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.Dispatchers
import kotlinx.coroutines.ExecutorCoroutineDispatcher
import kotlinx.coroutines.asCoroutineDispatcher
import kotlinx.coroutines.cancel
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 {
        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()
      }
    }
  }
}