Adopt another test from Unexpected.

test/unexpected-magicpen.spec.js

@@ -82,3 +82,29 @@ describe('magicpen type', function () {
         });
     });
 });
+
+describe('magicPen style', function () {
+    it('renders a raw entry', function () {
+        expect(expect.createOutput('text').raw('foo'), 'to inspect as', "magicpen('text').raw('foo') // foo");
+    });
+
+    it('renders an empty block', function () {
+        expect(
+            expect.createOutput('text').block(function () {}),
+            'to inspect as',
+            "magicpen('text').block(function () {}) // "
+        );
+    });
+
+    it('renders text with an empty array of styles', function () {
+        expect(expect.createOutput('text').text('foo', []), 'to inspect as', "magicpen('text').text('foo', []) // foo");
+    });
+
+    it('renders text with a single style not defined as a top-level style', function () {
+        expect(expect.createOutput('text').text('foo', ['blabla']), 'to inspect as', "magicpen('text').text('foo', [ 'blabla' ]) // foo");
+    });
+
+    it('renders text with several styles', function () {
+        expect(expect.createOutput('text').text('foo', ['quux', 'baz']), 'to inspect as', "magicpen('text').text('foo', [ 'quux', 'baz' ]) // foo");
+    });
+});