add unit test

test/generator/samples/select-one-way-bind/_config.js

@@ -0,0 +1,19 @@
+export default {
+	'skip-ssr': true,
+
+	data: {
+		foo: 'a'
+	},
+
+	test ( assert, component, target ) {
+		const options = target.querySelectorAll( 'option' );
+
+		assert.equal( options[0].selected, true );
+		assert.equal( options[1].selected, false );
+
+		component.set( { foo: 'b' } );
+
+		assert.equal( options[0].selected, false );
+		assert.equal( options[1].selected, true );
+	}
+};

test/generator/samples/select-one-way-bind/main.html

@@ -0,0 +1,4 @@
+<select value="{{foo}}">
+	<option>a</option>
+	<option>b</option>
+</select>