java/java-tests/testSrc/com/intellij/codeInsight/template/postfix/completion/TemplatesCompletionTest.java

/*
 * Copyright 2000-2014 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.codeInsight.template.postfix.completion;

import com.intellij.JavaTestUtil;
import com.intellij.codeInsight.completion.CompletionAutoPopupTestCase;
import com.intellij.codeInsight.completion.CompletionType;
import com.intellij.codeInsight.lookup.LookupElement;
import com.intellij.codeInsight.lookup.impl.LookupImpl;
import com.intellij.codeInsight.template.impl.LiveTemplateCompletionContributor;
import com.intellij.codeInsight.template.postfix.settings.PostfixTemplatesSettings;
import com.intellij.codeInsight.template.postfix.templates.*;
import com.intellij.lang.java.JavaLanguage;
import com.intellij.util.containers.ContainerUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.Set;

public class TemplatesCompletionTest extends CompletionAutoPopupTestCase {
  private boolean shotTemplatesInTestsOldValue;

  @Override
  public void setUp() {
    super.setUp();
    shotTemplatesInTestsOldValue = LiveTemplateCompletionContributor.ourShowTemplatesInTests;
    LiveTemplateCompletionContributor.ourShowTemplatesInTests = false;
  }

  @Override
  public void tearDown() throws Exception {
    LiveTemplateCompletionContributor.ourShowTemplatesInTests = shotTemplatesInTestsOldValue;

    PostfixTemplatesSettings settings = PostfixTemplatesSettings.getInstance();
    assertNotNull(settings);
    settings.setLangDisabledTemplates(ContainerUtil.<String, Set<String>>newHashMap());
    settings.setPostfixTemplatesEnabled(true);
    settings.setTemplatesCompletionEnabled(true);
    super.tearDown();
  }

  public void testSimpleCompletionList() {
    LiveTemplateCompletionContributor.ourShowTemplatesInTests = true;

    doAutoPopupTest("ins", InstanceofExpressionPostfixTemplate.class);
  }

  public void testAutopopupWithEnabledLiveTemplatesInCompletion() {
    LiveTemplateCompletionContributor.ourShowTemplatesInTests = true;

    configureByFile();
    type("instanceof");
    LookupImpl lookup = getLookup();
    assertNotNull(lookup);
    assertEquals(1, lookup.getItems().size());
    LookupElement item = lookup.getCurrentItem();
    assertNotNull(item);
    assertInstanceOf(item, PostfixTemplateLookupElement.class);
    assertInstanceOf(((PostfixTemplateLookupElement)item).getPostfixTemplate(), InstanceofExpressionPostfixTemplate.class);
  }

  public void testDoNotShowTemplateInInappropriateContext() {
    doAutoPopupTest("instanceof", null);
  }

  // IDEA-119910 Middle matching doesn't work if pattern starts with a digit
  public void testRestartCompletionForExactMatchOnly() {
    doCompleteTest(".2", '\n');
  }

  public void testRestartCompletionForExactMatch() {
    configureByFile();
    type("not");
    LookupElement currentItem = getLookup().getCurrentItem();
    assertNotNull(currentItem);
    assertInstanceOf(currentItem, PostfixTemplateLookupElement.class);
    assertEquals(".not", currentItem.getLookupString());

    type("null");
    currentItem = getLookup().getCurrentItem();
    assertNotNull(currentItem);
    assertInstanceOf(currentItem, PostfixTemplateLookupElement.class);
    assertEquals(".notnull", currentItem.getLookupString());
  }

  public void testShowTemplateInAutoPopup() {
    doAutoPopupTest("instanceof", InstanceofExpressionPostfixTemplate.class);
  }

  public void testShowAutoPopupForAliases() {
    doAutoPopupTest("nn", NotNullCheckPostfixTemplate.class);
  }

  public void testShowAutoPopupForFloatLiterals() {
    doAutoPopupTest("fori", ForAscendingPostfixTemplate.class);
  }

  public void testDoNotShowTemplateIfPluginIsDisabled() {
    PostfixTemplatesSettings settings = PostfixTemplatesSettings.getInstance();
    assertNotNull(settings);
    settings.setPostfixTemplatesEnabled(false);
    doAutoPopupTest("instanceof", null);
  }

  public void testDoNotShowTemplateIfTemplateCompletionIsDisabled() {
    PostfixTemplatesSettings settings = PostfixTemplatesSettings.getInstance();
    assertNotNull(settings);
    settings.setTemplatesCompletionEnabled(false);
    doAutoPopupTest("instanceof", null);
  }

  public void testDoNotShowTemplateInMultiCaretMode() {
    doAutoPopupTest("instanceof", null);
  }

  public void testDoNotCompleteTemplateInMultiCaretMode() {
    LiveTemplateCompletionContributor.ourShowTemplatesInTests = true;
    configureByFile();
    assertEmpty(myFixture.complete(CompletionType.BASIC));
    checkResultByFile();
  }

  public void testShowTemplateOnDoubleLiteral() {
    doAutoPopupTest("switch", SwitchStatementPostfixTemplate.class);
  }

  public void testSelectTemplateByTab() {
    doCompleteTest("par", '\t');
  }

  public void testSelectTemplateByEnter() {
    doCompleteTest("par", '\n');
  }

  public void testQuickTypingWithTab() {
    doQuickTypingTest("par", '\t');
  }

  public void testQuickTypingWithEnter() {
    doQuickTypingTest("par", '\n');
  }

  public void testDoNotShowDisabledTemplate() {
    PostfixTemplatesSettings settings = PostfixTemplatesSettings.getInstance();
    assertNotNull(settings);
    settings.disableTemplate(new InstanceofExpressionPostfixTemplate(), JavaLanguage.INSTANCE.getID());
    doAutoPopupTest("instanceof", null);
  }

  public void testDoNotShowTemplateOnCompletion() {
    configureByFile();
    myFixture.completeBasic();
    LookupElement[] elements = myFixture.getLookupElements();
    assertNotNull(elements);
    assertNull(ContainerUtil.findInstance(elements, PostfixTemplateLookupElement.class));
  }

  public void testRecalculatePrefix() {
    configureByFile();
    type("par");
    int selectedIndex = 0;
    myFixture.assertPreferredCompletionItems(selectedIndex, ".par", "parents");

    type("\b");
    assertNotNull(getLookup());
    myFixture.assertPreferredCompletionItems(selectedIndex, "parents");

    type("r");
    myFixture.assertPreferredCompletionItems(selectedIndex, ".par", "parents");
  }

  public void testTabCompletionWithTemplatesInAutopopup() {
    LiveTemplateCompletionContributor.ourShowTemplatesInTests = true;

    configureByFile();
    type(".");
    myFixture.assertPreferredCompletionItems(0, "parents");

    type("\t");
    assertNull(getLookup());
    checkResultByFile();
  }

  public void testShouldNotExpandInMultiCaretMode() {
    configureByFile();
    type(".if\t");
    checkResultByFile();
  }

  @Override
  protected String getBasePath() {
    return JavaTestUtil.getRelativeJavaTestDataPath() + "/codeInsight/template/postfix/completion";
  }

  private void doQuickTypingTest(String textToType, char c) {
    configureByFile();
    myFixture.type(textToType + c);
    checkResultByFile();
  }

  private void doCompleteTest(String textToType, char c) {
    configureByFile();
    type(textToType);
    assertNotNull(getLookup());
    myFixture.type(c);
    checkResultByFile();
  }

  private void doAutoPopupTest(@NotNull String textToType, @Nullable Class<? extends PostfixTemplate> expectedClass) {
    configureByFile();
    type(textToType);
    LookupImpl lookup = getLookup();
    if (expectedClass != null) {
      assertNotNull(lookup);
      LookupElement item = lookup.getCurrentItem();
      assertNotNull(item);
      assertInstanceOf(item, PostfixTemplateLookupElement.class);
      assertInstanceOf(((PostfixTemplateLookupElement)item).getPostfixTemplate(), expectedClass);
    }
    else {
      assertNull(lookup);
    }
  }

  private void configureByFile() {
    edt(new Runnable() {
      @Override
      public void run() {
        myFixture.configureByFile(getTestName(true) + ".java");
      }
    });
  }

  private void checkResultByFile() {
    myFixture.checkResultByFile(getTestName(true) + "_after.java");
  }
}