Add JavadocPackageCheck to the default Spring checks

Closes gh-328

spring-javaformat-gradle/spring-javaformat-gradle-plugin/src/test/resources/check-ok/src/main/java/simple/package-info.java

@@ -0,0 +1 @@
+package simple;

spring-javaformat/spring-javaformat-checkstyle/src/main/resources/io/spring/javaformat/checkstyle/spring-checkstyle.xml

@@ -12,6 +12,7 @@
 		<property name="headerCopyrightPattern" value="${headerCopyrightPattern}" />
 	</module>
 	<module name="com.puppycrawl.tools.checkstyle.checks.NewlineAtEndOfFileCheck" />
+	<module name="com.puppycrawl.tools.checkstyle.checks.javadoc.JavadocPackageCheck" />
 
 	<!-- TreeWalker Checks -->
 	<module name="com.puppycrawl.tools.checkstyle.TreeWalker">

spring-javaformat/spring-javaformat-checkstyle/src/test/java/io/spring/javaformat/checkstyle/SpringChecksTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2021 the original author or authors.
+ * Copyright 2017-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,6 +21,7 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.nio.file.Files;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
@@ -112,8 +113,14 @@ private void printDebugInfo(File file) throws CheckstyleException {
 	}
 
 	public static Collection<Parameter> paramaters() throws IOException {
-		return Arrays.stream(SOURCES_DIR.list((dir, name) -> !name.startsWith("."))).sorted().map(Parameter::new)
-				.collect(Collectors.toList());
+		ArrayList<Parameter> parameters = Arrays.stream(SOURCES_DIR.listFiles(SpringChecksTests::sourceFile)).sorted()
+				.map(Parameter::new).collect(Collectors.toCollection(ArrayList::new));
+		parameters.add(new Parameter(new File(SOURCES_DIR, "nopackageinfo/NoPackageInfo.java")));
+		return parameters;
+	}
+
+	private static boolean sourceFile(File file) {
+		return file.isFile() && !file.getName().startsWith(".") && !file.getName().equals("package-info.java");
 	}
 
 	private static class Parameter {
@@ -126,7 +133,8 @@ private static class Parameter {
 
 		private final File configFile;
 
-		Parameter(String sourceName) {
+		Parameter(File sourceFile) {
+			String sourceName = sourceFile.getAbsolutePath().substring(SOURCES_DIR.getAbsolutePath().length() + 1);
 			this.name = sourceName.replace(".java", "");
 			this.sourceFile = new File(SOURCES_DIR, sourceName);
 			File configFile = new File(CONFIGS_DIR, this.name + ".xml");

spring-javaformat/spring-javaformat-checkstyle/src/test/java/io/spring/javaformat/checkstyle/SpringConfigurationLoaderTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2021 the original author or authors.
+ * Copyright 2017-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -45,8 +45,8 @@ public class SpringConfigurationLoaderTests {
 	@Test
 	public void loadShouldLoadChecks() {
 		Collection<FileSetCheck> checks = load(null);
-		assertThat(checks).hasSize(3);
-		TreeWalker treeWalker = (TreeWalker) checks.toArray()[2];
+		assertThat(checks).hasSize(4);
+		TreeWalker treeWalker = (TreeWalker) checks.toArray()[3];
 		Set<?> ordinaryChecks = (Set<?>) Extractors.byName("ordinaryChecks").extract(treeWalker);
 		assertThat(ordinaryChecks).hasSize(60);
 	}
@@ -56,8 +56,8 @@ public void loadWithExcludeShouldExcludeChecks() {
 		Set<String> excludes = Collections
 				.singleton("com.puppycrawl.tools.checkstyle.checks.whitespace.MethodParamPadCheck");
 		Collection<FileSetCheck> checks = load(excludes);
-		assertThat(checks).hasSize(3);
-		TreeWalker treeWalker = (TreeWalker) checks.toArray()[2];
+		assertThat(checks).hasSize(4);
+		TreeWalker treeWalker = (TreeWalker) checks.toArray()[3];
 		Set<?> ordinaryChecks = (Set<?>) Extractors.byName("ordinaryChecks").extract(treeWalker);
 		assertThat(ordinaryChecks).hasSize(59);
 	}
@@ -66,7 +66,7 @@ public void loadWithExcludeShouldExcludeChecks() {
 	public void loadWithExcludeHeaderShouldExcludeChecks() {
 		Set<String> excludes = Collections.singleton("io.spring.javaformat.checkstyle.check.SpringHeaderCheck");
 		Object[] checks = load(excludes).stream().toArray();
-		assertThat(checks).hasSize(2);
+		assertThat(checks).hasSize(3);
 	}
 
 	private Collection<FileSetCheck> load(Set<String> excludes) {

spring-javaformat/spring-javaformat-checkstyle/src/test/resources/check/nopackageinfo/NoPackageInfo.txt

@@ -0,0 +1 @@
++Missing package-info.java file

spring-javaformat/spring-javaformat-checkstyle/src/test/resources/source/nopackageinfo/NoPackageInfo.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2017-2022 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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 nopackageinfo;
+
+/**
+ * A class in a package with no {@code package-info.java} file.
+ *
+ * @author Andy Wilkinson
+ */
+class NoPackageInfo {
+
+}