@Test
public void testLatestChangedRangeOfAddedTextAtEnd() {
String oldContent = "HelloWorld";
String newContent = "HelloWorldNEW";
ChangedTextFile changedTextFile = new ChangedTextFile("/path", oldContent, newContent);
ChangedRange changedRange = changedTextFile.getLatestChangedRange();
String addedText =
newContent.substring(changedRange.getFirstIndex(), changedRange.getExlusiveEndOfNew());
String removedText =
oldContent.substring(changedRange.getFirstIndex(), changedRange.getExlusiveEndOfOld());
assertEquals("", removedText);
assertEquals("NEW", addedText);
}
@Test
public void testEarliestChangedRangeOfReplacedTextAtStart() {
String oldContent = "OLDHelloWorld";
String newContent = "NEWHelloWorld";
ChangedTextFile changedTextFile = new ChangedTextFile("/path", oldContent, newContent);
ChangedRange changedRange = changedTextFile.getEarliestChangedRange();
String addedText =
newContent.substring(changedRange.getFirstIndex(), changedRange.getExlusiveEndOfNew());
String removedText =
oldContent.substring(changedRange.getFirstIndex(), changedRange.getExlusiveEndOfOld());
assertEquals("OLD", removedText);
assertEquals("NEW", addedText);
}
@Test
public void testLatestChangedRangeAddedTextAtTwoPossibleLocationsInMiddle() {
String oldContent = "HelloWorld";
String newContent = "HelloWoWorld";
ChangedTextFile changedTextFile = new ChangedTextFile("/path", oldContent, newContent);
ChangedRange changedRange = changedTextFile.getLatestChangedRange();
String addedText =
newContent.substring(changedRange.getFirstIndex(), changedRange.getExlusiveEndOfNew());
String removedText =
oldContent.substring(changedRange.getFirstIndex(), changedRange.getExlusiveEndOfOld());
assertEquals("", removedText);
assertEquals("Wo", addedText);
assertEquals(7, changedRange.getFirstIndex());
}