Fix several silently failing tests (#2767)

* Add missing expected.txt for test

* Diagnostics -> StdWriters in render test

* Allow specifying several test prefixes to run

`slang-test -- tests/foo tests/bar`

* Squash warnings in some tests

* Enable gfx debug layer in gfx test util

Makes this issue present consistently: https://github.com/shader-slang/slang/issues/2766

* Allow DebugDevice to return interfaces instantiated by the debugged object

* Check that we actaully have a shader cache for shader cache tests

---------

Co-authored-by: Yong He <yonghe@outlook.com>

2 files changed, 9 insertions, 1 deletions

diff --git a/tools/gfx-unit-test/gfx-test-util.cpp b/tools/gfx-unit-test/gfx-test-util.cpp
index 5cbb30e71..fcebdda9f 100644
--- a/tools/gfx-unit-test/gfx-test-util.cpp
+++ b/tools/gfx-unit-test/gfx-test-util.cpp
@@ -239,6 +239,13 @@ namespace gfx_test
         void* extDescPtr = &extDesc;
         deviceDesc.extendedDescs = &extDescPtr;
 
+        // TODO: We should also set the debug callback
+        // (And in general reduce the differences (and duplication) between
+        // here and render-test-main.cpp)
+#ifdef _DEBUG
+        gfx::gfxEnableDebugLayer();
+#endif
+
         auto createDeviceResult = gfxCreateDevice(&deviceDesc, device.writeRef());
         if (SLANG_FAILED(createDeviceResult))
         {
diff --git a/tools/gfx-unit-test/shader-cache-tests.cpp b/tools/gfx-unit-test/shader-cache-tests.cpp
index e1607ac59..de699c2d6 100644
--- a/tools/gfx-unit-test/shader-cache-tests.cpp
+++ b/tools/gfx-unit-test/shader-cache-tests.cpp
@@ -141,7 +141,8 @@ namespace gfx_test
                 [this, func] (IDevice* device, UnitTestContext* ctx)
                 {
                     this->device = device;
-                    device->queryInterface(SLANG_UUID_IShaderCache, (void**)this->shaderCache.writeRef());
+                    SLANG_CHECK_ABORT(SLANG_SUCCEEDED(
+                        device->queryInterface(SLANG_UUID_IShaderCache, (void**)this->shaderCache.writeRef())));
                     func();
                     this->device = nullptr;
                     this->shaderCache = nullptr;