1 files changed, 53 insertions, 0 deletions
diff --git a/dom/webgpu/tests/cts/checkout/src/webgpu/compat/api/validation/render_pipeline/depth_stencil_state.spec.ts b/dom/webgpu/tests/cts/checkout/src/webgpu/compat/api/validation/render_pipeline/depth_stencil_state.spec.ts
new file mode 100644
index 0000000000..66045c2b8a
--- /dev/null
+++ b/dom/webgpu/tests/cts/checkout/src/webgpu/compat/api/validation/render_pipeline/depth_stencil_state.spec.ts
@@ -0,0 +1,53 @@
+export const description = `
+Tests that depthBiasClamp must be zero in compat mode.
+`;
+
+import { makeTestGroup } from '../../../../../common/framework/test_group.js';
+import { CompatibilityTest } from '../../../compatibility_test.js';
+
+export const g = makeTestGroup(CompatibilityTest);
+
+g.test('depthBiasClamp')
+  .desc('Tests that depthBiasClamp must be zero in compat mode.')
+  .params(u =>
+    u //
+      .combine('depthBiasClamp', [undefined, 0, 0.1, 1])
+      .combine('async', [false, true] as const)
+  )
+  .fn(t => {
+    const { depthBiasClamp, async } = t.params;
+
+    const module = t.device.createShaderModule({
+      code: `
+        @vertex fn vs() -> @builtin(position) vec4f {
+            return vec4f(0);
+        }
+
+        @fragment fn fs() -> @location(0) vec4f {
+            return vec4f(0);
+        }
+      `,
+    });
+
+    const pipelineDescriptor: GPURenderPipelineDescriptor = {
+      layout: 'auto',
+      vertex: {
+        module,
+        entryPoint: 'vs',
+      },
+      fragment: {
+        module,
+        entryPoint: 'fs',
+        targets: [{ format: 'rgba8unorm' }],
+      },
+      depthStencil: {
+        format: 'depth24plus',
+        depthWriteEnabled: true,
+        depthCompare: 'always',
+        ...(depthBiasClamp !== undefined && { depthBiasClamp }),
+      },
+    };
+
+    const success = !depthBiasClamp;
+    t.doCreateRenderPipelineTest(async, success, pipelineDescriptor);
+  });