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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 zipkin2.storage;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import zipkin2.Span;
import zipkin2.TestObjects;

import static java.util.Arrays.asList;
import static org.assertj.core.api.Assertions.assertThat;
import static zipkin2.storage.ITSpanStore.requestBuilder;
import static zipkin2.storage.ITSpanStore.sortTrace;
import static zipkin2.storage.ITSpanStore.sortTraces;

/**
 * Base test for when {@link StorageComponent.Builder#strictTraceId(boolean) strictTraceId ==
 * false}.
 *
 * Subtypes should create a connection to a real backend, even if that backend is in-process.
 *
 * This is a replacement for {@code zipkin.storage.StrictTraceIdFalseTest}.
 */
public abstract class ITStrictTraceIdFalse {

  /** Should maintain state between multiple calls within a test. */
  protected abstract StorageComponent storage();

  protected SpanStore store() {
    return storage().spanStore();
  }

  /** Clears store between tests. */
  @Before public abstract void clear() throws Exception;

  /** Ensures we can still lookup fully 128-bit traces when strict trace ID id disabled */
  @Test public void getTraces_128BitTraceId() throws IOException {
    getTraces_128BitTraceId(accept128BitTrace(storage()));
  }

  @Test public void getTraces_128BitTraceId_mixed() throws IOException {
    getTraces_128BitTraceId(acceptMixedTrace());
  }

  protected void getTraces_128BitTraceId(List trace) throws IOException {
    assertThat(sortTraces(store().getTraces(requestBuilder().build()).execute()))
      .containsExactly(trace);

    // search by 128-bit side's service and data
    assertThat(sortTraces(store().getTraces(requestBuilder()
      .serviceName(TestObjects.FRONTEND.serviceName())
      .parseAnnotationQuery("foo").build()).execute()))
      .containsExactly(trace);

    // search by 64-bit side's service and data
    assertThat(sortTraces(store().getTraces(requestBuilder()
      .serviceName(TestObjects.BACKEND.serviceName())
      .parseAnnotationQuery("error").build()).execute()))
      .containsExactly(trace);
  }

  @Test public void getTrace_retrievesBy64Or128BitTraceId() throws IOException {
    List trace = accept128BitTrace(storage());

    retrievesBy64Or128BitTraceId(trace);
  }

  @Test public void getTrace_retrievesBy64Or128BitTraceId_mixed() throws IOException {
    List trace = acceptMixedTrace();

    retrievesBy64Or128BitTraceId(trace);
  }

  void retrievesBy64Or128BitTraceId(List trace) throws IOException {
    assertThat(store().getTrace(trace.get(0).traceId().substring(16)).execute())
      .containsOnlyElementsOf(trace);
    assertThat(store().getTrace(trace.get(0).traceId()).execute())
      .containsOnlyElementsOf(trace);
  }

  protected List accept128BitTrace(StorageComponent storage) throws IOException {
    List trace = new ArrayList<>(TestObjects.TRACE);
    Collections.reverse(trace);
    storage.spanConsumer().accept(trace).execute();
    return TestObjects.TRACE;
  }

  List acceptMixedTrace() throws IOException {
    List trace = new ArrayList<>(TestObjects.TRACE);
    String downgraded = trace.get(0).traceId().substring(16);
    // iterate after the outbound client span, emulating a server that downgraded
    for (int i = 2; i < trace.size(); i++) {
      trace.set(i, trace.get(i).toBuilder().traceId(downgraded).build());
    }
    Collections.reverse(trace);
    accept(trace.toArray(new Span[0]));
    return sortTrace(trace);
  }

  void accept(Span... spans) throws IOException {
    storage().spanConsumer().accept(asList(spans)).execute();
  }
}