Reland of Injectable Obj-C video codecs

webrtc/sdk/objc/Framework/UnitTests/objc_video_decoder_factory_tests.mm

+/*
+ *  Copyright 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#import <Foundation/Foundation.h>
+#import <OCMock/OCMock.h>
+
+#include "webrtc/sdk/objc/Framework/Classes/VideoToolbox/objc_video_decoder_factory.h"
+
+#import "WebRTC/RTCVideoCodec.h"
+#import "WebRTC/RTCVideoCodecFactory.h"
+#include "webrtc/modules/include/module_common_types.h"
+#include "webrtc/modules/video_coding/include/video_codec_interface.h"
+#include "webrtc/modules/video_coding/include/video_error_codes.h"
+#include "webrtc/rtc_base/gunit.h"
+
+id<RTCVideoDecoderFactory> CreateDecoderFactoryReturning(int return_code) {
+  id decoderMock = OCMProtocolMock(@protocol(RTCVideoDecoder));
+  OCMStub([decoderMock startDecodeWithSettings:[OCMArg any] numberOfCores:1])
+      .andReturn(return_code);
+  OCMStub([decoderMock decode:[OCMArg any]
+                    missingFrames:NO
+              fragmentationHeader:[OCMArg any]
+                codecSpecificInfo:[OCMArg any]
+                     renderTimeMs:0])
+      .andReturn(return_code);
+  OCMStub([decoderMock releaseDecoder]).andReturn(return_code);
+
+  id decoderFactoryMock = OCMProtocolMock(@protocol(RTCVideoDecoderFactory));
+  RTCVideoCodecInfo *supported =
+      [[RTCVideoCodecInfo alloc] initWithPayload:0 name:@"H264" parameters:@{}];
+  OCMStub([decoderFactoryMock supportedCodecs]).andReturn(@[ supported ]);
+  OCMStub([decoderFactoryMock createDecoder:[OCMArg any]]).andReturn(decoderMock);
+  return decoderFactoryMock;
+}
+
+id<RTCVideoDecoderFactory> CreateOKDecoderFactory() {
+  return CreateDecoderFactoryReturning(WEBRTC_VIDEO_CODEC_OK);
+}
+
+id<RTCVideoDecoderFactory> CreateErrorDecoderFactory() {
+  return CreateDecoderFactoryReturning(WEBRTC_VIDEO_CODEC_ERROR);
+}
+
+webrtc::VideoDecoder *GetObjCDecoder(id<RTCVideoDecoderFactory> factory) {
+  webrtc::ObjCVideoDecoderFactory decoder_factory(factory);
+  return decoder_factory.CreateVideoDecoder(webrtc::kVideoCodecH264);
+}
+
+#pragma mark -
+
+TEST(ObjCVideoDecoderFactoryTest, InitDecodeReturnsOKOnSuccess) {
+  webrtc::VideoDecoder *decoder = GetObjCDecoder(CreateOKDecoderFactory());
+
+  auto settings = new webrtc::VideoCodec();
+  EXPECT_EQ(decoder->InitDecode(settings, 1), WEBRTC_VIDEO_CODEC_OK);
+}
+
+TEST(ObjCVideoDecoderFactoryTest, InitDecodeReturnsErrorOnFail) {
+  webrtc::VideoDecoder *decoder = GetObjCDecoder(CreateErrorDecoderFactory());
+
+  auto settings = new webrtc::VideoCodec();
+  EXPECT_EQ(decoder->InitDecode(settings, 1), WEBRTC_VIDEO_CODEC_ERROR);
+}
+
+TEST(ObjCVideoDecoderFactoryTest, DecodeReturnsOKOnSuccess) {
+  webrtc::VideoDecoder *decoder = GetObjCDecoder(CreateOKDecoderFactory());
+
+  webrtc::EncodedImage encoded_image;
+  webrtc::RTPFragmentationHeader header;
+  webrtc::CodecSpecificInfo info;
+  info.codecType = webrtc::kVideoCodecH264;
+
+  EXPECT_EQ(decoder->Decode(encoded_image, false, &header, &info, 0), WEBRTC_VIDEO_CODEC_OK);
+}
+
+TEST(ObjCVideoDecoderFactoryTest, DecodeReturnsErrorOnFail) {
+  webrtc::VideoDecoder *decoder = GetObjCDecoder(CreateErrorDecoderFactory());
+
+  webrtc::EncodedImage encoded_image;
+  webrtc::RTPFragmentationHeader header;
+  webrtc::CodecSpecificInfo info;
+  info.codecType = webrtc::kVideoCodecH264;
+
+  EXPECT_EQ(decoder->Decode(encoded_image, false, &header, &info, 0), WEBRTC_VIDEO_CODEC_ERROR);
+}
+
+TEST(ObjCVideoDecoderFactoryTest, ReleaseDecodeReturnsOKOnSuccess) {
+  webrtc::VideoDecoder *decoder = GetObjCDecoder(CreateOKDecoderFactory());
+
+  EXPECT_EQ(decoder->Release(), WEBRTC_VIDEO_CODEC_OK);
+}
+
+TEST(ObjCVideoDecoderFactoryTest, ReleaseDecodeReturnsErrorOnFail) {
+  webrtc::VideoDecoder *decoder = GetObjCDecoder(CreateErrorDecoderFactory());
+
+  EXPECT_EQ(decoder->Release(), WEBRTC_VIDEO_CODEC_ERROR);
+}