integration_test_helper.dart

import 'package:flutter_driver/driver_extension.dart';
import 'package:flutter_test/flutter_test.dart' as test_base;
import 'package:test/test.dart';

List<dynamic> exceptions = [];
var status = "waiting";

///custom expect method to intercept fails
expect(dynamic actual, dynamic matcher, {String reason, dynamic skip}) {
  try {
    test_base.expect(actual, WrappedMatcher(matcher),
        reason: reason, skip: skip);
  } catch (err) {
    exceptions.add(err);
    rethrow;
  }
}

void setUp(Function setup) => test_base.setUp(setup);
void setUpAll(Function setup) => test_base.setUpAll(setup);
void tearDown(Function tearDown) => test_base.tearDown(tearDown);
void tearDownAll(Function tearDown) => test_base.tearDownAll(tearDown);


initIntegrationTests() {
  enableFlutterDriverExtension(handler: (request) => Future.value(status));
  test_base.tearDownAll(() {
    if (exceptions.isEmpty) {
      status = "ok";
    } else {
      status = "fail: " + exceptions.join("\n");
    }
  });
}

class WrappedMatcher extends test_base.Matcher {
  test_base.Matcher matcher;

  WrappedMatcher(dynamic m) {
    if (m is test_base.Matcher) {
      this.matcher = m;
    } else {
      this.matcher = test_base.equals(m);
    }
  }

  @override
  test_base.Description describe(test_base.Description description) {
    return matcher.describe(description);
  }

  @override
  bool matches(item, Map matchState) {
    final result = matcher.matches(item, matchState);
    if (!result) {
      exceptions.add(Exception("expected $item, was ${matchState.toString()}"));
    }
    return result;
  }
}

void test(
  Object description,
  Function body, {
  String testOn,
  Timeout timeout,
  dynamic skip,
  dynamic tags,
  Map<String, dynamic> onPlatform,
  int retry,
}) {
  if (skip == true) return;
  try {
    test_base.test(description, () async {
      try {
        await body();
      } catch (err) {
        exceptions.add(err);
        rethrow;
      }
    },
        testOn: testOn,
        timeout: timeout,
        skip: skip,
        tags: tags,
        onPlatform: onPlatform,
        retry: retry);
  } catch (err) {
    exceptions.add(err);
    rethrow;
  }
}