feat(tests): add convenience method for camera init

packages/camera/camera_avfoundation/example/ios/RunnerTests/CameraTestUtils.h

@@ -11,6 +11,12 @@ NS_ASSUME_NONNULL_BEGIN
 /// @return an FLTCam object.
 extern FLTCam *FLTCreateCamWithCaptureSessionQueue(dispatch_queue_t captureSessionQueue);
 
+/// Creates an `FLTCam` with a given captureSession and resolutionPreset
+/// @param captureSession AVCaptureSession for video
+/// @param resolutionPreset preset for camera's captureSession resolution
+/// @return an FLTCam object.
+extern FLTCam *FLTCreateCamWithVideoCaptureSession(AVCaptureSession *captureSession, NSString *resolutionPreset);
+
 /// Creates a test sample buffer.
 /// @return a test sample buffer.
 extern CMSampleBufferRef FLTCreateTestSampleBuffer(void);

packages/camera/camera_avfoundation/example/ios/RunnerTests/CameraTestUtils.m

@@ -29,6 +29,25 @@
                                       error:nil];
 }
 
+FLTCam *FLTCreateCamWithVideoCaptureSession(AVCaptureSession *captureSession, NSString *resolutionPreset) {
+  id inputMock = OCMClassMock([AVCaptureDeviceInput class]);
+  OCMStub([inputMock deviceInputWithDevice:[OCMArg any] error:[OCMArg setTo:nil]])
+      .andReturn(inputMock);
+
+  id audioSessionMock = OCMClassMock([AVCaptureSession class]);
+  OCMStub([audioSessionMock addInputWithNoConnections:[OCMArg any]]);  // no-op
+  OCMStub([audioSessionMock canSetSessionPreset:[OCMArg any]]).andReturn(YES);
+
+  return [[FLTCam alloc] initWithCameraName:@"camera"
+                           resolutionPreset:resolutionPreset
+                                enableAudio:true
+                                orientation:UIDeviceOrientationPortrait
+                        videoCaptureSession:captureSession
+                        audioCaptureSession:audioSessionMock
+                        captureSessionQueue:dispatch_queue_create("capture_session_queue", NULL)
+                                      error:nil];
+}
+
 CMSampleBufferRef FLTCreateTestSampleBuffer(void) {
   CVPixelBufferRef pixelBuffer;
   CVPixelBufferCreate(kCFAllocatorDefault, 100, 100, kCVPixelFormatType_32BGRA, NULL, &pixelBuffer);