tools/android/webgpu/src/androidTest/java/androidx/webgpu/FeaturesTest.kt

/*
 * Copyright 2025 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package androidx.webgpu

import androidx.test.ext.junit.runners.AndroidJUnit4
import androidx.test.filters.SmallTest
import androidx.webgpu.helper.createWebGpu
import java.util.concurrent.Executor
import java.util.concurrent.Executors
import kotlinx.coroutines.CoroutineDispatcher
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.ExecutorCoroutineDispatcher
import kotlinx.coroutines.asCoroutineDispatcher
import kotlinx.coroutines.launch
import kotlinx.coroutines.runBlocking
import org.junit.Test
import org.junit.runner.RunWith

@RunWith(AndroidJUnit4::class)
@SmallTest
class FeaturesTest {
  private val dispatcher: CoroutineDispatcher = Executors.newSingleThreadExecutor { runnable ->
    Thread(runnable, "Test-WebGPU-Thread")
  }.asCoroutineDispatcher()
  private val testScope = CoroutineScope(dispatcher)

  /**
   * Test that the features requested match the features in the adapter are present on the device.
   */
  @Test
  fun featuresTest() {
    val requiredFeatures = intArrayOf(FeatureName.TextureCompressionASTC)
    runBlocking {
      val webGpu =
        createWebGpu(
          dispatcher = dispatcher,
          deviceDescriptor = GPUDeviceDescriptor(
            requiredFeatures = requiredFeatures,
            deviceLostCallback = null,
            deviceLostCallbackExecutor = Executor(Runnable::run),
            uncapturedErrorCallback = null,
            uncapturedErrorCallbackExecutor = Executor(Runnable::run)
          )
        )
      val device = webGpu.device
      val job = testScope.launch {
        webGpu.processEventsLoop()
      }
      try {
        val unused = webGpu.execute {
          val deviceFeatures = device.getFeatures().features
          requiredFeatures.forEach {
            assert(deviceFeatures.contains(it)) { "Requested feature $it available on device" }
          }
        }
      } finally {
        webGpu.close()
        job.cancel()
        (dispatcher as? ExecutorCoroutineDispatcher)?.close()
      }
    }
  }
}