if AVA is not required in a test, throw an error instead of process.exit

Author: jamestalmage

lib/babel.js

@@ -48,10 +48,7 @@ requireFromString(transpiled.code, testPath, {
 });
 
 if (!avaRequired) {
-	console.error('No tests found in ' + testPath + ', make sure to import "ava" at the top of your test file');
-	setImmediate(function () {
-		process.exit(1);
-	});
+	throw new Error('No tests found in ' + testPath + ', make sure to import "ava" at the top of your test file');
 }
 
 process.on('message', function (message) {

test/test.js

@@ -1109,9 +1109,9 @@ test('titles of both passing and failing tests and AssertionErrors are displayed
 test('empty test files creates a failure with a helpful warning', function (t) {
 	t.plan(2);
 
-	execCli('fixture/empty.js', function (err, stdout) {
+	execCli('fixture/empty.js', function (err, stdout, stderr) {
 		t.ok(err);
-		t.ok(/No tests found.*?import "ava"/.test(stdout));
+		t.ok(/No tests found.*?import "ava"/.test(stderr));
 		t.end();
 	});
 });