Add a validation test for compressed texture with mipmaps

Compressed textures (BC formats) can support full or partial mip chains.
This tiny change adds a validation test to ensure it.

Bug: dawn:558
Change-Id: I584b65b7d049a3f188e3b56ca5c9ff36748151ae
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/42004
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Yunchao He <yunchao.he@intel.com>

src/dawn_native/Texture.cpp

@@ -440,8 +440,7 @@ namespace dawn_native {
     }
     uint32_t TextureBase::GetHeight() const {
         ASSERT(!IsError());
-        ASSERT(mDimension == wgpu::TextureDimension::e2D ||
-               mDimension == wgpu::TextureDimension::e3D);
+        ASSERT(mDimension != wgpu::TextureDimension::e1D);
         return mSize.height;
     }
     uint32_t TextureBase::GetDepth() const {

src/tests/unittests/validation/TextureValidationTests.cpp

@@ -575,6 +575,17 @@ namespace {
         }
     }
 
+    TEST_F(CompressedTextureFormatsValidationTests, MipLevelCount) {
+        for (wgpu::TextureFormat format : utils::kBCFormats) {
+            for (uint32_t mipLevels : {1, 3, 6}) {
+                wgpu::TextureDescriptor descriptor = CreateDefaultTextureDescriptor();
+                descriptor.format = format;
+                descriptor.mipLevelCount = mipLevels;
+                device.CreateTexture(&descriptor);
+            }
+        }
+    }
+
     // Test the validation of sample count when creating textures in compressed texture formats.
     // It is invalid to specify SampleCount > 1 when we create a texture in BC formats.
     TEST_F(CompressedTextureFormatsValidationTests, SampleCount) {