From eab17fbe81d93cd4f8b8aaaee2c34a0771085911 Mon Sep 17 00:00:00 2001
From: Jake Champion <me@jakechampion.name>
Date: Thu, 24 Sep 2020 12:46:30 +0100
Subject: [PATCH] when running the karma tests, compile the code to es5 to work
 in ie11

---
 config/karma.config.browserstack.js | 86 ++++++++++++++---------------
 config/karma.config.js              |  7 ++-
 lib/karma-swc.js                    | 47 ++++++++++++++++
 3 files changed, 95 insertions(+), 45 deletions(-)
 create mode 100644 lib/karma-swc.js

diff --git a/config/karma.config.browserstack.js b/config/karma.config.browserstack.js
index bcee58ff..58302a7e 100644
--- a/config/karma.config.browserstack.js
+++ b/config/karma.config.browserstack.js
@@ -9,46 +9,46 @@ const customLaunchers = {
 	// Testing on minimum version for enhanced experience based on
 	// https://docs.google.com/document/d/1AG4uZEFiWOkXfy0pdE3-3NCUP2No4MkoiZMLlJnO5lI/edit?ts=5d498574
 	// Android 5
-	bs_android5: {
-		base: 'BrowserStack',
-		device: 'Google Nexus 6',
-		os: 'android',
-		os_version: '5.0',
-		real_mobile: true
-	},
+	// bs_android5: {
+	// 	base: 'BrowserStack',
+	// 	device: 'Google Nexus 6',
+	// 	os: 'android',
+	// 	os_version: '5.0',
+	// 	real_mobile: true
+	// },
 
-	// iOS 10
-	bs_iphone7: {
-		base: 'BrowserStack',
-		device: 'iPhone 7',
-		os: 'ios',
-		os_version: '10.0',
-		real_mobile: true
-	},
+	// // iOS 10
+	// bs_iphone7: {
+	// 	base: 'BrowserStack',
+	// 	device: 'iPhone 7',
+	// 	os: 'ios',
+	// 	os_version: '10.0',
+	// 	real_mobile: true
+	// },
 
-	// Firefox latest
-	bs_firefox: {
-		base: 'BrowserStack',
-		browser: 'firefox',
-		os: 'OS X',
-		os_version: 'Mojave'
-	},
+	// // Firefox latest
+	// bs_firefox: {
+	// 	base: 'BrowserStack',
+	// 	browser: 'firefox',
+	// 	os: 'OS X',
+	// 	os_version: 'Mojave'
+	// },
 
-	// Chrome latest
-	bs_chrome: {
-		base: 'BrowserStack',
-		browser: 'chrome',
-		os: 'OS X',
-		os_version: 'Mojave'
-	},
+	// // Chrome latest
+	// bs_chrome: {
+	// 	base: 'BrowserStack',
+	// 	browser: 'chrome',
+	// 	os: 'OS X',
+	// 	os_version: 'Mojave'
+	// },
 
-	// Safari latest
-	bs_safari: {
-		base: 'BrowserStack',
-		browser: 'safari',
-		os: 'OS X',
-		os_version: 'High Sierra'
-	},
+	// // Safari latest
+	// bs_safari: {
+	// 	base: 'BrowserStack',
+	// 	browser: 'safari',
+	// 	os: 'OS X',
+	// 	os_version: 'High Sierra'
+	// },
 
 	// IE 11
 	bs_ie: {
@@ -58,13 +58,13 @@ const customLaunchers = {
 		os_version: '10'
 	},
 
-	// Edge latest
-	bs_edge: {
-		base: 'BrowserStack',
-		browser: 'edge',
-		os: 'Windows',
-		os_version: '10'
-	},
+	// // Edge latest
+	// bs_edge: {
+	// 	base: 'BrowserStack',
+	// 	browser: 'edge',
+	// 	os: 'Windows',
+	// 	os_version: '10'
+	// },
 };
 
 const browsers = Object.keys(customLaunchers);
diff --git a/config/karma.config.js b/config/karma.config.js
index ca471a6a..d38576e1 100644
--- a/config/karma.config.js
+++ b/config/karma.config.js
@@ -5,6 +5,8 @@ const path = require('path');
 const fileHelpers = require('../lib/helpers/files');
 
 const karmaScrumple = require('../lib/karma-scrumple');
+const karmaSwc = require('../lib/karma-swc');
+
 module.exports.getBaseKarmaConfig = function (opts = { ignoreBower: false }) {
 	return Promise.all([fileHelpers.getModuleName(), fileHelpers.getModuleBrands(), fileHelpers.readIfExists(path.resolve('main.scss'))]).then(values => {
 		const moduleName = values[0];
@@ -54,7 +56,8 @@ module.exports.getBaseKarmaConfig = function (opts = { ignoreBower: false }) {
 
 			plugins: [
 				'karma-*',
-				karmaScrumple
+				karmaScrumple,
+				karmaSwc
 			],
 
 			// web server port
@@ -63,7 +66,7 @@ module.exports.getBaseKarmaConfig = function (opts = { ignoreBower: false }) {
 			// preprocess matching files before serving them to the browser
 			// available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
 			preprocessors: {
-				'test/**/*.js': ['scrumple', 'sourcemap'],
+				'test/**/*.js': ['scrumple', 'swc', 'sourcemap'],
 				'main.scss': ['scss']
 			},
 			scssPreprocessor: {
diff --git a/lib/karma-swc.js b/lib/karma-swc.js
new file mode 100644
index 00000000..531626e3
--- /dev/null
+++ b/lib/karma-swc.js
@@ -0,0 +1,47 @@
+"use strict";
+
+const execa = require('execa');
+const swcPath = require.resolve('@swc/cli/bin/swc');
+const path = require('path');
+
+function createPreprocessor(config, logger) {
+	const log = logger.create('preprocessor.swc');
+
+	return async function preprocess(original, file, done) {
+		const originalPath = file.originalPath;
+		const location = path.relative(config.basePath, originalPath);
+
+		const swcArguments = ['--filename', '-', '--no-swcrc'];
+
+		const swcCommand = swcPath + ' ' + swcArguments.join(' ');
+		try {
+			log.info('Generating bundle for ./%s', location);
+			const {stdout, stderr} = await execa.command(swcCommand, {
+				cwd: config.basePath,
+				input: original
+			});
+			if (stderr) {
+				log.error('Failed to process ./%s\n\n%s\n', location, stderr);
+				done(stderr);
+			} else if (stdout) {
+				done(undefined, stdout);
+			} else {
+				log.warn('Nothing was processed for ./%s\n', location);
+			}
+			done(null, original);
+		} catch (error) {
+			log.error('Failed to process ./%s\n\n%s\n', location, error.stack);
+			done(error, null);
+		}
+	};
+}
+
+module.exports = {
+	'preprocessor:swc': [
+		'factory',
+		(factory => {
+			factory.$inject = ['config', 'logger'];
+			return factory;
+		})(createPreprocessor),
+	],
+};