1 files changed, 135 insertions, 0 deletions
diff --git a/platform/platform-tests/testSrc/com/intellij/psi/autodetect/IndentAutoDetectionTest.java b/platform/platform-tests/testSrc/com/intellij/psi/autodetect/IndentAutoDetectionTest.java
new file mode 100644
index 000000000000..4b59416de0d9
--- /dev/null
+++ b/platform/platform-tests/testSrc/com/intellij/psi/autodetect/IndentAutoDetectionTest.java
@@ -0,0 +1,135 @@
+/*
+ * 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.psi.autodetect;
+
+import com.intellij.openapi.editor.Document;
+import com.intellij.psi.codeStyle.autodetect.*;
+import com.intellij.testFramework.LightPlatformCodeInsightTestCase;
+import com.intellij.testFramework.PlatformTestCase;
+import com.intellij.testFramework.PlatformTestUtil;
+import org.jetbrains.annotations.NotNull;
+import org.junit.Assert;
+
+import java.io.File;
+import java.util.List;
+
+public class IndentAutoDetectionTest extends LightPlatformCodeInsightTestCase {
+  private static final String BASE_PATH = "codeStyle/autodetect/";
+
+  static {
+    PlatformTestCase.initPlatformLangPrefix();
+  }
+
+  public void testSimpleIndent() {
+    doTestMaxUsedIndent(2, 6);
+  }
+
+  public void testManyComments() {
+    doTestMaxUsedIndent(2, 6);
+  }
+
+  public void testManyZeroRelativeIndent() {
+    doTestMaxUsedIndent(2);
+  }
+
+  public void testSpacesToNumbers() throws Exception {
+    String text = "     i\n" +
+                  "    a\n" +
+                  "          t\n";
+    doTestLineToIndentMapping(text, 5, 4, 10);
+  }
+
+  public void testEmptyLines() throws Exception {
+    doTestLineToIndentMapping("     \n\n\n", -1, -1, -1);
+  }
+
+  public void testSpacesInSimpleClass() {
+    doTestLineToIndentMapping(
+      "public class A {\n" +
+      "\n" +
+      "    public void test() {\n" +
+      "      int a = 2;\n" +
+      "    }\n" +
+      "\n" +
+      "    public void a() {\n" +
+      "    }\n" +
+      "}",
+      0, -1, 4, 6, 4, -1, 4, 4, 0
+    );
+  }
+
+  public void testComplexIndents() {
+    doTestLineToIndentMapping(
+      "class Test\n" +
+      "{\n" +
+      "  int a;\n" +
+      "  int b;\n" +
+      "  \n" +
+      "  public void test() {\n" +
+      "    int c;\n" +
+      "  }\n" +
+      "  \n" +
+      "  public void run() {\n" +
+      "    Runnable runnable = new Runnable() {\n" +
+      "      @Override\n" +
+      "      public void run() {\n" +
+      "        System.out.println(\"Hello!\");\n" +
+      "      }\n" +
+      "    };\n" +
+      "  }\n" +
+      "}",
+      0, 0, 2, 2, -1, 2, 4, 2, -1, 2, 4, 6, 6, 8, 6, 4, 2, 0
+    );
+  }
+
+  public void doTestMaxUsedIndent(int indentExpected, int timesUsedExpected) {
+    IndentUsageInfo maxIndentExpected = new IndentUsageInfo(indentExpected, timesUsedExpected);
+    IndentUsageInfo indentInfo = getMaxUsedIndentInfo();
+    Assert.assertEquals("Indent size mismatch", maxIndentExpected.getIndentSize(), indentInfo.getIndentSize());
+    Assert.assertEquals("Indent size usage number mismatch", maxIndentExpected.getTimesUsed(), indentInfo.getTimesUsed());
+  }
+
+  public void doTestMaxUsedIndent(int indentExpected) {
+    IndentUsageInfo indentInfo = getMaxUsedIndentInfo();
+    Assert.assertEquals("Indent size mismatch", indentExpected, indentInfo.getIndentSize());
+  }
+
+  @NotNull
+  private IndentUsageInfo getMaxUsedIndentInfo() {
+    configureByFile(getTestName(true) + ".java");
+    Document document = getDocument(myFile);
+    List<LineIndentInfo> lines = new LineIndentInfoBuilder(document.getCharsSequence()).build();
+    IndentUsageStatistics statistics = new IndentUsageStatisticsImpl(lines);
+    return statistics.getKMostUsedIndentInfo(0);
+  }
+
+  private static void doTestLineToIndentMapping(@NotNull CharSequence text, int... spacesForLine) {
+    List<LineIndentInfo> list = new LineIndentInfoBuilder(text).build();
+    Assert.assertEquals(list.size(), spacesForLine.length);
+    for (int i = 0; i < spacesForLine.length; i++) {
+      int indentSize = list.get(i).getIndentSize();
+      Assert.assertEquals("Mismatch on line " + i, spacesForLine[i], indentSize);
+    }
+  }
+
+  @Override
+  @NotNull
+  public String getTestDataPath() {
+    return PlatformTestUtil.getCommunityPath().replace(File.separatorChar, '/')
+           + "/platform/platform-tests/testData/"
+           + BASE_PATH;
+  }
+}