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// Copyright (C) 2017 The Android Open Source Project
//
// 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.gerrit.server.fixes;
import static com.google.common.truth.Truth.assertThat;
import static com.google.gerrit.testing.GerritJUnit.assertThrows;
import org.junit.Before;
import org.junit.Test;
public class StringModifierTest {
private final String originalString = "This is the original, unmodified string.";
private StringModifier stringModifier;
@Before
public void setUp() {
stringModifier = new StringModifier(originalString);
}
@Test
public void singlePartIsReplaced() {
stringModifier.replace(0, 11, "An");
String modifiedString = stringModifier.getResult();
assertThat(modifiedString).isEqualTo("An original, unmodified string.");
}
@Test
public void twoPartsCanBeReplacedWithInsertionFirst() {
stringModifier.replace(5, 5, "string ");
stringModifier.replace(8, 39, "a modified version");
String modifiedString = stringModifier.getResult();
assertThat(modifiedString).isEqualTo("This string is a modified version.");
}
@Test
public void twoPartsCanBeReplacedWithDeletionFirst() {
stringModifier.replace(0, 8, "");
stringModifier.replace(12, 32, "modified");
String modifiedString = stringModifier.getResult();
assertThat(modifiedString).isEqualTo("the modified string.");
}
@Test
public void replacedPartsMayTouch() {
stringModifier.replace(0, 8, "");
stringModifier.replace(8, 32, "The modified");
String modifiedString = stringModifier.getResult();
assertThat(modifiedString).isEqualTo("The modified string.");
}
@Test
public void replacedPartsMustNotOverlap() {
stringModifier.replace(0, 9, "");
assertThrows(
StringIndexOutOfBoundsException.class, () -> stringModifier.replace(8, 32, "The modified"));
}
@Test
public void startIndexMustNotBeGreaterThanEndIndex() {
assertThrows(
StringIndexOutOfBoundsException.class, () -> stringModifier.replace(10, 9, "something"));
}
@Test
public void startIndexMustNotBeNegative() {
assertThrows(
StringIndexOutOfBoundsException.class, () -> stringModifier.replace(-1, 9, "something"));
}
@Test
public void newContentCanBeInsertedAtEndOfString() {
stringModifier.replace(
originalString.length(), originalString.length(), " And this an addition.");
String modifiedString = stringModifier.getResult();
assertThat(modifiedString)
.isEqualTo("This is the original, unmodified string. And this an addition.");
}
@Test
public void startIndexMustNotBeGreaterThanLengthOfString() {
assertThrows(
StringIndexOutOfBoundsException.class,
() ->
stringModifier.replace(
originalString.length() + 1, originalString.length() + 1, "something"));
}
@Test
public void endIndexMustNotBeGreaterThanLengthOfString() {
assertThrows(
StringIndexOutOfBoundsException.class,
() -> stringModifier.replace(8, originalString.length() + 1, "something"));
}
}