LayoutTests/fast/webgpu/invalid-command-encoder-clear-buffer.html

<!-- webkit-test-runner [ WebGPUEnabled=true ] -->
<script src="../../resources/js-test.js"></script>
<script>
window.jsTestIsAsync = true;

async function run() {
    const adapter = await navigator.gpu.requestAdapter();
    const device = await adapter.requestDevice();
    const buffer = device.createBuffer({
        size: 4,
        usage: GPUBufferUsage.COPY_SRC | GPUBufferUsage.COPY_DST,
    });

    device.pushErrorScope("validation");

    const commandEncoder = device.createCommandEncoder();
    commandEncoder.copyBufferToBuffer(buffer, 0, buffer, 0, 4);
    commandEncoder.clearBuffer(buffer, 0, 4);
    commandEncoder.finish();

    const validationError = await device.popErrorScope();
    if (validationError instanceof GPUValidationError)
        testPassed("Finishing the invalid command encoder generated a validation error.");
    else
        testFailed("Finishing the invalid command encoder should generate a validation error.");
}

run().catch((error) => testFailed(`Unexpected exception: ${error}`)).finally(finishJSTest);
</script>