[camera_android] Remove TestUtils.java (#6490)

Removes `TestUtils.java`, in favor of using `@VisibileForTesting` instead. I had to change a couple of types from the interface type to the actual implementation type too, to accomplish the removal.

fixes flutter/flutter#146457

packages/camera/camera_android/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.10.9+1
+
+* Changes the visibility of a number of fields to `@VisibleForTesting` in order simplify testing.
+
 ## 0.10.9
 
 * Adds support to control video FPS and bitrate. See `CameraController.withSettings`.

packages/camera/camera_android/android/src/main/java/io/flutter/plugins/camera/Camera.java

@@ -105,15 +105,15 @@ class Camera
    * Takes an input/output surface and orients the recording correctly. This is needed because
    * switching cameras while recording causes the wrong orientation.
    */
-  private VideoRenderer videoRenderer;
+  @VisibleForTesting VideoRenderer videoRenderer;
 
   /**
    * Whether or not the camera aligns with the initial way the camera was facing if the camera was
    * flipped.
    */
-  private int initialCameraFacing;
+  @VisibleForTesting int initialCameraFacing;
 
-  private final SurfaceTextureEntry flutterTexture;
+  @VisibleForTesting final SurfaceTextureEntry flutterTexture;
   private final VideoCaptureSettings videoCaptureSettings;
   private final Context applicationContext;
   final DartMessenger dartMessenger;
@@ -130,16 +130,16 @@ class Camera
 
   CameraDeviceWrapper cameraDevice;
   CameraCaptureSession captureSession;
-  private ImageReader pictureImageReader;
+  @VisibleForTesting ImageReader pictureImageReader;
   ImageStreamReader imageStreamReader;
   /** {@link CaptureRequest.Builder} for the camera preview */
   CaptureRequest.Builder previewRequestBuilder;
 
-  private MediaRecorder mediaRecorder;
+  @VisibleForTesting MediaRecorder mediaRecorder;
   /** True when recording video. */
   boolean recordingVideo;
   /** True when the preview is paused. */
-  private boolean pausedPreview;
+  @VisibleForTesting boolean pausedPreview;
 
   private File captureFile;
 

packages/camera/camera_android/android/src/main/java/io/flutter/plugins/camera/MethodCallHandlerImpl.java

@@ -10,6 +10,7 @@
 import android.os.Looper;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
 import io.flutter.embedding.engine.systemchannels.PlatformChannel;
 import io.flutter.plugin.common.BinaryMessenger;
 import io.flutter.plugin.common.EventChannel;
@@ -36,7 +37,7 @@ final class MethodCallHandlerImpl implements MethodChannel.MethodCallHandler {
   private final TextureRegistry textureRegistry;
   private final MethodChannel methodChannel;
   private final EventChannel imageStreamChannel;
-  private @Nullable Camera camera;
+  @VisibleForTesting @Nullable Camera camera;
 
   MethodCallHandlerImpl(
       Activity activity,

packages/camera/camera_android/android/src/test/java/io/flutter/plugins/camera/MethodCallHandlerImplTest.java

@@ -16,14 +16,13 @@
 import io.flutter.plugin.common.BinaryMessenger;
 import io.flutter.plugin.common.MethodCall;
 import io.flutter.plugin.common.MethodChannel;
-import io.flutter.plugins.camera.utils.TestUtils;
 import io.flutter.view.TextureRegistry;
 import org.junit.Before;
 import org.junit.Test;
 
 public class MethodCallHandlerImplTest {
 
-  MethodChannel.MethodCallHandler handler;
+  MethodCallHandlerImpl handler;
   MethodChannel.Result mockResult;
   Camera mockCamera;
 
@@ -38,7 +37,7 @@ public void setUp() {
             mock(TextureRegistry.class));
     mockResult = mock(MethodChannel.Result.class);
     mockCamera = mock(Camera.class);
-    TestUtils.setPrivateField(handler, "camera", mockCamera);
+    handler.camera = mockCamera;
   }
 
   @Test

packages/camera/camera_android/pubspec.yaml

@@ -3,7 +3,7 @@ description: Android implementation of the camera plugin.
 repository: https://github.com/flutter/packages/tree/main/packages/camera/camera_android
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+camera%22
 
-version: 0.10.9
+version: 0.10.9+1
 
 environment:
   sdk: ^3.1.0