[STF] Adds direct access to open an editor

stf/META-INF/MANIFEST.MF

@@ -16,7 +16,8 @@ Require-Bundle: org.eclipse.ui,
  org.eclipse.jdt.launching;resolution:=optional,
  saros.core,
  saros.eclipse,
- org.junit
+ org.junit,
+ org.eclipse.ui.ide
 Bundle-ClassPath: .,
  lib/org.eclipse.swtbot.ant.junit_2.7.0.201806111355.jar,
  lib/org.eclipse.swtbot.e4.finder_2.7.0.201806111355.jar,

stf/src/saros/stf/server/rmi/superbot/internal/IInternal.java

@@ -143,6 +143,13 @@ public void createJavaClass(String projectName, String packageName, String class
    */
   public void append(String projectName, String path, String content) throws RemoteException;
 
+  /**
+   * Opens a file in an editor. The editor used to display the file is determined by Eclipse.
+   *
+   * @param path full path to the file relative to the workspace root, e.g <i>Foo/bar/hello.txt</i>
+   * @throws RemoteException
+   */
+  public void openFile(String path) throws RemoteException;
   /**
    * Gets the content from the given file
    *

stf/src/saros/stf/server/rmi/superbot/internal/impl/InternalImpl.java

@@ -17,6 +17,7 @@
 import org.eclipse.core.resources.IFolder;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IProjectDescription;
+import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IPath;
@@ -27,6 +28,9 @@
 import org.eclipse.jdt.launching.IVMInstall;
 import org.eclipse.jdt.launching.JavaRuntime;
 import org.eclipse.jdt.launching.LibraryLocation;
+import org.eclipse.swtbot.swt.finder.finders.UIThreadRunnable;
+import org.eclipse.ui.PlatformUI;
+import org.eclipse.ui.ide.IDE;
 import saros.stf.server.StfRemoteObject;
 import saros.stf.server.rmi.superbot.internal.IInternal;
 import saros.versioning.Version;
@@ -406,4 +410,34 @@ public void changeFileEncoding(String projectName, String path, String charset)
       throw new RemoteException(e.getMessage(), e.getCause());
     }
   }
+
+  @Override
+  public void openFile(final String path) throws RemoteException {
+
+    final IResource resource = ResourcesPlugin.getWorkspace().getRoot().findMember(path);
+
+    if (resource == null) throw new RemoteException(path + " does not exist");
+
+    if ((resource.getType() & IResource.FILE) != IResource.FILE)
+      throw new RemoteException(path + " is not a file");
+
+    final Exception exception =
+        UIThreadRunnable.syncExec(
+            () -> {
+              try {
+                IDE.openEditor(
+                    PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage(),
+                    resource.getAdapter(IFile.class));
+                return null;
+              } catch (Exception e) {
+                return e;
+              }
+            });
+
+    // TODO check if PartInitException can be serialized
+    if (exception != null) {
+      log.error("failed to open file: " + path, exception);
+      throw new RemoteException("failed to open file " + path + " : " + exception.getMessage());
+    }
+  }
 }

stf/test/saros/stf/test/stf/internal/InternalTest.java

@@ -21,6 +21,7 @@ public static void selectTesters() throws Exception {
 
   @After
   public void deleteWorkspace() throws Exception {
+    ALICE.remoteBot().closeAllEditors();
     ALICE.superBot().internal().clearWorkspace();
   }
 
@@ -114,6 +115,14 @@ public void testGetFileSize() throws Exception {
     assertEquals(3L, ALICE.superBot().internal().getFileSize("Hello", "test.bar"));
   }
 
+  @Test
+  public void testOpenFile() throws Exception {
+    ALICE.superBot().internal().createProject("foo");
+    ALICE.superBot().internal().createFile("foo", "hello.txt", "Hello World");
+    ALICE.superBot().internal().openFile("foo/hello.txt");
+    assertEquals("Hello World", ALICE.remoteBot().editor("hello.txt").getText());
+  }
+
   @AfterClass
   public static void resetSarosVersion() throws RemoteException {
     ALICE.superBot().internal().resetSarosVersion();