fix(world): ensured when the Flutter driver is closed it cannot throw an unhandled exception causing the test run the stop

CHANGELOG.md

@@ -1,3 +1,7 @@
+## [1.1.7+1] - 07/01/2019
+* Ensured when the Flutter driver is closed it cannot throw an unhandled exception causing the test run the stop
+* Updated Gherkin library version
+
 ## [1.1.7] - 06/01/2019
 * `WhenFillFieldStep` Ensure widget is scrolled into view before setting it's value
 * Fixed lint warnings

lib/src/flutter/flutter_world.dart

@@ -18,10 +18,10 @@ class FlutterWorld extends World {
     _flutterRunProcessHandler = flutterRunProcessHandler;
   }
 
-  Future<bool> restartApp(
-      {Duration timeout = const Duration(seconds: 60)}) async {
-    await _driver.waitUntilNoTransientCallbacks();
-    await _driver.close();
+  Future<bool> restartApp({
+    Duration timeout = const Duration(seconds: 60),
+  }) async {
+    await _closeDriver(timeout: timeout);
     final result = await _flutterRunProcessHandler?.restart(
       timeout: timeout,
     );
@@ -37,6 +37,21 @@ class FlutterWorld extends World {
   void dispose() async {
     super.dispose();
     _flutterRunProcessHandler = null;
-    await _driver?.close();
+    await _closeDriver(timeout: const Duration(seconds: 5));
+  }
+
+  Future<void> _closeDriver({
+    Duration timeout = const Duration(seconds: 60),
+  }) async {
+    try {
+      if (_driver != null) {
+        await _driver.waitUntilNoTransientCallbacks(timeout: timeout);
+        await _driver.close();
+      }
+    } catch (e, st) {
+      print('Error closing Flutter driver:\n\n`${e}`\n\n${st}');
+    } finally {
+      _driver = null;
+    }
   }
 }

pubspec.lock

@@ -118,7 +118,7 @@ packages:
       name: gherkin
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.5+1"
+    version: "1.1.5+2"
   glob:
     dependency: "direct main"
     description:
@@ -139,7 +139,7 @@ packages:
       name: http
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.0+3"
+    version: "0.12.0+4"
   http_multi_server:
     dependency: transitive
     description:

pubspec.yaml

@@ -16,7 +16,7 @@ dependencies:
     sdk: flutter
   glob: ^1.1.7
   meta: ">=1.1.6 <2.0.0"
-  gherkin: ^1.1.5+1
+  gherkin: ^1.1.5+2
 
 dev_dependencies:
   test: