protobuf/src/test/java/io/grpc/protobuf/ProtoUtilsTest.java

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package io.grpc.protobuf;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.fail;

import com.google.common.io.ByteStreams;
import com.google.protobuf.MessageLite;
import com.google.protobuf.Type;

import io.grpc.MethodDescriptor.Marshaller;
import io.grpc.Status;
import io.grpc.StatusRuntimeException;

import org.junit.Ignore;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

/** Unit tests for {@link ProtoUtils}. */
@RunWith(JUnit4.class)
public class ProtoUtilsTest {
  private Type proto = Type.newBuilder().setName("value").build();

  @Test
  public void testRoundtrip() throws Exception {
    Marshaller<Type> marshaller = ProtoUtils.marshaller(Type.getDefaultInstance());
    InputStream is = marshaller.stream(proto);
    is = new ByteArrayInputStream(ByteStreams.toByteArray(is));
    assertEquals(proto, marshaller.parse(is));
  }

  @Test
  @Deprecated
  public void testRoundtripLite() throws Exception {
    Marshaller<MessageLite> marshaller
        = ProtoUtils.marshaller((MessageLite) Type.getDefaultInstance());
    InputStream is = marshaller.stream(proto);
    is = new ByteArrayInputStream(ByteStreams.toByteArray(is));
    assertEquals(proto, marshaller.parse(is));
  }

  @Test
  public void keyForProto() {
    assertEquals("google.protobuf.Type-bin",
        ProtoUtils.keyForProto(Type.getDefaultInstance()).originalName());
  }

  @Test
  public void testJsonRoundtrip() throws Exception {
    Marshaller<Type> marshaller = ProtoUtils.jsonMarshaller(Type.getDefaultInstance());
    InputStream is = marshaller.stream(proto);
    is = new ByteArrayInputStream(ByteStreams.toByteArray(is));
    assertEquals(proto, marshaller.parse(is));
  }

  @Test
  public void testJsonRepresentation() throws Exception {
    Marshaller<Type> marshaller = ProtoUtils.jsonMarshaller(Type.getDefaultInstance());
    InputStream is = marshaller.stream(proto);
    String s = new String(ByteStreams.toByteArray(is), "UTF-8");
    assertEquals("{\"name\":\"value\"}", s.replaceAll("\\s", ""));
  }

  @Ignore("https://github.com/google/protobuf/issues/1470")
  @Test
  public void testJsonInvalid() throws Exception {
    Marshaller<Type> marshaller = ProtoUtils.jsonMarshaller(Type.getDefaultInstance());
    try {
      marshaller.parse(new ByteArrayInputStream("{]".getBytes("UTF-8")));
      fail("Expected exception");
    } catch (StatusRuntimeException ex) {
      assertEquals(Status.Code.INTERNAL, ex.getStatus().getCode());
      assertNotNull(ex.getCause());
    }
  }

  @Test
  public void testJsonInvalidProto() throws Exception {
    Marshaller<Type> marshaller = ProtoUtils.jsonMarshaller(Type.getDefaultInstance());
    try {
      marshaller.parse(new ByteArrayInputStream("{\"\":3}".getBytes("UTF-8")));
      fail("Expected exception");
    } catch (StatusRuntimeException ex) {
      assertEquals(Status.Code.INTERNAL, ex.getStatus().getCode());
      assertNotNull(ex.getCause());
    }
  }

  @Test
  public void testJsonIoException() throws Exception {
    Marshaller<Type> marshaller = ProtoUtils.jsonMarshaller(Type.getDefaultInstance());
    final IOException ioe = new IOException();
    try {
      marshaller.parse(new ByteArrayInputStream("{}".getBytes("UTF-8")) {
        @Override
        public void close() throws IOException {
          throw ioe;
        }
      });
      fail("Exception expected");
    } catch (StatusRuntimeException ex) {
      assertEquals(Status.Code.INTERNAL, ex.getStatus().getCode());
      assertEquals(ioe, ex.getCause());
    }
  }
}