Add unit tests for SavedSate component

editor/header/saved-state/index.js

@@ -24,7 +24,7 @@ import {
 	getEditedPostAttribute,
 } from '../../selectors';
 
-function SavedState( { isNew, isDirty, isSaving, isSaveable, status, onStatusChange, onSave } ) {
+export function SavedState( { isNew, isDirty, isSaving, isSaveable, status, onStatusChange, onSave } ) {
 	const className = 'editor-saved-state';
 
 	if ( isSaving ) {

editor/header/saved-state/test/index.js

@@ -0,0 +1,70 @@
+/**
+ * External dependencies
+ */
+import { expect } from 'chai';
+import { shallow } from 'enzyme';
+import sinon from 'sinon';
+
+/**
+ * Internal dependencies
+ */
+import { SavedState } from '../';
+
+describe( 'SavedState', () => {
+	it( 'should display saving while save in progress, even if not saveable', () => {
+		const wrapper = shallow(
+			<SavedState
+				isNew
+				isDirty={ false }
+				isSaving={ true }
+				isSaveable={ false } />
+		);
+
+		expect( wrapper.text() ).to.equal( 'Saving' );
+	} );
+
+	it( 'returns null if the post is not saveable', () => {
+		const wrapper = shallow(
+			<SavedState
+				isNew
+				isDirty={ false }
+				isSaving={ false }
+				isSaveable={ false } />
+		);
+
+		expect( wrapper.type() ).to.be.null();
+	} );
+
+	it( 'should return Saved text if not new and not dirty', () => {
+		const wrapper = shallow(
+			<SavedState
+				isNew={ false }
+				isDirty={ false }
+				isSaving={ false }
+				isSaveable={ true } />
+		);
+
+		expect( wrapper.childAt( 0 ).name() ).to.equal( 'Dashicon' );
+		expect( wrapper.childAt( 1 ).text() ).to.equal( 'Saved' );
+	} );
+
+	it( 'should return Save button if edits to be saved', () => {
+		const statusSpy = sinon.spy();
+		const saveSpy = sinon.spy();
+		const wrapper = shallow(
+			<SavedState
+				isNew={ false }
+				isDirty={ true }
+				isSaving={ false }
+				isSaveable={ true }
+				onStatusChange={ statusSpy }
+				onSave={ saveSpy } />
+		);
+
+		expect( wrapper.name() ).to.equal( 'Button' );
+		expect( wrapper.childAt( 0 ).text() ).to.equal( 'Save' );
+		wrapper.simulate( 'click' );
+		expect( statusSpy ).to.have.been.calledWith( 'draft' );
+		expect( saveSpy ).to.have.been.called();
+	} );
+} );