fix error for Example test cases

test/Examples.test.js

@@ -41,11 +41,17 @@ describe("Examples", () => {
 				}
 				webpack(options, (err, stats) => {
 					if (err) return done(err);
-					stats = stats.toJson({
-						errorDetails: true
-					});
-					if (stats.errors.length > 0) {
-						return done(new Error(stats.errors[0]));
+					if (stats.hasErrors()) {
+						return done(
+							new Error(
+								stats.toString({
+									all: false,
+									errors: true,
+									errorDetails: true,
+									errorStacks: true
+								})
+							)
+						);
 					}
 					done();
 				});