test: refactor CRD generator tests to use final var for local variables

Signed-off-by: David Sondermann <david.sondermann@hivemq.com>

Author: Donnerbart

java-generator/core/src/test/java/io/fabric8/java/generator/ApprovalTest.java

@@ -19,16 +19,15 @@
 import io.fabric8.kubernetes.api.model.apiextensions.v1.CustomResourceDefinition;
 import io.fabric8.kubernetes.client.utils.Serialization;
 import org.approvaltests.Approvals;
-import org.approvaltests.namer.NamedEnvironment;
 import org.approvaltests.namer.NamerFactory;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
 
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.stream.Stream;
 
 import static io.fabric8.java.generator.CRGeneratorRunner.groupToPackage;
@@ -47,33 +46,32 @@ private static Stream<Arguments> getCRDGenerationInputData() {
             new Config()),
         Arguments.of("testCalicoIPPoolCrd", "calico-ippool-crd.yml", "IPPool", "CalicoIPPoolCr", new Config()),
         Arguments.of("testExistingJavaType", "existing-java-type-crd.yml", "ExistingJavaType", "ExistingJavaTypeCr",
-            Config.builder().existingJavaTypes(Collections.singletonMap(
-                "org.test.v1.existingjavatypespec.Affinity", "io.fabric8.kubernetes.api.model.Affinity")).build()));
+            Config.builder().existingJavaTypes(
+                Map.of("org.test.v1.existingjavatypespec.Affinity", "io.fabric8.kubernetes.api.model.Affinity")).build()));
   }
 
   @ParameterizedTest
   @MethodSource("getCRDGenerationInputData")
   void generate_withValidCrd_shouldGeneratePojos(String parameter, String crdYaml, String customResourceName,
       String approvalLabel, Config config) {
-    try (NamedEnvironment en = NamerFactory.withParameters(parameter)) {
+    try (var ignored = NamerFactory.withParameters(parameter)) {
       // Arrange
-      CRGeneratorRunner runner = new CRGeneratorRunner(config);
-      CustomResourceDefinition crd = getCRD(crdYaml);
+      final var runner = new CRGeneratorRunner(config);
+      final var crd = getCRD(crdYaml);
 
       // Act
-      List<WritableCRCompilationUnit> writables = runner.generate(crd, groupToPackage("test.org"));
+      final var writables = runner.generate(crd, groupToPackage("test.org"));
 
       // Assert
       assertThat(writables).hasSize(1);
 
-      WritableCRCompilationUnit writable = writables.get(0);
-
-      List<String> underTest = new ArrayList<>();
-      List<GeneratorResult.ClassResult> crl = writable.getClassResults();
+      final var writable = writables.get(0);
+      final var underTest = new ArrayList<>();
+      final var crl = writable.getClassResults();
       underTest.add(getJavaClass(crl, customResourceName));
       underTest.add(getJavaClass(crl, customResourceName + "Spec"));
       // not all the tested CRDs have a status definition, e.g. see calico-ippool-crd.yml
-      final String statusCrlName = customResourceName + "Status";
+      final var statusCrlName = customResourceName + "Status";
       if (crl.stream().anyMatch(c -> c.getName().equals(statusCrlName))) {
         underTest.add(getJavaClass(crl, statusCrlName));
       }
@@ -82,13 +80,10 @@ void generate_withValidCrd_shouldGeneratePojos(String parameter, String crdYaml,
   }
 
   private CustomResourceDefinition getCRD(String name) {
-    return Serialization.unmarshal(
-        this.getClass().getClassLoader().getResourceAsStream(name),
-        CustomResourceDefinition.class);
+    return Serialization.unmarshal(getClass().getClassLoader().getResourceAsStream(name), CustomResourceDefinition.class);
   }
 
   private String getJavaClass(List<GeneratorResult.ClassResult> classResults, String name) {
-    GeneratorResult.ClassResult cr = classResults.stream().filter(c -> c.getName().equals(name)).findFirst().get();
-    return cr.getJavaSource();
+    return classResults.stream().filter(c -> c.getName().equals(name)).findFirst().orElseThrow().getJavaSource();
   }
 }

java-generator/core/src/test/java/io/fabric8/java/generator/CompilationTest.java

@@ -28,10 +28,7 @@
 import org.junit.jupiter.params.provider.MethodSource;
 
 import java.io.File;
-import java.io.IOException;
-import java.net.URL;
 import java.nio.file.Files;
-import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.List;
@@ -82,11 +79,11 @@ private static Stream<Arguments> compilationTestData() {
   @MethodSource("compilationTestData")
   void yamlCompiles(String yamlFile, int expectedGeneratedSourceFiles) throws Exception {
     // Arrange
-    File crd = getCRD(yamlFile);
+    final var crd = getCRD(yamlFile);
 
     // Act
     new FileJavaGenerator(config, crd).run(tempDir);
-    Compilation compilation = javac().compile(getSources(tempDir));
+    final var compilation = javac().compile(getSources(tempDir));
 
     // Assert
     assertThat(compilation.errors()).isEmpty();
@@ -98,14 +95,14 @@ void yamlCompiles(String yamlFile, int expectedGeneratedSourceFiles) throws Exce
   @Test
   void testCrontabCRDCompilesWithExtraAnnotations() throws Exception {
     // Arrange
-    File crd = getCRD("crontab-crd.yml");
+    final var crd = getCRD("crontab-crd.yml");
     config = config.toBuilder()
         .objectExtraAnnotations(true)
         .build();
 
     // Act
     new FileJavaGenerator(config, crd).run(tempDir);
-    Compilation compilation = javac()
+    final var compilation = javac()
         .withProcessors(new BuildableProcessor())
         .compile(getSources(tempDir));
 
@@ -118,7 +115,7 @@ void testCrontabCRDCompilesWithExtraAnnotations() throws Exception {
   @Test
   void testCalicoIPPoolCRDDoesNotCompileWhenDuplicatesAreNotDeprecated() throws Exception {
     // Arrange
-    File crd = getCRD("calico-ippool-broken-crd.yml");
+    final var crd = getCRD("calico-ippool-broken-crd.yml");
     config = config.toBuilder()
         .objectExtraAnnotations(true)
         .build();
@@ -132,11 +129,11 @@ void testCalicoIPPoolCRDDoesNotCompileWhenDuplicatesAreNotDeprecated() throws Ex
         .isInstanceOf(JavaGeneratorException.class);
   }
 
-  static List<JavaFileObject> getSources(File basePath) throws IOException {
-    List<JavaFileObject> sources = new ArrayList<>();
-    try (Stream<Path> pathStream = Files.list(basePath.toPath())) {
-      for (Path path : pathStream.collect(Collectors.toList())) {
-        File file = path.toFile();
+  static List<JavaFileObject> getSources(File basePath) throws Exception {
+    final var sources = new ArrayList<JavaFileObject>();
+    try (final var pathStream = Files.list(basePath.toPath())) {
+      for (final var path : pathStream.collect(Collectors.toList())) {
+        final var file = path.toFile();
         if (file.isDirectory()) {
           sources.addAll(getSources(file));
         } else {
@@ -148,7 +145,7 @@ static List<JavaFileObject> getSources(File basePath) throws IOException {
   }
 
   static File getCRD(String name) throws Exception {
-    URL resource = CompilationTest.class.getClassLoader().getResource(name);
+    final var resource = CompilationTest.class.getClassLoader().getResource(name);
     assertThat(resource).isNotNull();
     return Paths.get(resource.toURI()).toFile();
   }

java-generator/core/src/test/java/io/fabric8/java/generator/ConfigTest.java

@@ -23,7 +23,7 @@ class ConfigTest {
 
   @Test
   void defaultValuesWithAllArgsConstructor() {
-    final Config result = new Config(null, null, null, null, null, null, null, null, null);
+    final var result = new Config(null, null, null, null, null, null, null, null, null);
     assertThat(result)
         .returns(Config.DEFAULT_UPPERCASE_ENUM, Config::isUppercaseEnums)
         .returns(Config.DEFAULT_ADD_EXTRA_ANNOTATIONS, Config::isObjectExtraAnnotations)
@@ -37,7 +37,7 @@ void defaultValuesWithAllArgsConstructor() {
 
   @Test
   void defaultValuesWithNoArgsConstructor() {
-    final Config result = new Config();
+    final var result = new Config();
     assertThat(result)
         .returns(Config.DEFAULT_UPPERCASE_ENUM, Config::isUppercaseEnums)
         .returns(Config.DEFAULT_ADD_EXTRA_ANNOTATIONS, Config::isObjectExtraAnnotations)
@@ -51,7 +51,7 @@ void defaultValuesWithNoArgsConstructor() {
 
   @Test
   void defaultValuesWithBuilder() {
-    final Config result = Config.builder().build();
+    final var result = Config.builder().build();
     assertThat(result)
         .returns(Config.DEFAULT_UPPERCASE_ENUM, Config::isUppercaseEnums)
         .returns(Config.DEFAULT_ADD_EXTRA_ANNOTATIONS, Config::isObjectExtraAnnotations)