allow access to testdata path for tests

Author: m0rkeulv

src/test/java/com/intellij/plugins/haxe/HaxeCodeInsightFixtureTestCase.java

@@ -27,6 +27,7 @@
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.roots.LanguageLevelProjectExtension;
 import com.intellij.openapi.util.RecursionManager;
+import com.intellij.openapi.vfs.newvfs.impl.VfsRootAccess;
 import com.intellij.plugins.haxe.ide.module.HaxeModuleType;
 import com.intellij.plugins.haxe.util.HaxeTestUtils;
 import com.intellij.pom.java.LanguageLevel;
@@ -88,13 +89,15 @@ protected void setUp() throws Exception {
       moduleFixtureBuilder.addSourceContentRoot(myHaxeToolkit);
     }
 
-    moduleFixtureBuilder.addContentRoot(getTestDataPath());
-
     tuneFixture(moduleFixtureBuilder);
 
-    myFixture.setTestDataPath(getTestDataPath());
+    String path = getTestDataPath();
+    myFixture.setTestDataPath(path);
     myFixture.setUp();
 
+    // required for tests that compare results to files in testdata
+    VfsRootAccess.allowRootAccess(getProject(), path);
+
     // disable RecursionPrevention assert as type inference will cause several RecursionPrevention events.
     RecursionManager.disableAssertOnRecursionPrevention(myFixture.getProjectDisposable());
     RecursionManager.disableMissedCacheAssertions(myFixture.getProjectDisposable());