Add test for wgpu_device_supports_feature().

Author: juj

test/wgpu_device_supports_feature.cpp

@@ -0,0 +1,26 @@
+// flags: -sEXIT_RUNTIME=0
+
+#include "lib_webgpu.h"
+#include <assert.h>
+#include <stdio.h>
+
+void ObtainedWebGpuDevice(WGpuDevice device, void *userData)
+{
+  assert(wgpu_device_supports_feature(device, WGPU_FEATURE_SHADER_F16));
+  assert(wgpu_device_supports_feature(device, WGPU_FEATURE_DEPTH_CLIP_CONTROL));
+  assert(!wgpu_device_supports_feature(device, WGPU_FEATURE_DEPTH32FLOAT_STENCIL8)); // We did not ask for this feature.
+
+  EM_ASM(window.close());
+}
+
+void ObtainedWebGpuAdapter(WGpuAdapter adapter, void *userData)
+{
+  WGpuDeviceDescriptor desc = {};
+  desc.requiredFeatures = WGPU_FEATURE_SHADER_F16 | WGPU_FEATURE_DEPTH_CLIP_CONTROL; // Ask for two features. This test assumes that the test device can handle this.
+  wgpu_adapter_request_device_async(adapter, &desc, ObtainedWebGpuDevice, 0);
+}
+
+int main()
+{
+  navigator_gpu_request_adapter_async_simple(ObtainedWebGpuAdapter);
+}