JavaCodeInsightTestUtil.java

/*
 * 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.
 */
package com.intellij.testFramework.fixtures;

import com.intellij.codeInsight.TargetElementUtil;
import com.intellij.openapi.editor.Editor;
import com.intellij.psi.*;
import com.intellij.refactoring.inline.InlineConstantFieldProcessor;
import com.intellij.refactoring.inline.InlineLocalHandler;
import com.intellij.refactoring.inline.InlineMethodProcessor;
import com.intellij.refactoring.inline.InlineParameterHandler;
import com.intellij.refactoring.util.InlineUtil;
import org.jetbrains.annotations.NotNull;

import static com.intellij.testFramework.LightPlatformTestCase.getProject;


public class JavaCodeInsightTestUtil {
  private static final int TARGET_FOR_INLINE_FLAGS =
    TargetElementUtil.ELEMENT_NAME_ACCEPTED | TargetElementUtil.REFERENCED_ELEMENT_ACCEPTED;

  private JavaCodeInsightTestUtil() { }

  public static void doInlineLocalTest(@NotNull final CodeInsightTestFixture fixture,
                                       @NotNull final String before, @NotNull final String after) {
    fixture.configureByFile(before);
    final Editor editor = fixture.getEditor();
    final PsiElement element = TargetElementUtil.findTargetElement(editor, TARGET_FOR_INLINE_FLAGS);
    assert element instanceof PsiLocalVariable : element;
    InlineLocalHandler.invoke(fixture.getProject(), editor, (PsiLocalVariable)element, null);
    fixture.checkResultByFile(after, false);
  }

  public static void doInlineParameterTest(@NotNull final CodeInsightTestFixture fixture,
                                           @NotNull final String before, @NotNull final String after) {
    fixture.configureByFile(before);
    final Editor editor = fixture.getEditor();
    final PsiElement element = TargetElementUtil.findTargetElement(editor, TARGET_FOR_INLINE_FLAGS);
    assert element instanceof PsiParameter : element;
    new InlineParameterHandler().inlineElement(getProject(), editor, element);
    fixture.checkResultByFile(after, false);
  }

  public static void doInlineMethodTest(@NotNull final CodeInsightTestFixture fixture,
                                        @NotNull final String before, @NotNull final String after) {
    fixture.configureByFile(before);
    final Editor editor = fixture.getEditor();
    final PsiElement element = TargetElementUtil.findTargetElement(editor, TARGET_FOR_INLINE_FLAGS);
    assert element instanceof PsiMethod : element;

    final PsiReference ref = fixture.getFile().findReferenceAt(editor.getCaretModel().getOffset());
    final PsiReferenceExpression refExpr = ref instanceof PsiReferenceExpression ? (PsiReferenceExpression)ref : null;

    final PsiMethod method = (PsiMethod)element;
    assert !(InlineMethodProcessor.checkBadReturns(method) && !InlineUtil.allUsagesAreTailCalls(method)) : "Bad returns found";
    new InlineMethodProcessor(getProject(), method, refExpr, editor, false).run();
    fixture.checkResultByFile(after, false);
  }

  public static void doInlineConstantTest(@NotNull final CodeInsightTestFixture fixture,
                                          @NotNull final String before, @NotNull final String after) {
    fixture.configureByFile(before);
    final Editor editor = fixture.getEditor();
    final PsiElement element = TargetElementUtil.findTargetElement(editor, TARGET_FOR_INLINE_FLAGS);
    assert element instanceof PsiField : element;

    final PsiReference ref = fixture.getFile().findReferenceAt(editor.getCaretModel().getOffset());
    final PsiReferenceExpression refExpr = ref instanceof PsiReferenceExpression ? (PsiReferenceExpression)ref : null;

    new InlineConstantFieldProcessor((PsiField)element, getProject(), refExpr, false).run();
    fixture.checkResultByFile(after, false);
  }
}