Add test for diagnostics

Author: Victorystick

test/sample/syntax-error/missing-type.ts

@@ -0,0 +1 @@
+var a: ;

test/test.js

@@ -8,47 +8,44 @@ describe( 'rollup-plugin-typescript', function () {
 	this.timeout( 5000 );
 
 	it( 'runs code through typescript', function () {
-		var start = Date.now();
-
 		return rollup.rollup({
 			entry: 'sample/basic/main.ts',
 			plugins: [
 				typescript()
 			]
 		}).then( function ( bundle ) {
-			console.log( 'bundled in %s ms', Date.now() - start );
-
-			start = Date.now();
 			const generated = bundle.generate();
-			console.log( 'generated in %s ms', Date.now() - start );
-
 			const code = generated.code;
 
 			assert.ok( code.indexOf( 'number' ) === -1, code );
 			assert.ok( code.indexOf( 'const' ) === -1, code );
 		});
 	});
 
-	it( 'transpiles ES6 features to ES5', function () {
-		var start = Date.now();
-
+	it( 'transpiles ES6 features to ES5 with source maps', function () {
 		return rollup.rollup({
 			entry: 'sample/import-class/main.ts',
 			plugins: [
 				typescript()
 			]
 		}).then( function ( bundle ) {
-			console.log( 'bundled in %s ms', Date.now() - start );
-
-			start = Date.now();
 			const generated = bundle.generate();
-			console.log( 'generated in %s ms', Date.now() - start );
-
 			const code = generated.code;
 
 			assert.ok( code.indexOf( 'class' ) === -1, code );
 			assert.ok( code.indexOf( '...' ) === -1, code );
 			assert.ok( code.indexOf( '=>' ) === -1, code );
 		});
 	});
+
+	it( 'reports diagnostics and throws if errors occur during transpilation', function () {
+		return rollup.rollup({
+			entry: 'sample/syntax-error/missing-type.ts',
+			plugins: [
+				typescript()
+			]
+		}).catch( function ( error ) {
+			assert.ok( error.message.indexOf( 'There were TypeScript errors' ) === 0, 'Should reject erroneous code.' );
+		});
+	});
 });