code: // Licensed to the Software Freedom Conservancy (SFC) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The SFC 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 org.openqa.selenium.remote;
  
  import static org.mockito.Mockito.times;
  import static org.mockito.Mockito.verify;
  import static org.mockito.Mockito.verifyNoMoreInteractions;
  import static org.mockito.Mockito.when;
  
  import java.io.IOException;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.UUID;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Tag;
  import org.junit.jupiter.api.Test;
  import org.mockito.Mock;
  import org.mockito.MockitoAnnotations;
  import org.openqa.selenium.remote.tracing.Span;
  import org.openqa.selenium.remote.tracing.TraceContext;
  import org.openqa.selenium.remote.tracing.Tracer;
  
  @Tag("UnitTests")
  class TracedCommandExecutorTest {
    @Mock private CommandExecutor commandExecutor;
    @Mock private Tracer tracer;
    @Mock private TraceContext traceContext;
    @Mock private Span span;
  
    private TracedCommandExecutor tracedCommandExecutor;
  
    @BeforeEach
    public void createMocksAndTracedCommandExecutor() {
      MockitoAnnotations.initMocks(this);
      when(tracer.getCurrentContext()).thenReturn(traceContext);
      when(traceContext.createSpan("command")).thenReturn(span);
      tracedCommandExecutor = new TracedCommandExecutor(commandExecutor, tracer);
    }
  
    @Test
    void canCreateSpanWithAllAttributes() throws IOException {
      SessionId sessionId = new SessionId(UUID.randomUUID());
      Map<String, Object> parameters = new HashMap<>();
      parameters.put("param1", "value1");
      parameters.put("param2", "value2");
      Command command = new Command(sessionId, "findElement", parameters);
  
      tracedCommandExecutor.execute(command);
  
      verify(span, times(1)).setAttribute("sessionId", sessionId.toString());
      verify(span, times(1)).setAttribute("command", "findElement");
      verify(span, times(1)).setAttribute("parameter.param1", "value1");
      verify(span, times(1)).setAttribute("parameter.param2", "value2");
      verify(span, times(1)).close();
      verifyNoMoreInteractions(span);
    }
  
    @Test
    void canCreateSpanFromNullParameter() throws IOException {
      SessionId sessionId = new SessionId(UUID.randomUUID());
      Map<String, Object> parameters = new HashMap<>();
      parameters.put("param1", null);
      Command command = new Command(sessionId, "findElement", parameters);
  
      tracedCommandExecutor.execute(command);
  
      verify(span, times(1)).setAttribute("sessionId", sessionId.toString());
      verify(span, times(1)).setAttribute("command", "findElement");
      verify(span, times(1)).setAttribute("parameter.param1", "null");
      verify(span, times(1)).close();
      verifyNoMoreInteractions(span);
    }
  
    @Test
    void canCreateSpanWithSessionIdAndCommandName() throws IOException {
      SessionId sessionId = new SessionId(UUID.randomUUID());
      Command command = new Command(sessionId, "findElement");
  
      tracedCommandExecutor.execute(command);
  
      verify(span, times(1)).setAttribute("sessionId", sessionId.toString());
      verify(span, times(1)).setAttribute("command", "findElement");
      verify(span, times(1)).close();
      verifyNoMoreInteractions(span);
    }
  
    @Test
    void canCreateSpanWithCommandName() throws IOException {
      Command command = new Command(null, "createSession");
  
      tracedCommandExecutor.execute(command);
  
      verify(span, times(1)).setAttribute("command", "createSession");
      verify(span, times(1)).close();
      verifyNoMoreInteractions(span);
    }
  }
  