// Copyright 2000-2020 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.util.indexing;

import com.intellij.find.ngrams.TrigramIndex;
import com.intellij.openapi.Disposable;
import com.intellij.openapi.fileTypes.FileType;
import com.intellij.openapi.fileTypes.FileTypeManager;
import com.intellij.openapi.util.Disposer;
import com.intellij.openapi.util.io.FileUtilRt;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.openapi.vfs.VirtualFileWithId;
import com.intellij.psi.stubs.StubUpdatingIndex;
import com.intellij.testFramework.fixtures.LightJavaCodeInsightFixtureTestCase;

/**
 * @author Dmitry Avdeev
 */
public class FileBasedIndexTest extends LightJavaCodeInsightFixtureTestCase {

  public void testSurviveOnFileTypeChange() {
    myFixture.configureByText("Foo.java", "class Foo { String bar; }");
    myFixture.testHighlighting();
    Disposable disposable = Disposer.newDisposable();
    FileType foo = FileTypeIndexTest.registerFakeFileType(getTestName(false), "test", disposable);
    String fooName = foo.getName();
    Disposer.dispose(disposable);
    assertNull(FileTypeManager.getInstance().findFileTypeByName(fooName));
    myFixture.configureByText("Bar.java", "class Bar { String bar; }");
    myFixture.testHighlighting();
  }

  public void testLargeFile() {
    String largeFileText = "class Foo { String bar; }" + StringUtil.repeat(" ", FileUtilRt.LARGE_FOR_CONTENT_LOADING + 42);
    VirtualFile file = myFixture.addFileToProject("Foo.java", largeFileText).getVirtualFile();
    int fileId = ((VirtualFileWithId)file).getId();

    assertFalse(IndexingStamp.getNontrivialFileIndexedStates(fileId).contains(StubUpdatingIndex.INDEX_ID));
    assertFalse(IndexingStamp.getNontrivialFileIndexedStates(fileId).contains(TrigramIndex.INDEX_ID));

    assertEmpty(FileBasedIndex.getInstance().getFileData(TrigramIndex.INDEX_ID, file, getProject()).keySet());

    assertFalse(IndexingStamp.getNontrivialFileIndexedStates(fileId).contains(StubUpdatingIndex.INDEX_ID));
    assertFalse(IndexingStamp.getNontrivialFileIndexedStates(fileId).contains(TrigramIndex.INDEX_ID));
  }
}
