refactor tests

compiler/tests/org/jetbrains/jet/JetTestUtils.java

@@ -1,5 +1,6 @@
 package org.jetbrains.jet;
 
+import com.intellij.openapi.Disposable;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.jet.lang.cfg.pseudocode.JetControlFlowDataTraceFactory;
 import org.jetbrains.jet.lang.diagnostics.Diagnostic;
@@ -13,6 +14,8 @@ import org.jetbrains.jet.util.slicedmap.ReadOnlySlice;
 import org.jetbrains.jet.util.slicedmap.SlicedMap;
 import org.jetbrains.jet.util.slicedmap.WritableSlice;
 
+import java.io.File;
+import java.io.IOException;
 import java.util.Collection;
 import java.util.Collections;
 
@@ -128,4 +131,40 @@ public class JetTestUtils {
     public static BindingContext analyzeNamespace(@NotNull JetNamespace namespace, @NotNull JetControlFlowDataTraceFactory flowDataTraceFactory) {
         return AnalyzerFacade.analyzeOneNamespaceWithJavaIntegration(namespace, flowDataTraceFactory);
     }
+
+
+    public static JetCoreEnvironment createEnvironmentWithMockJdk(Disposable disposable) {
+        JetCoreEnvironment environment = new JetCoreEnvironment(disposable);
+        final File rtJar = new File(JetTestCaseBuilder.getHomeDirectory(), "compiler/testData/mockJDK-1.7/jre/lib/rt.jar");
+        environment.addToClasspath(rtJar);
+        environment.addToClasspath(new File(JetTestCaseBuilder.getHomeDirectory(), "compiler/testData/mockJDK-1.7/jre/lib/annotations.jar"));
+        return environment;
+    }
+
+
+    public static void mkdirs(File file) throws IOException {
+        if (file.isDirectory()) {
+            return;
+        }
+        if (!file.mkdirs()) {
+            throw new IOException();
+        }
+    }
+
+    public static void rmrf(File file) {
+        if (file != null) {
+            File[] children = file.listFiles();
+            if (children != null) {
+                for (File child : children) {
+                    rmrf(child);
+                }
+            }
+            file.delete();
+        }
+    }
+
+    public static void recreateDirectory(File dir) throws IOException {
+        rmrf(dir);
+        mkdirs(dir);
+    }
 }