Added performance test for indent detector

java/java-tests/testSrc/com/intellij/psi/codeStyle/autodetect/JavaAutoDetectIndentPerformanceTest.java

@@ -0,0 +1,56 @@
+/*
+ * 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.psi.codeStyle.autodetect;
+
+import com.intellij.JavaTestUtil;
+import com.intellij.psi.autodetect.AbstractIndentAutoDetectionTest;
+import com.intellij.psi.codeStyle.CommonCodeStyleSettings;
+import com.intellij.testFramework.PlatformTestUtil;
+import org.jetbrains.annotations.NotNull;
+import org.junit.Assert;
+
+public class JavaAutoDetectIndentPerformanceTest extends AbstractIndentAutoDetectionTest {
+
+  @NotNull
+  @Override
+  protected String getTestDataPath() {
+    return JavaTestUtil.getJavaTestDataPath() + "/psi/autodetect/";
+  }
+
+  @NotNull
+  @Override
+  protected String getFileNameWithExtension() {
+    return getTestName(true) + ".java";
+  }
+
+  public void testBigFile() {
+    final CommonCodeStyleSettings.IndentOptions[] options = new CommonCodeStyleSettings.IndentOptions[1];
+
+    PlatformTestUtil
+      .startPerformanceTest("Detecting indent on newly opened file", 250, () -> options[0] = detectIndentOptions())
+      .setup(() -> configureByFile(getFileNameWithExtension()))
+      .cpuBound()
+      .assertTiming();
+
+    //to ensure if worked as expected
+    Assert.assertEquals("Detect indent mistmatch", 2, options[0].INDENT_SIZE);
+
+    PlatformTestUtil
+      .startPerformanceTest("Detecting indent on hot file", 30, AbstractIndentAutoDetectionTest::detectIndentOptions)
+      .cpuBound()
+      .assertTiming();
+  }
+}