Run engine unit tests on mac host_debug_unopt_arm64

[zanderso]

Related flutter/flutter#142868

[zanderso]

Copying this out before I hit retry: From: https://ci.chromium.org/ui/p/flutter/builders/try/Mac%20Engine%20Drone/689309/overview

[ RUN      ] Play/BlitPassTest.BlitAcrossDifferentPixelFormatsFails/Metal
-[MTLDebugDevice newTextureWithDescriptor:]:1017: failed assertion `Texture Descriptor Validation
Memoryless texture need to have renderable PixelFormat.

[chinmaygarde]

Can we file issues for the failing validations?

[jonahwilliams]

I'm just going to push fixes to this PR.

[jonahwilliams]

@zanderso I think the remaining failure is a builder config problem?

Running command "python3 test.py"
Traceback (most recent call last):
  File "test.py", line 51, in <module>
    raise Exception(
Exception: Could not locate font-subset in host_debug or host_debug_unopt - build before running this script.

[jonahwilliams]

See also: flutter/flutter#143324

[zanderso]

@zanderso I think the remaining failure is a builder config problem?

Yeah, that looks like the font-subset test script is hardcoding some strings that should be arguments instead. I can take a look at that.

[zanderso]

I've cleaned up an fixed the font-subset test script. The last remaining failure is EmbedderTest.CompositorMustBeAbleToRenderKnownSceneWithSoftwareCompositor, which I'm not sure how to address. It looks like an ad-hoc pixel test.

I filed flutter/flutter#143940

[jonahwilliams]

LGTM, thanks @zanderso !

[jonahwilliams]

Actually you blew away my patch to fix the test by force pushing.

[zanderso]

Actually you blew away my patch to fix the test by force pushing.

Ooooops

[jonahwilliams]

The fix is to change the failing test to the following:

TEST_P(BlitPassTest, BlitAcrossDifferentPixelFormatsFails) {
  ScopedValidationDisable scope;  // avoid noise in output.
  auto context = GetContext();
  auto cmd_buffer = context->CreateCommandBuffer();
  auto blit_pass = cmd_buffer->CreateBlitPass();

  TextureDescriptor src_desc;
  src_desc.format = PixelFormat::kA8UNormInt;
  src_desc.size = {100, 100};
  src_desc.storage_mode = StorageMode::kHostVisible;
  auto src = context->GetResourceAllocator()->CreateTexture(src_desc);

  TextureDescriptor dst_format;
  dst_format.format = PixelFormat::kR8G8B8A8UNormInt;
  dst_format.size = {100, 100};
  dst_format.storage_mode = StorageMode::kHostVisible;
  auto dst = context->GetResourceAllocator()->CreateTexture(dst_format);

  EXPECT_FALSE(blit_pass->AddCopy(src, dst));
}