#167 Allow EMF Tests to run in p2 build

Due to the update of the mockito versions, we are now able to run the emf tests again also in the p2 build

If emf.tests are running via p2 the test resources are saved differently, hence let's execute tests on resources in a .temp directory to avoid having git changes on each p2 build.

Resolves #167

tests/org.eclipse.emfcloud.modelserver.emf.tests/.gitignore

@@ -0,0 +1 @@
+/.temp/

tests/org.eclipse.emfcloud.modelserver.emf.tests/src/org/eclipse/emfcloud/modelserver/emf/AbstractResourceTest.java

@@ -1,5 +1,5 @@
 /********************************************************************************
- * Copyright (c) 2019 EclipseSource and others.
+ * Copyright (c) 2019-2023 EclipseSource and others.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0 which is available at
@@ -10,7 +10,12 @@
  ********************************************************************************/
 package org.eclipse.emfcloud.modelserver.emf;
 
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
 import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
 import java.util.Collections;
 
 import org.eclipse.emf.common.util.URI;
@@ -21,12 +26,23 @@
 import org.eclipse.emfcloud.modelserver.common.codecs.EMFJsonConverter;
 import org.junit.After;
 import org.junit.Before;
+import org.junit.BeforeClass;
 
 public abstract class AbstractResourceTest {
-   public static final String RESOURCE_PATH = "resources/";
+   public static final String TEST_RESOURCES_PATH = "resources/";
+   public static final String RESOURCE_PATH = ".temp/";
    @SuppressWarnings({ "checkstyle:VisibilityModifier" })
    protected ResourceSetImpl resourceSet; // needed in ResourceManagerTest.java
 
+   @BeforeClass
+   public static void setupTestResources() throws IOException {
+      // copy test resources to a temporary resource location to avoid
+      // git changes if executing tests due to saving resources
+      File sourceDirectory = new File(TEST_RESOURCES_PATH);
+      File destinationDirectory = new File(RESOURCE_PATH);
+      copyDirectoryFiles(sourceDirectory, destinationDirectory);
+   }
+
    @Before
    public void initializeResourceSet() {
       resourceSet = new ResourceSetImpl();
@@ -35,6 +51,33 @@ public void initializeResourceSet() {
       resourceSet.getResourceFactoryRegistry().getExtensionToFactoryMap().put("*", new XMIResourceFactoryImpl());
    }
 
+   private static void copyDirectoryFiles(final File sourceDirectory, final File destinationDirectory)
+      throws IOException {
+      if (!destinationDirectory.exists()) {
+         destinationDirectory.mkdir();
+      }
+      for (String f : sourceDirectory.list()) {
+         File source = new File(sourceDirectory, f);
+         File destination = new File(sourceDirectory, f);
+         // our src directory only contains files
+         if (source.isFile()) {
+            copyFile(source, destination);
+         }
+      }
+   }
+
+   private static void copyFile(final File sourceFile, final File destinationFile)
+      throws IOException {
+      try (InputStream in = new FileInputStream(sourceFile);
+         OutputStream out = new FileOutputStream(destinationFile)) {
+         byte[] buf = new byte[1024];
+         int length;
+         while ((length = in.read(buf)) > 0) {
+            out.write(buf, 0, length);
+         }
+      }
+   }
+
    protected Resource loadResource(final String file) throws IOException {
       Resource resource = resourceSet.createResource(URI.createFileURI(toFullPath(file)));
       resource.load(Collections.EMPTY_MAP);

tests/pom.xml

@@ -15,18 +15,14 @@
       <module>org.eclipse.emfcloud.modelserver.client.tests</module>
       <module>org.eclipse.emfcloud.modelserver.common.tests</module>
       <module>org.eclipse.emfcloud.modelserver.edit.tests</module>
+      <module>org.eclipse.emfcloud.modelserver.emf.tests</module>
       <module>org.eclipse.emfcloud.modelserver.tests</module>
    </modules>
 
    <profiles>
       <profile>
          <id>m2</id>
 
-         <!-- mockito cannot properly mock some classes so tests fail in p2 -->
-         <modules>
-            <module>org.eclipse.emfcloud.modelserver.emf.tests</module>
-         </modules>
-
          <build>
             <plugins>
                <plugin>