✅ Add tests

plugins/http_compatibility_layer/pubspec.yaml

@@ -21,3 +21,4 @@ dependencies:
 
 dev_dependencies:
   lints: any
+  test: any

plugins/http_compatibility_layer/test/client_mock.dart

@@ -0,0 +1,32 @@
+import 'package:http/http.dart';
+
+class CloseClientMock implements Client {
+  bool closeWasCalled = false;
+
+  @override
+  void close() {
+    closeWasCalled = true;
+  }
+
+  @override
+  void noSuchMethod(Invocation invocation) {
+    throw UnimplementedError();
+  }
+}
+
+class ClientMock implements Client {
+  StreamedResponse? response;
+
+  BaseRequest? request;
+
+  @override
+  Future<StreamedResponse> send(BaseRequest request) async {
+    this.request = request;
+    return response!;
+  }
+
+  @override
+  void noSuchMethod(Invocation invocation) {
+    throw UnimplementedError();
+  }
+}

plugins/http_compatibility_layer/test/conversion_layer_adapter_test.dart

@@ -0,0 +1,63 @@
+import 'dart:typed_data';
+
+import 'package:dio/dio.dart';
+import 'package:dio_http_compatibility_layer/dio_http_compatibility_layer.dart';
+import 'package:http/http.dart';
+import 'package:test/test.dart';
+
+import 'client_mock.dart';
+
+void main() {
+  test('close', () {
+    final mock = CloseClientMock();
+    final cla = ConversionLayerAdapter(mock);
+
+    cla.close();
+
+    expect(mock.closeWasCalled, true);
+  });
+
+  test('close with force', () {
+    final mock = CloseClientMock();
+    final cla = ConversionLayerAdapter(mock);
+
+    cla.close(force: true);
+
+    expect(mock.closeWasCalled, true);
+  });
+
+  test('headers', () async {
+    final mock = ClientMock()..response = StreamedResponse(Stream.empty(), 200);
+    final cla = ConversionLayerAdapter(mock);
+
+    await cla.fetch(
+      RequestOptions(path: '', headers: {'foo': 'bar'}),
+      Stream.empty(),
+      null,
+    );
+
+    expect(mock.request?.headers, {'foo': 'bar'});
+  });
+
+  test('download stream', () async {
+    final mock = ClientMock()
+      ..response = StreamedResponse(
+          Stream.fromIterable(<Uint8List>[
+            Uint8List.fromList([10, 1]),
+            Uint8List.fromList([1, 4]),
+            Uint8List.fromList([5, 1]),
+            Uint8List.fromList([1, 1]),
+            Uint8List.fromList([2, 4]),
+          ]),
+          200);
+    final cla = ConversionLayerAdapter(mock);
+
+    final resp = await cla.fetch(
+      RequestOptions(path: ''),
+      null,
+      null,
+    );
+
+    expect(await resp.stream.length, 5);
+  });
+}