Shape detection unittests mac (QR and Face) in GPU bots

services/shape_detection/barcode_detection_impl_mac_unittest.mm

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "services/shape_detection/barcode_detection_impl_mac.h"
+
+#include "base/mac/mac_util.h"
+#include "base/mac/scoped_nsobject.h"
+#include "base/mac/sdk_forward_declarations.h"
+#include "base/run_loop.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace shape_detection {
+
+class BarcodeDetectionImplMacTest : public ::testing::Test {
+ public:
+  BarcodeDetectionImplMacTest() = default;

[Robert Sesek, 2017/02/10 20:24:37]

Do you need to provide a ctor and dtor here?

[mcasas, 2017/02/10 21:05:06]

Ah yeah (and also in the face detection unittest). It was
needed because of the DISALLOW_COPY_AND_ASSIGN
that I wrote out of custom. Removed that and the
default ctor.

+  ~BarcodeDetectionImplMacTest() override = default;
+
+  void DetectCallback(std::vector<mojom::BarcodeDetectionResultPtr> results) {
+    Detection(results.size(), results.empty() ? "" : results[0]->raw_value);
+  }
+  MOCK_METHOD2(Detection, void(size_t, const std::string&));
+
+  BarcodeDetectionImplMac impl_;
+  const base::MessageLoop message_loop_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(BarcodeDetectionImplMacTest);
+};
+
+TEST_F(BarcodeDetectionImplMacTest, CreateAndDestroy) {}
+
+// This test generates a single QR code and scans it back.
+TEST_F(BarcodeDetectionImplMacTest, ScanOneBarcode) {
+  const std::string kInfoString = "https://www.chromium.org";
+  // Generate a QR code image as a CIImage by using |qr_code_generator|.
+  NSData* const qr_code_data =
+      [[NSString stringWithUTF8String:kInfoString.c_str()]
+          dataUsingEncoding:NSISOLatin1StringEncoding];
+  // TODO(mcasas): Consider using other generator types (e.g.
+  // CI{AztecCode,Code128Barcode,PDF417Barcode}Generator) when the minimal OS X
+  // is upgraded to 10.10 (https://crbug.com/624049).
+  CIFilter* qr_code_generator =
+      [CIFilter filterWithName:@"CIQRCodeGenerator"];
+  [qr_code_generator setValue:qr_code_data forKey:@"inputMessage"];
+
+  // [CIImage outputImage] is available in macOS 10.10+.  Could be added to
+  // sdk_forward_declarations.h but seems hardly worth it.
+  EXPECT_TRUE([qr_code_generator respondsToSelector:@selector(outputImage)]);

[Robert Sesek, 2017/02/10 20:24:37]

Won't this test then fail on 10.9?

[mcasas, 2017/02/10 21:05:06]

Yes although the bots are 10.11.4 and there's code 
in BarcodeDetectionImplMac to prevent its use before 
10.10.  Nevertheless I'll add a check here.

+  CIImage* qr_code_image =
+      [qr_code_generator performSelector:@selector(outputImage)];
+
+  const gfx::Size size([qr_code_image extent].size.width,
+                       [qr_code_image extent].size.height);
+  const int num_bytes = size.GetArea() * 4 /* bytes per pixel */;
+
+  base::scoped_nsobject<CIContext> context([[CIContext alloc] init]);
+
+  CGImageRef cg_image =
+      [context createCGImage:qr_code_image fromRect:[qr_code_image extent]];

[Robert Sesek, 2017/02/10 20:24:37]

This API follows the "create" rule for memory management, so this is currently
leaked.

https://developer.apple.com/library/content/documentation/CoreFoundation/Conc...

[mcasas, 2017/02/10 21:05:06]

Done.

+  EXPECT_EQ(static_cast<size_t>(size.width()), CGImageGetWidth(cg_image));
+  EXPECT_EQ(static_cast<size_t>(size.height()), CGImageGetHeight(cg_image));
+
+  CFDataRef raw_cg_image_data =
+      CGDataProviderCopyData(CGImageGetDataProvider(cg_image));

[Robert Sesek, 2017/02/10 20:24:37]

Same; the "copy" rule indicates a strong reference, so this is leaked.

[mcasas, 2017/02/10 21:05:06]

Done.

+  EXPECT_TRUE(CFDataGetBytePtr(raw_cg_image_data));
+  EXPECT_EQ(num_bytes, CFDataGetLength(raw_cg_image_data));
+
+  // Generate a new ScopedSharedBufferHandle of the aproppriate size, map it and
+  // copy the generated qr code image pixels into it.
+  mojo::ScopedSharedBufferHandle handle =
+      mojo::SharedBufferHandle::Create(num_bytes);
+  ASSERT_TRUE(handle->is_valid());
+
+  mojo::ScopedSharedBufferMapping mapping = handle->Map(num_bytes);
+  ASSERT_TRUE(mapping);
+
+  memcpy(mapping.get(), CFDataGetBytePtr(raw_cg_image_data), num_bytes);
+
+  // Send the image Detect() and expect the response in callback.
+  EXPECT_CALL(*this, Detection(1, kInfoString));
+  impl_.Detect(std::move(handle), size.width(), size.height(),
+               base::Bind(&BarcodeDetectionImplMacTest::DetectCallback,
+                          base::Unretained(this)));
+
+  base::RunLoop().RunUntilIdle();
+}
+
+}  // shape_detection namespace