjoinedNicely() {
assertEquals("line 1\nline 2", joinLines("line 1", "line 2"));
}
@Test
public void aTrailingNewlineIsAvailableWhenYouNeedIt() {
assertEquals("two lines\nwith trailing newline\n",
joinLines("two lines", "with trailing newline", ""));
}
// Tests of StringUtilities.combineKeys()
/** Simple sanity test of format */
@Test
public void combineKeysFormat() {
assertEquals("<a><b!!c><!<d!>>", combineKeys("a", "b!c", "<d>"));
}
/**
* Test that combining different keys gives different results,
* i.e. that there are no collisions.
* We test all combinations of up to 3 keys from the test_keys
* array (defined below).
*/
@Test
public void testCombineKeys() {
// This map is really just used as a set, but
// if the test fails, the values in the map may be
// useful for debugging.
Map<String,String[]> map = new HashMap<>();
for (int numKeys = 0; numKeys <= 3; numKeys++) {
testCombineKeys(map, numKeys, new String[numKeys]);
}
}
private void testCombineKeys(Map<String,String[]> map,
int n, String[] keys) {
if (n == 0) {
String[] keys_copy = keys.clone();
String combined_key = combineKeys(keys_copy);
String[] prev_keys = map.put(combined_key, keys_copy);
if (prev_keys != null) {
fail("combineKeys collision:\n"
+ "key sequence 1: " + Arrays.toString(prev_keys) + "\n"
+ "key sequence 2: " + Arrays.toString(keys_copy) + "\n"
+ "combined key sequence 1: " + combineKeys(prev_keys) + "\n"
+ "combined key sequence 2: " + combineKeys(keys_copy) + "\n");
}
} else {
for (String key : test_keys) {
keys[n - 1] = key;
testCombineKeys(map, n - 1, keys);
}
}
}
private static final String[] test_keys = {
// ordinary strings
"", "a", "word", "//depot/foo/bar",
// likely delimiter characters
" ", ",", "\\", "\"", "\'", "\0", "\u00ff",
// strings starting in special delimiter
" foo", ",foo", "\\foo", "\"foo", "\'foo", "\0foo", "\u00fffoo",
// strings ending in special delimiter
"bar ", "bar,", "bar\\", "bar\"", "bar\'", "bar\0", "bar\u00ff",
// white-box testing of the delimiters that combineKeys() uses
"<", ">", "!", "!<", "!>", "!!", "<!", ">!"
};
@Test
public void replaceAllLiteral() throws Exception {
assertEquals("ababab",
StringUtilities.replaceAllLiteral("bababa", "ba", "ab"));
assertThat(StringUtilities.replaceAllLiteral("bababa", "ba", "")).isEmpty();
assertEquals("bababa",
StringUtilities.replaceAllLiteral("bababa", "", "ab"));
}
@Test
public void testLayoutTable() throws Exception {
Map<String, String> data = Maps.newTreeMap();
data.put("foo", "bar");
data.put("bang", "baz");
data.put("lengthy key", "lengthy value");
assertEquals(joinLines("bang: baz",
"foo: bar",
"lengthy key: lengthy value"), layoutTable(data));
}
@Test
public void testPrettyPrintBytes() {
String[] expected = {
"2B",
"23B",
"234B",
"2345B",
"23KB",
"234KB",
"2345KB",
"23MB",
"234MB",
"2345MB",
"23456MB",
"234GB",
"2345GB",
"23456GB",
};
double x = 2.3456;
for (int ii = 0; ii < expected.length; ++ii) {
assertEquals(expected[ii], prettyPrintBytes((long) x));
x = x * 10.0;
}
}
@Test
public void sanitizeControlChars() {
assertEquals("<?>", StringUtilities.sanitizeControlChars("\000"));
assertEquals("<?>", StringUtilities.sanitizeControlChars("\001"));
assertEquals("\\r", StringUtilities.sanitizeControlChars("\r"));
assertEquals(" abc123", StringUtilities.sanitizeControlChars(" abc123"));
}
@Test
public void containsSubarray() {
assertTrue(StringUtilities.containsSubarray("abcde".toCharArray(), "ab".toCharArray()));
assertTrue(StringUtilities.containsSubarray("abcde".toCharArray(), "de".toCharArray()));
assertTrue(StringUtilities.containsSubarray("abcde".toCharArray(), "bc".toCharArray()));
assertTrue(StringUtilities.containsSubarray("abcde".toCharArray(), "".toCharArray()));
}
@Test
public void notContainsSubarray() {
assertFalse(StringUtilities.containsSubarray("abc".toCharArray(), "abcd".toCharArray()));
assertFalse(StringUtilities.containsSubarray("abc".toCharArray(), "def".toCharArray()));
assertFalse(StringUtilities.containsSubarray("abcde".toCharArray(), "bd".toCharArray()));
}
@Test
public void toPythonStyleFunctionName() {
assertEquals("a", StringUtilities.toPythonStyleFunctionName("a"));
assertEquals("a_b", StringUtilities.toPythonStyleFunctionName("aB"));
assertEquals("a_b_c", StringUtilities.toPythonStyleFunctionName("aBC"));
assertEquals("a_bc_d", StringUtilities.toPythonStyleFunctionName("aBcD"));
}
}
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