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.grid.node.local;
  
  import static java.nio.charset.StandardCharsets.UTF_8;
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.openqa.selenium.json.Json.MAP_TYPE;
  import static org.openqa.selenium.remote.Dialect.W3C;
  import static org.openqa.selenium.remote.http.Contents.utf8String;
  import static org.openqa.selenium.remote.http.HttpMethod.POST;
  
  import com.google.common.collect.ImmutableMap;
  import com.google.common.collect.ImmutableSet;
  import java.net.URI;
  import java.net.URISyntaxException;
  import java.time.Instant;
  import java.util.Map;
  import org.junit.jupiter.api.Test;
  import org.openqa.selenium.Capabilities;
  import org.openqa.selenium.ImmutableCapabilities;
  import org.openqa.selenium.WebDriverException;
  import org.openqa.selenium.events.local.GuavaEventBus;
  import org.openqa.selenium.grid.data.CreateSessionRequest;
  import org.openqa.selenium.grid.data.CreateSessionResponse;
  import org.openqa.selenium.grid.data.Session;
  import org.openqa.selenium.grid.node.Node;
  import org.openqa.selenium.grid.security.Secret;
  import org.openqa.selenium.grid.testing.TestSessionFactory;
  import org.openqa.selenium.internal.Either;
  import org.openqa.selenium.json.Json;
  import org.openqa.selenium.remote.http.HttpRequest;
  import org.openqa.selenium.remote.tracing.DefaultTestTracer;
  
  class CreateSessionTest {
  
    private final Json json = new Json();
    private final Capabilities stereotype = new ImmutableCapabilities("cheese", "brie");
    private final Secret registrationSecret = new Secret("tunworth");
  
    @Test
    void shouldAcceptAW3CPayload() throws URISyntaxException {
      String payload =
          json.toJson(
              ImmutableMap.of(
                  "capabilities", ImmutableMap.of("alwaysMatch", ImmutableMap.of("cheese", "brie"))));
  
      HttpRequest request = new HttpRequest(POST, "/session");
      request.setContent(utf8String(payload));
  
      URI uri = new URI("http://example.com");
  
      Node node =
          LocalNode.builder(
                  DefaultTestTracer.createTracer(), new GuavaEventBus(), uri, uri, registrationSecret)
              .add(
                  stereotype,
                  new TestSessionFactory(
                      (id, caps) ->
                          new Session(id, uri, new ImmutableCapabilities(), caps, Instant.now())))
              .build();
  
      Either<WebDriverException, CreateSessionResponse> response =
          node.newSession(
              new CreateSessionRequest(ImmutableSet.of(W3C), stereotype, ImmutableMap.of()));
  
      if (response.isRight()) {
        CreateSessionResponse sessionResponse = response.right();
        Map<String, Object> all =
            json.toType(new String(sessionResponse.getDownstreamEncodedResponse(), UTF_8), MAP_TYPE);
  
        // Ensure that there's no status field (as this is used by the protocol handshake to determine
        // whether the session is using the JWP or the W3C dialect).
        assertThat(all.containsKey("status")).isFalse();
  
        // Now check the fields required by the spec
        Map<?, ?> value = (Map<?, ?>) all.get("value");
        assertThat(value.get("sessionId")).isInstanceOf(String.class);
        assertThat(value.get("capabilities")).isInstanceOf(Map.class);
      } else {
        throw new AssertionError("Unable to create session" + response.left().getMessage());
      }
    }
  
    @Test
    void shouldOnlyAcceptAJWPPayloadIfConfiguredTo() {
      // TODO: implement shouldOnlyAcceptAJWPPayloadIfConfiguredTo test
    }
  
    @Test
    void ifOnlyW3CPayloadSentAndRemoteEndIsJWPOnlyFailSessionCreationIfJWPNotConfigured() {
      // TODO: implement
      // ifOnlyW3CPayloadSentAndRemoteEndIsJWPOnlyFailSessionCreationIfJWPNotConfigured test
    }
  
    @Test
    void shouldPreferUsingTheW3CProtocol() throws URISyntaxException {
      String payload =
          json.toJson(
              ImmutableMap.of(
                  "desiredCapabilities", ImmutableMap.of("cheese", "brie"),
                  "capabilities", ImmutableMap.of("alwaysMatch", ImmutableMap.of("cheese", "brie"))));
  
      HttpRequest request = new HttpRequest(POST, "/session");
      request.setContent(utf8String(payload));
  
      URI uri = new URI("http://example.com");
  
      Node node =
          LocalNode.builder(
                  DefaultTestTracer.createTracer(), new GuavaEventBus(), uri, uri, registrationSecret)
              .add(
                  stereotype,
                  new TestSessionFactory(
                      (id, caps) ->
                          new Session(id, uri, new ImmutableCapabilities(), caps, Instant.now())))
              .build();
  
      Either<WebDriverException, CreateSessionResponse> response =
          node.newSession(
              new CreateSessionRequest(ImmutableSet.of(W3C), stereotype, ImmutableMap.of()));
  
      if (response.isRight()) {
        CreateSessionResponse sessionResponse = response.right();
        Map<String, Object> all =
            json.toType(new String(sessionResponse.getDownstreamEncodedResponse(), UTF_8), MAP_TYPE);
  
        // Ensure that there's no status field (as this is used by the protocol handshake to determine
        // whether the session is using the JWP or the W3C dialect).
        assertThat(all.containsKey("status")).isFalse();
  
        // Now check the fields required by the spec
        Map<?, ?> value = (Map<?, ?>) all.get("value");
        assertThat(value.get("sessionId")).isInstanceOf(String.class);
        assertThat(value.get("capabilities")).isInstanceOf(Map.class);
      } else {
        throw new AssertionError("Unable to create session" + response.left().getMessage());
      }
    }
  
    @Test
    void sessionDataShouldBeCorrectRegardlessOfPayloadProtocol() {
      // TODO: implement sessionDataShouldBeCorrectRegardlessOfPayloadProtocol test
    }
  
    @Test
    void shouldSupportProtocolConversion() {
      // TODO: implement shouldSupportProtocolConversion test
    }
  }
  