binder: Fix a "fail the setup transaction" test case. (#12434)

The setup transaction hasn't actually been failing in this test case
since #8987. That's when I changed Robolectric tests to start ignoring
the return value of transact() to match how real Android doesn't expose
the peers' return value for 'oneway' cross-process transactions. The fix is
as simple as mocking transact() to throw rather than return false.

Author: jdcormie

binder/src/test/java/io/grpc/binder/internal/BinderServerTransportTest.java

@@ -20,17 +20,21 @@
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyInt;
 import static org.mockito.ArgumentMatchers.isNull;
-import static org.mockito.Mockito.when;
+import static org.mockito.Mockito.doThrow;
 import static org.robolectric.Shadows.shadowOf;
 
 import android.os.IBinder;
 import android.os.Looper;
 import android.os.Parcel;
+import android.os.RemoteException;
 import com.google.common.collect.ImmutableList;
 import io.grpc.Attributes;
+import io.grpc.ServerStreamTracer;
 import io.grpc.Status;
 import io.grpc.internal.FixedObjectPool;
 import io.grpc.internal.MockServerTransportListener;
+import io.grpc.internal.ObjectPool;
+import java.util.List;
 import java.util.concurrent.ScheduledExecutorService;
 import org.junit.Before;
 import org.junit.Rule;
@@ -60,26 +64,74 @@ public final class BinderServerTransportTest {
 
   @Before
   public void setUp() throws Exception {
-    transport =
-        new BinderServerTransport(
-            new FixedObjectPool<>(executorService),
-            Attributes.EMPTY,
-            ImmutableList.of(),
-            OneWayBinderProxy.IDENTITY_DECORATOR,
-            mockBinder);
     transportListener = new MockServerTransportListener(transport);
   }
 
+  // Provide defaults so that we can "include only relevant details in tests."
+  BinderServerTransportBuilder newBinderServerTransportBuilder() {
+    return new BinderServerTransportBuilder()
+        .setExecutorServicePool(new FixedObjectPool<>(executorService))
+        .setAttributes(Attributes.EMPTY)
+        .setStreamTracerFactories(ImmutableList.of())
+        .setBinderDecorator(OneWayBinderProxy.IDENTITY_DECORATOR)
+        .setCallbackBinder(mockBinder);
+  }
+
   @Test
-  public void testSetupTransactionFailureCausesMultipleShutdowns_b153460678() throws Exception {
+  public void testSetupTransactionFailureReportsMultipleTerminations_b153460678() throws Exception {
     // Make the binder fail the setup transaction.
-    when(mockBinder.transact(anyInt(), any(Parcel.class), isNull(), anyInt())).thenReturn(false);
+    doThrow(new RemoteException())
+        .when(mockBinder)
+        .transact(anyInt(), any(Parcel.class), isNull(), anyInt());
+    transport = newBinderServerTransportBuilder().setCallbackBinder(mockBinder).build();
+    shadowOf(Looper.getMainLooper()).idle();
     transport.start(transportListener);
 
-    // Now shut it down.
+    // Now shut it down externally *before* executing Runnables scheduled on the executor.
     transport.shutdownNow(Status.UNKNOWN.withDescription("reasons"));
     shadowOf(Looper.getMainLooper()).idle();
 
     assertThat(transportListener.isTerminated()).isTrue();
   }
+
+  static class BinderServerTransportBuilder {
+    ObjectPool<ScheduledExecutorService> executorServicePool;
+    Attributes attributes;
+    List<ServerStreamTracer.Factory> streamTracerFactories;
+    OneWayBinderProxy.Decorator binderDecorator;
+    IBinder callbackBinder;
+
+    public BinderServerTransport build() {
+      return new BinderServerTransport(
+          executorServicePool, attributes, streamTracerFactories, binderDecorator, callbackBinder);
+    }
+
+    public BinderServerTransportBuilder setExecutorServicePool(
+        ObjectPool<ScheduledExecutorService> executorServicePool) {
+      this.executorServicePool = executorServicePool;
+      return this;
+    }
+
+    public BinderServerTransportBuilder setAttributes(Attributes attributes) {
+      this.attributes = attributes;
+      return this;
+    }
+
+    public BinderServerTransportBuilder setStreamTracerFactories(
+        List<ServerStreamTracer.Factory> streamTracerFactories) {
+      this.streamTracerFactories = streamTracerFactories;
+      return this;
+    }
+
+    public BinderServerTransportBuilder setBinderDecorator(
+        OneWayBinderProxy.Decorator binderDecorator) {
+      this.binderDecorator = binderDecorator;
+      return this;
+    }
+
+    public BinderServerTransportBuilder setCallbackBinder(IBinder callbackBinder) {
+      this.callbackBinder = callbackBinder;
+      return this;
+    }
+  }
 }