Debugger: compile TINY_APP in test once

.gitignore

@@ -12,3 +12,4 @@ pluginPublisher/plugin-verifier.jar
 tmp
 workspace.xml
 *.versionsBackup
+idea/testData/debugger/tinyApp/classes*

idea/tests/org/jetbrains/jet/plugin/debugger/KotlinDebuggerTestCase.java

@@ -47,8 +47,7 @@ import java.io.File;
 
 public abstract class KotlinDebuggerTestCase extends DebuggerTestCase {
     protected static final String TINY_APP = PluginTestCaseBase.getTestDataPathBase() + "/debugger/tinyApp";
-
-    private File outputDir;
+    private static boolean IS_TINY_APP_COMPILED = false;
 
     @Override
     protected OutputChecker initOutputChecker() {
@@ -87,19 +86,14 @@ public abstract class KotlinDebuggerTestCase extends DebuggerTestCase {
 
     }
 
-    @Override
-    public void tearDown() throws Exception {
-        super.tearDown();
-        if (outputDir != null && outputDir.exists()) {
-            FileUtil.delete(outputDir);
-        }
-    }
-
     @Override
     protected void ensureCompiledAppExists() throws Exception {
-        String modulePath = getTestAppPath();
-        outputDir = new File(modulePath + File.separator + "classes");
-        MockLibraryUtil.compileKotlin(modulePath + File.separator + "src", outputDir);
+        if (!IS_TINY_APP_COMPILED) {
+            String modulePath = getTestAppPath();
+            MockLibraryUtil.compileKotlin(modulePath + File.separator + "src", new File(modulePath + File.separator + "classes"));
+            //noinspection AssignmentToStaticFieldFromInstanceMethod
+            IS_TINY_APP_COMPILED = true;
+        }
     }
 
     private static class KotlinOutputChecker extends OutputChecker {