Cleanup (moves test-only method to tests)

java/java-psi-api/src/com/intellij/pom/java/LanguageLevel.java

@@ -10,7 +10,6 @@ import com.intellij.util.lang.JavaVersion;
 import org.jetbrains.annotations.Nls;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
-import org.jetbrains.annotations.TestOnly;
 
 /**
  * Represents a language level (i.e. features available) of a Java code.
@@ -47,12 +46,6 @@ public enum LanguageLevel {
     return this == JDK_X ? "Java X" :  "Java " + JavaSdkVersion.fromLanguageLevel(this).getDescription();
   }
 
-  @TestOnly
-  public static LanguageLevel getHighestRegistered() {
-    LanguageLevel[] values = values();
-    return values[values.length - 1];
-  }
-  
   @NotNull
   @Nls
   public String getPresentableText() {

java/java-tests/testSrc/com/intellij/java/parser/JavaParsingTestCase.java

@@ -1,6 +1,7 @@
 // Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.java.parser;
 
+import com.intellij.JavaTestUtil;
 import com.intellij.ide.highlighter.JavaFileType;
 import com.intellij.lang.ASTNode;
 import com.intellij.lang.LanguageASTFactory;
@@ -37,7 +38,7 @@ public abstract class JavaParsingTestCase extends ParsingTestCase {
   @Override
   protected void setUp() throws Exception {
     super.setUp();
-    myLanguageLevel = LanguageLevel.getHighestRegistered();
+    myLanguageLevel = JavaTestUtil.getMaxRegisteredLanguageLevel();
     getProject().registerService(LanguageLevelProjectExtension.class, new LanguageLevelProjectExtensionImpl(getProject()));
     addExplicitExtension(LanguageASTFactory.INSTANCE, JavaLanguage.INSTANCE, new JavaASTFactory());
   }

java/java-tests/testSrc/com/intellij/java/psi/formatter/java/JavaFormatterSpaceTest.java

@@ -1,8 +1,8 @@
-// Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.java.psi.formatter.java;
 
+import com.intellij.JavaTestUtil;
 import com.intellij.openapi.roots.LanguageLevelProjectExtension;
-import com.intellij.pom.java.LanguageLevel;
 import com.intellij.psi.codeStyle.CommonCodeStyleSettings;
 import com.intellij.testFramework.LightPlatformTestCase;
 
@@ -16,7 +16,7 @@ public class JavaFormatterSpaceTest extends AbstractJavaFormatterTest {
   @Override
   protected void setUp() throws Exception {
     super.setUp();
-    LanguageLevelProjectExtension.getInstance(LightPlatformTestCase.getProject()).setLanguageLevel(LanguageLevel.getHighestRegistered());
+    LanguageLevelProjectExtension.getInstance(LightPlatformTestCase.getProject()).setLanguageLevel(JavaTestUtil.getMaxRegisteredLanguageLevel());
   }
 
   public void testSpacingBetweenTypeParameters() {

java/testFramework/src/com/intellij/JavaTestUtil.java

@@ -1,18 +1,4 @@
-/*
- * Copyright 2000-2015 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij;
 
 import com.intellij.openapi.Disposable;
@@ -24,6 +10,7 @@ import com.intellij.openapi.projectRoots.Sdk;
 import com.intellij.openapi.projectRoots.impl.JavaAwareProjectJdkTableImpl;
 import com.intellij.openapi.projectRoots.impl.ProjectJdkImpl;
 import com.intellij.openapi.util.text.StringUtil;
+import com.intellij.pom.java.LanguageLevel;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.TestOnly;
 
@@ -67,4 +54,9 @@ public class JavaTestUtil {
       throw new RuntimeException(e);
     }
   }
+
+  public static LanguageLevel getMaxRegisteredLanguageLevel() {
+    LanguageLevel[] values = LanguageLevel.values();
+    return values[values.length - 1];
+  }
 }