Add more missing tests

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

@@ -351,12 +351,8 @@ public void onMethodCall(@NonNull MethodCall call, @NonNull final Result result)
         }
       case "resumePreview":
         {
-          try {
-            camera.resumePreview();
-            result.success(null);
-          } catch (Exception e) {
-            handleException(e, result);
-          }
+          camera.resumePreview();
+          result.success(null);
           break;
         }
       case "dispose":

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

@@ -0,0 +1,69 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package io.flutter.plugins.camera;
+
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+import android.app.Activity;
+import android.hardware.camera2.CameraAccessException;
+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;
+  MethodChannel.Result mockResult;
+  Camera mockCamera;
+
+  @Before
+  public void setUp() {
+    handler =
+        new MethodCallHandlerImpl(
+            mock(Activity.class),
+            mock(BinaryMessenger.class),
+            mock(CameraPermissions.class),
+            mock(CameraPermissions.PermissionsRegistry.class),
+            mock(TextureRegistry.class),
+            null);
+    mockResult = mock(MethodChannel.Result.class);
+    mockCamera = mock(Camera.class);
+    TestUtils.setPrivateField(handler, "camera", mockCamera);
+  }
+
+  @Test
+  public void onMethodCall_pausePreview_shouldPausePreviewAndSendSuccessResult()
+      throws CameraAccessException {
+    handler.onMethodCall(new MethodCall("pausePreview", null), mockResult);
+
+    verify(mockCamera, times(1)).pausePreview();
+    verify(mockResult, times(1)).success(null);
+  }
+
+  @Test
+  public void onMethodCall_pausePreview_shouldSendErrorResultOnCameraAccessException()
+      throws CameraAccessException {
+    doThrow(new CameraAccessException(0)).when(mockCamera).pausePreview();
+
+    handler.onMethodCall(new MethodCall("pausePreview", null), mockResult);
+
+    verify(mockResult, times(1)).error("CameraAccess", null, null);
+  }
+
+  @Test
+  public void onMethodCall_resumePreview_shouldResumePreviewAndSendSuccessResult() {
+    handler.onMethodCall(new MethodCall("resumePreview", null), mockResult);
+
+    verify(mockCamera, times(1)).resumePreview();
+    verify(mockResult, times(1)).success(null);
+  }
+}