replace jest with ava

node_modules/ava/lib/worker/ensure-forked.js

@@ -0,0 +1,18 @@
+'use strict';
+const path = require('path');
+const chalk = require('chalk'); // Use default Chalk instance.
+
+// Check if the test is being run without AVA cli
+const isForked = typeof process.send === 'function';
+if (!isForked) {
+	if (process.argv[1]) {
+		const fp = path.relative('.', process.argv[1]);
+
+		console.log();
+		console.error(`Test files must be run with the AVA CLI:\n\n    ${chalk.grey.dim('$')} ${chalk.cyan('ava ' + fp)}\n`);
+
+		process.exit(1); // eslint-disable-line unicorn/no-process-exit
+	} else {
+		throw new Error('The ’ava’ module can only be imported in test files');
+	}
+}