Method computeDiff

src/test/java/com/diffplug/gradle/Diff.java:25–46

(String before, String after)

/** Creates diffs which are easy to assert against. */
public class Diff {
	public static String computeDiff(String before, String after) {
		diff_match_patch differ = new diff_match_patch();
		LinkedList<diff_match_patch.Diff> diffs = differ.diff_main(before, after);
		differ.diff_cleanupEfficiency(diffs);
		differ.diff_cleanupSemantic(diffs);
		return StringPrinter.buildString(printer -> {
			for (diff_match_patch.Diff diff : diffs) {
				switch (diff.operation) {
				case EQUAL:
					// do nothing
					break;
				case DELETE:
				case INSERT:
					printer.println(diff.operation.name());
					printer.println(FileMisc.toUnixNewline(diff.text));
					break;
				default:
					throw Unhandled.enumException(diff.operation);
				}
			}
		});
	}
}