replace jest with ava

node_modules/ava/lib/environment-variables.js

@@ -0,0 +1,16 @@
+'use strict';
+function validateEnvironmentVariables(environmentVariables) {
+	if (!environmentVariables) {
+		return {};
+	}
+
+	for (const value of Object.values(environmentVariables)) {
+		if (typeof value !== 'string') {
+			throw new TypeError('The ’environmentVariables’ configuration must be an object containing string values.');
+		}
+	}
+
+	return environmentVariables;
+}
+
+module.exports = validateEnvironmentVariables;