improve diff-tests.ts

diff/diff-tests.ts

@@ -12,3 +12,42 @@ diff.forEach(function (part) {
         part.removed ? '-' : ' ';
     console.log(mark + " " + part.value);
 });
+
+// --------------------------
+
+class LineDiffWithoutWhitespace extends jsdiff.Diff {
+    tokenize(value:string):any {
+        return value.split(/^/m);
+    }
+
+    equals(left:string, right:string):boolean {
+        return left.trim() === right.trim();
+    }
+}
+
+var obj = new LineDiffWithoutWhitespace(true);
+var diff = obj.diff(one, other);
+printDiff(diff);
+
+function printDiff(diff:jsdiff.IDiffResult[]) {
+    function addLineHeader(decorator:string, str:string) {
+        return str.split("\n").map((line, index, array) => {
+            if (index === array.length - 1 && line === "") {
+                return line;
+            } else {
+                return decorator + line;
+            }
+        }).join("\n");
+    }
+
+    diff.forEach((part)=> {
+        if (part.added) {
+            console.log(addLineHeader("+", part.value));
+        } else if (part.removed) {
+            console.log(addLineHeader("-", part.value));
+        } else {
+            console.log(addLineHeader(" ", part.value));
+        }
+    });
+
+}