HBX-3110: Add a functional test to guard the sanity of the Ant examples

ant/pom.xml

@@ -58,6 +58,12 @@
             <artifactId>h2</artifactId>
             <scope>test</scope>
         </dependency>
+		<dependency>
+			<groupId>org.apache.ivy</groupId>
+			<artifactId>ivy</artifactId>
+			<version>2.5.2</version>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 
     <build>
@@ -115,6 +121,9 @@
 							<resources>
 								<resource>
 									<directory>docs/examples</directory>
+									<excludes>
+										<exclude>**/README.md</exclude>
+									</excludes>
 								</resource>
 							</resources>
 						</configuration>

ant/src/it/java/org/hibernate/tool/ant/ExamplesTestIT.java

@@ -1,17 +1,111 @@
 package org.hibernate.tool.ant;
 
-import static org.junit.jupiter.api.Assertions.assertTrue;
-
+import org.apache.tools.ant.DefaultLogger;
+import org.apache.tools.ant.MagicNames;
+import org.apache.tools.ant.Project;
+import org.apache.tools.ant.ProjectHelper;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
 
+import java.io.File;
+import java.net.URISyntaxException;
 import java.net.URL;
+import java.nio.file.Files;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.Statement;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertFalse;
 
 public class ExamplesTestIT {
 
+    private static File baseFolder;
+
+    @BeforeAll
+    public static void beforeAll() throws Exception {
+        baseFolder = determineBaseFolder();
+        editIncludedXml();
+        overwriteHibernateProperties();
+        createDatabase();
+    }
+
     @Test
-    public void testSomethin() {
-        URL url = getClass().getClassLoader().getResource("5-minute-tutorial/build.xml");
-        System.out.println(url);
+    public void test5MinuteTutorial() throws Exception {
+        File buildFile = new File(baseFolder, "5-minute-tutorial/build.xml");
+        Project project = createProject(buildFile);
+        assertNotNull(project);
+        File personFile = new File(baseFolder, "5-minute-tutorial/generated/Person.java");
+        assertFalse(personFile.exists());
+        project.executeTarget("reveng");
+        assertTrue(personFile.exists());
+    }
+
+    private Project createProject(File buildXmlFile) throws Exception {
+        Project result = new Project();
+        ProjectHelper projectHelper = ProjectHelper.getProjectHelper();
+        result.addReference(MagicNames.REFID_PROJECT_HELPER, projectHelper);
+        result.setBaseDir(buildXmlFile.getParentFile());
+        result.addBuildListener(createConsoleLogger());
+        projectHelper.parse(result, buildXmlFile);
+        return result;
+    }
+
+    private DefaultLogger createConsoleLogger() {
+        DefaultLogger consoleLogger = new DefaultLogger();
+        consoleLogger.setErrorPrintStream(System.err);
+        consoleLogger.setOutputPrintStream(System.out);
+        consoleLogger.setMessageOutputLevel(Project.MSG_INFO);
+        return consoleLogger;
+    }
+
+    private static void editIncludedXml() throws Exception {
+        File xmlFile = new File(baseFolder, "common/included.xml");
+        StringBuffer xmlFileContents = new StringBuffer(
+                new String(Files.readAllBytes(xmlFile.toPath())));
+        int start = xmlFileContents.indexOf("<ivy:cachepath");
+        int end = xmlFileContents.indexOf("<ivy:cachepath", start + 1);
+        xmlFileContents.replace(start, end, "");
+        start = xmlFileContents.indexOf("<path refid=\"hibernate-tools.path\"/>");
+        end = xmlFileContents.indexOf("<path refid=", start + 1);
+        xmlFileContents.replace(start, end, "");
+        Files.writeString(xmlFile.toPath(), xmlFileContents.toString());
+    }
+
+    private static void overwriteHibernateProperties() throws Exception {
+        File hibernatePropertiesFile = new File(baseFolder, "common/hibernate.properties");
+        String hibernatePropertiesFileContents =
+                "hibernate.connection.driver_class=org.h2.Driver\n" +
+                        "hibernate.connection.url=" + constructJdbcConnectionString() + "\n" +
+                        "hibernate.connection.username=\n" +
+                        "hibernate.connection.password=\n" +
+                        "hibernate.default_catalog=TEST\n" +
+                        "hibernate.default_schema=PUBLIC\n";
+        Files.writeString(hibernatePropertiesFile.toPath(), hibernatePropertiesFileContents);
+    }
+
+    private static void createDatabase() throws Exception {
+        File databaseFile = new File(baseFolder, "database/test.mv.db");
+        assertFalse(databaseFile.exists());
+        assertFalse(databaseFile.isFile());
+        Connection connection = DriverManager.getConnection(constructJdbcConnectionString());
+        Statement statement = connection.createStatement();
+        statement.execute("create table PERSON (ID int not null, NAME varchar(20), primary key (ID))");
+        statement.close();
+        connection.close();
+        assertTrue(databaseFile.exists());
+        assertTrue(databaseFile.isFile());
+    }
+
+    private static String constructJdbcConnectionString() {
+        return "jdbc:h2:" + baseFolder.getAbsolutePath() + "/database/test;AUTO_SERVER=TRUE";
+    }
+
+    private static File determineBaseFolder() throws Exception {
+        return new File(ExamplesTestIT.class.getClassLoader().getResource("common/included.xml").toURI())
+                .getParentFile().getParentFile();
     }
 
 }