[JUnit 5] Migrate tests which can be easily converted (#2878)

JUnit 4 -> 5 migrations are often done in a 3-step process:

1. Update dependencies to JUnit 5, including the vintage module, causing all tests to leverage the new JUnit 5 Platform (completed in #2850)
2. Incrementally migrate JUnit 4 tests to JUnit 5 tests
3. Once no JUnit 4 usage remains, remove the dependency on the vintage module

This PR begins step 2 by migrating tests which can be easily converted.

IntelliJ provides a convenient way to migrate tests but unfortunately there is no support for automatically migrating JUnit 4 tests which leverage any of the following:

1. The `expected` parameter in test annotations
2. The `timeout` parameter in test annotations
3. The class-level `@RunWith` annotation (e.g., `@RunWith(Parameterized.class)` and `@RunWith(MockitoJUnitRunner.class)`)

Therefore, this PR leverages the migrate functionality but defers the above scenarios as follows:

```
grep -r -e "@test(" -e "@RunWith(" . | cut -d ':' -f1 | xargs -I {} git restore {}
```

All changes in this PR are fully automated with the migrate functionality, except for the changes to the top-level pom.xml to add `org.junit.*` to both `ignoredUsedUndeclaredDependency` and `ignoredUnusedDeclaredDependency`.

Additionally, there were a few cases of the migrate functionality migrating a superclass but not being able to migrate a subclass (due to the above limitations). The superclass was restored in this case.

Author: Bennett-Lynch

codegen-lite/src/test/java/software/amazon/awssdk/codegen/lite/regions/RegionGenerationTest.java

@@ -19,8 +19,8 @@
 
 import java.io.File;
 import java.nio.file.Paths;
-import org.junit.Before;
-import org.junit.Test;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
 import software.amazon.awssdk.codegen.lite.regions.model.Partition;
 import software.amazon.awssdk.codegen.lite.regions.model.Partitions;
 
@@ -35,7 +35,7 @@ public class RegionGenerationTest {
     private File endpoints;
     private Partitions partitions;
 
-    @Before
+    @BeforeEach
     public void before() throws Exception {
         this.endpoints = Paths.get(getClass().getResource(ENDPOINTS).toURI()).toFile();
         this.partitions = RegionMetadataLoader.build(endpoints);

codegen-lite/src/test/java/software/amazon/awssdk/codegen/lite/regions/RegionValidationUtilTest.java

@@ -17,7 +17,7 @@
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 public class RegionValidationUtilTest {
 

codegen/src/test/java/software/amazon/awssdk/codegen/IntermediateModelBuilderTest.java

@@ -21,7 +21,7 @@
 import static org.junit.Assert.assertTrue;
 
 import java.io.File;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 import software.amazon.awssdk.codegen.model.config.customization.CustomizationConfig;
 import software.amazon.awssdk.codegen.model.intermediate.IntermediateModel;
 import software.amazon.awssdk.codegen.model.intermediate.ShapeModel;

codegen/src/test/java/software/amazon/awssdk/codegen/customization/processors/UseLegacyEventGenerationSchemeProcessorTest.java

@@ -17,9 +17,9 @@
 
 
 import java.io.File;
-import org.junit.BeforeClass;
+import org.junit.jupiter.api.BeforeAll;
 import org.junit.Rule;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 import org.junit.rules.ExpectedException;
 import software.amazon.awssdk.codegen.C2jModels;
 import software.amazon.awssdk.codegen.IntermediateModelBuilder;
@@ -42,7 +42,7 @@ public class UseLegacyEventGenerationSchemeProcessorTest {
     private static ServiceModel serviceModel;
 
 
-    @BeforeClass
+    @BeforeAll
     public static void setup() {
         String c2jFilePath = UseLegacyEventGenerationSchemeProcessorTest.class.getResource(RESOURCE_ROOT + "/service-2.json").getFile();
         File c2jFile = new File(c2jFilePath);

codegen/src/test/java/software/amazon/awssdk/codegen/emitters/CodeTransformerTest.java

@@ -20,7 +20,7 @@
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 public class CodeTransformerTest {
 

codegen/src/test/java/software/amazon/awssdk/codegen/emitters/PoetGeneratorTaskIntegrationTest.java

@@ -31,8 +31,8 @@
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
-import org.junit.After;
-import org.junit.Test;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Test;
 import software.amazon.awssdk.codegen.poet.ClassSpec;
 
 public final class PoetGeneratorTaskIntegrationTest {
@@ -54,7 +54,7 @@ public void canGenerateJavaClass() throws Exception {
         assertThat(contents, both(containsString(PACKAGE)).and(startsWith(fileHeader)));
     }
 
-    @After
+    @AfterEach
     public void cleanUp() {
         tempDirectories.forEach(safeConsumer(tempDir -> {
             List<Path> files = Files.walk(Paths.get(tempDir)).collect(toList());

codegen/src/test/java/software/amazon/awssdk/codegen/emitters/UnusedImportRemoverTest.java

@@ -21,7 +21,7 @@
 
 import java.nio.file.Files;
 import java.nio.file.Paths;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 public class UnusedImportRemoverTest {
 

codegen/src/test/java/software/amazon/awssdk/codegen/internal/DocumentationUtilsTest.java

@@ -16,7 +16,7 @@
 
 import org.hamcrest.Matchers;
 import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 
 public class DocumentationUtilsTest {

codegen/src/test/java/software/amazon/awssdk/codegen/internal/UtilsTest.java

@@ -21,7 +21,7 @@
 
 import java.util.HashMap;
 import java.util.Map;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 public class UtilsTest {
     final Map<String,String> capitalizedToUncapitalized = new HashMap<String,String>() {{

codegen/src/test/java/software/amazon/awssdk/codegen/jmespath/JmesPathParserTest.java

@@ -17,7 +17,7 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 import software.amazon.awssdk.codegen.jmespath.component.Comparator;
 import software.amazon.awssdk.codegen.jmespath.component.Expression;
 import software.amazon.awssdk.codegen.jmespath.parser.JmesPathParser;