Add initial shared indexes test (not working yet).

GitOrigin-RevId: aec2e87bb4921d4d876ac16027a98a9f186f81e1

java/java-tests/testSrc/com/intellij/util/indexing/SharedIndexesTest.kt

@@ -0,0 +1,54 @@
+// 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.internal.DumpIndexAction
+import com.intellij.openapi.application.ApplicationManager
+import com.intellij.openapi.application.PathManager
+import com.intellij.openapi.progress.EmptyProgressIndicator
+import com.intellij.openapi.util.io.FileUtil
+import com.intellij.psi.impl.cache.impl.id.IdIndex
+import com.intellij.psi.impl.cache.impl.id.IdIndexEntry
+import com.intellij.psi.search.GlobalSearchScope
+import com.intellij.psi.stubs.StubUpdatingIndex
+import com.intellij.testFramework.SkipSlowTestLocally
+import com.intellij.testFramework.fixtures.LightJavaCodeInsightFixtureTestCase
+import java.nio.file.Path
+
+@SkipSlowTestLocally
+class SharedIndexesTest : LightJavaCodeInsightFixtureTestCase() {
+
+  private val tempDirPath: Path by lazy { FileUtil.createTempDirectory("shared-indexes-test", "").toPath() }
+  private val indexZip: Path by lazy {  tempDirPath.resolve(tempDirPath.fileName.toString() + ".zip") }
+
+  fun _testSharedIndexesForProject() {
+    val javaPsiFile = myFixture.configureByText("A.java", "public class A { }")
+    val virtualFile = javaPsiFile.virtualFile
+
+    val indexZip = tempDirPath.resolve(tempDirPath.fileName.toString() + ".zip")
+
+    val chunks = arrayListOf<DumpIndexAction.IndexChunk>()
+    chunks += DumpIndexAction.IndexChunk(setOf(virtualFile), "source")
+
+    DumpIndexAction.exportIndices(project, chunks, tempDirPath, EmptyProgressIndicator())
+
+    val indexSwitcher = FileBasedIndexSwitcher(FileBasedIndex.getInstance() as FileBasedIndexImpl)
+    ApplicationManager.getApplication().runWriteAction {
+      indexSwitcher.turnOff()
+    }
+
+    FileUtil.delete(PathManager.getIndexRoot())
+    System.setProperty("prebuilt.hash.index.zip", indexZip.toAbsolutePath().toString())
+
+    ApplicationManager.getApplication().runWriteAction {
+      indexSwitcher.turnOn()
+    }
+
+    val fileBasedIndex = FileBasedIndex.getInstance()
+    val map = fileBasedIndex.getFileData(StubUpdatingIndex.INDEX_ID, virtualFile, project)
+    println(map)
+
+    val values = fileBasedIndex.getValues(IdIndex.NAME, IdIndexEntry("A", false), GlobalSearchScope.allScope(project))
+    println(values)
+  }
+
+}