content: /*
   * 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 org.apache.kafka.message;
  
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.Timeout;
  import org.junit.jupiter.api.io.TempDir;
  
  import java.io.BufferedWriter;
  import java.io.StringWriter;
  import java.nio.file.Path;
  import java.util.Arrays;
  import java.util.List;
  import java.util.Set;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  @Timeout(120)
  public class MessageGeneratorTest {
  
      @Test
      public void testCapitalizeFirst() {
          assertEquals("", MessageGenerator.capitalizeFirst(""));
          assertEquals("AbC", MessageGenerator.capitalizeFirst("abC"));
      }
  
      @Test
      public void testLowerCaseFirst() {
          assertEquals("", MessageGenerator.lowerCaseFirst(""));
          assertEquals("fORTRAN", MessageGenerator.lowerCaseFirst("FORTRAN"));
          assertEquals("java", MessageGenerator.lowerCaseFirst("java"));
      }
  
      @Test
      public void testFirstIsCapitalized() {
          assertFalse(MessageGenerator.firstIsCapitalized(""));
          assertTrue(MessageGenerator.firstIsCapitalized("FORTRAN"));
          assertFalse(MessageGenerator.firstIsCapitalized("java"));
      }
  
      @Test
      public void testToSnakeCase() {
          assertEquals("", MessageGenerator.toSnakeCase(""));
          assertEquals("foo_bar_baz", MessageGenerator.toSnakeCase("FooBarBaz"));
          assertEquals("foo_bar_baz", MessageGenerator.toSnakeCase("fooBarBaz"));
          assertEquals("fortran", MessageGenerator.toSnakeCase("FORTRAN"));
      }
  
      @Test
      public void stripSuffixTest() {
          assertEquals("FooBa", MessageGenerator.stripSuffix("FooBar", "r"));
          assertEquals("", MessageGenerator.stripSuffix("FooBar", "FooBar"));
          assertEquals("Foo", MessageGenerator.stripSuffix("FooBar", "Bar"));
          assertThrows(RuntimeException.class, () -> MessageGenerator.stripSuffix("FooBar", "Baz"));
      }
  
      @Test
      public void testConstants() {
          assertEquals(MessageGenerator.UNSIGNED_SHORT_MAX, 0xFFFF);
          assertEquals(MessageGenerator.UNSIGNED_INT_MAX, 0xFFFFFFFFL);
      }
  
      @Test
      public void testGenerateAndWriteMessageClasses(@TempDir Path tempDir) throws Exception {
          var generatorTypes = List.of("MessageDataGenerator", "JsonConverterGenerator");
  
          MessageSpec testRequestSpec = MessageGenerator.JSON_SERDE.readValue(String.join("", List.of(
                  "{",
                  "  \"apiKey\": 0,",
                  "  \"type\": \"request\",",
                  "  \"name\": \"FooBarRequest\",",
                  "  \"validVersions\": \"none\"",
                  "}")), MessageSpec.class);
          MessageSpec testResponseSpec = MessageGenerator.JSON_SERDE.readValue(String.join("", List.of(
                  "{",
                  "  \"apiKey\": 0,",
                  "  \"type\": \"response\",",
                  "  \"name\": \"FooBarRespose\",",
                  "  \"validVersions\": \"none\"",
                  "}")), MessageSpec.class);
  
          var outputFiles = MessageGenerator.generateAndWriteMessageClasses(testRequestSpec, "kafka",
              tempDir.toAbsolutePath().toString(), generatorTypes);
          assertEquals(Set.of(), outputFiles);
          outputFiles = MessageGenerator.generateAndWriteMessageClasses(testResponseSpec, "kafka",
                  tempDir.toAbsolutePath().toString(), generatorTypes);
          assertEquals(Set.of(), outputFiles);
          var typeGenerator = new ApiMessageTypeGenerator("kafka");
          typeGenerator.registerMessageType(testRequestSpec);
          typeGenerator.registerMessageType(testResponseSpec);
          typeGenerator.generateAndWrite(new BufferedWriter(new StringWriter()));
  
          testRequestSpec = MessageGenerator.JSON_SERDE.readValue(String.join("", Arrays.asList(
                  "{",
                  "  \"apiKey\": 0,",
                  "  \"type\": \"request\",",
                  "  \"name\": \"FooBarRequest\",",
                  "  \"validVersions\": \"0-2\",",
                  "  \"flexibleVersions\": \"none\",",
                  "  \"fields\": [",
                  "    { \"name\": \"field1\", \"type\": \"int32\", \"versions\": \"0+\" }",
                  "  ]",
                  "}")), MessageSpec.class);
          testResponseSpec = MessageGenerator.JSON_SERDE.readValue(String.join("", Arrays.asList(
                  "{",
                  "  \"apiKey\": 0,",
                  "  \"type\": \"response\",",
                  "  \"name\": \"FooBarResponse\",",
                  "  \"validVersions\": \"0-2\",",
                  "  \"flexibleVersions\": \"none\",",
                  "  \"fields\": [",
                  "    { \"name\": \"field1\", \"type\": \"int32\", \"versions\": \"0+\" }",
                  "  ]",
                  "}")), MessageSpec.class);
  
          outputFiles = MessageGenerator.generateAndWriteMessageClasses(testRequestSpec, "kafka",
                  tempDir.toAbsolutePath().toString(), generatorTypes);
          assertEquals(Set.of("FooBarRequestDataJsonConverter.java", "FooBarRequestData.java"), outputFiles);
          outputFiles = MessageGenerator.generateAndWriteMessageClasses(testResponseSpec, "kafka",
                  tempDir.toAbsolutePath().toString(), generatorTypes);
          assertEquals(Set.of("FooBarResponseDataJsonConverter.java", "FooBarResponseData.java"), outputFiles);
          typeGenerator = new ApiMessageTypeGenerator("kafka");
          typeGenerator.registerMessageType(testRequestSpec);
          typeGenerator.registerMessageType(testResponseSpec);
          typeGenerator.generateAndWrite(new BufferedWriter(new StringWriter()));
      }
  
  }
  