Add a test for creating a 0-sized buffer.

This is valid in WebGPU but causes validation errors in backends.

Also make it an OOM error on Metal to request a buffer close to
UINT32_MAX size because it would truncate the size, and could lead to
OOBs.

Bug: chromium:1069076
Change-Id: Ib961cb236cb7cabc0ae21203bf1d72ba82a56272
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/21060
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Stephen White <senorblanco@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

src/tests/end2end/BufferTests.cpp

@@ -581,3 +581,18 @@ DAWN_INSTANTIATE_TEST(CreateBufferMappedTests,
                       MetalBackend(),
                       OpenGLBackend(),
                       VulkanBackend());
+
+class BufferTests : public DawnTest {};
+
+TEST_P(BufferTests, ZeroSizedBuffer) {
+    wgpu::BufferDescriptor desc;
+    desc.size = 0;
+    desc.usage = wgpu::BufferUsage::CopyDst;
+    device.CreateBuffer(&desc);
+}
+
+DAWN_INSTANTIATE_TEST(BufferTests,
+                      D3D12Backend(),
+                      MetalBackend(),
+                      OpenGLBackend(),
+                      VulkanBackend());