Add test for #9 (and deal with #16) (#31)

test/fixture/index.js

@@ -19,6 +19,11 @@ ipc.answerRenderer('test-error', async () => {
 	throw new Error('test-error:main:answer');
 });
 
+ipc.answerRenderer('test-concurrency', async data => {
+	console.log('test-concurrency:main:data-from-renderer:', data);
+	return `test-concurrency:main:answer:${data}`;
+});
+
 let mainWindow;
 
 (async () => {

test/fixture/renderer.js

@@ -17,7 +17,15 @@ ipc.callMain('test-error').catch(error => {
 
 ipc.callMain('test-focused', 'optional-data').then(answer => {
 	console.log('test-focused:renderer:answer-from-main:', answer);
-})
+});
+
+ipc.callMain('test-concurrency', 'data-1').then(answer => {
+	console.log('test-concurrency:renderer:answer-from-main-1:', answer);
+});
+
+ipc.callMain('test-concurrency', 'data-2').then(answer => {
+	console.log('test-concurrency:renderer:answer-from-main-2:', answer);
+});
 
 ipc.answerMain('test-focused', data => {
 	console.log('test-focused:renderer:data-from-main:', data);

test/fixture/test.js

@@ -45,12 +45,16 @@ test('main', async t => {
 	t.deepEqual(logs, [
 		// TODO: The value is missing as Spectron only captures the first argument to `console.log`:
 		// https://github.com/electron/spectron/issues/282
+		'"test-concurrency:renderer:answer-from-main-1:" "test-concurrency:main:answer:data-1"',
+		'"test-concurrency:renderer:answer-from-main-2:" "test-concurrency:main:answer:data-2"',
 		'"test-error:renderer:from-main:error-message" "test-error:main:answer"',
 		'"test-error:renderer:from-main:is-error" true',
 		'"test-focused:renderer:answer-from-main:" "test-focused:main:answer"',
 		'"test-focused:renderer:data-from-main:" "optional-data"',
 		'"test:renderer:answer-from-main:" "test:main:answer"',
 		'"test:renderer:data-from-main:" "optional-data"',
+		'test-concurrency:main:data-from-renderer: data-1',
+		'test-concurrency:main:data-from-renderer: data-2',
 		'test-focused:main:answer-from-renderer: test-focused:renderer:answer-data',
 		'test-focused:main:data-from-renderer: optional-data',
 		'test-focused:main:error-from-renderer: No browser window in focus',