added tests for AvoidNestedBlocks check

src/testinputs/com/puppycrawl/tools/checkstyle/InputNestedBlocks.java

@@ -0,0 +1,44 @@
+////////////////////////////////////////////////////////////////////////////////
+// Test case file for checkstyle.
+// Created: 2001
+////////////////////////////////////////////////////////////////////////////////
+package com.puppycrawl.tools.checkstyle;
+
+/**
+ * Test case for finding nested blocks.
+ * @author lkuehne
+ **/
+class InputNestedBlocks
+{
+    static
+    { // OK
+    }
+
+    public void method()
+    {
+        int x = 0;
+
+        // if (condition that is not important anymore)
+        { // nested block, should be marked
+            int x = 1;
+            int y = x;
+        }
+
+        if (x == 1)
+        { // OK
+            x = 2;
+        }
+
+        switch (x)
+        {
+            case 0:
+                x = 3; // OK
+                break;
+            default:
+                {   // should be marked, even if a switch
+                    // case does not have its own scope
+                    x = 2;
+                }
+        }
+    }
+}

src/tests/com/puppycrawl/tools/checkstyle/AllTests.java

@@ -63,6 +63,7 @@ import com.puppycrawl.tools.checkstyle.checks.WhitespaceAroundTest;
 import com.puppycrawl.tools.checkstyle.checks.ArrayTypeStyleCheckTest;
 import com.puppycrawl.tools.checkstyle.checks.FinalParametersCheckTest;
 import com.puppycrawl.tools.checkstyle.checks.HideUtilityClassConstructorCheckTest;
+import com.puppycrawl.tools.checkstyle.checks.AvoidNestedBlocksCheckTest;
 import junit.framework.Test;
 import junit.framework.TestSuite;
 
@@ -85,6 +86,7 @@ public class AllTests {
         suite.addTest(new TestSuite(AbstractViolationReporterTest.class));
         suite.addTest(new TestSuite(ArrayTypeStyleCheckTest.class));
         suite.addTest(new TestSuite(AvoidInlineConditionalsCheckTest.class));
+        suite.addTest(new TestSuite(AvoidNestedBlocksCheckTest.class));
         suite.addTest(new TestSuite(AvoidStarImportTest.class));
         suite.addTest(new TestSuite(ConfigurationLoaderTest.class));
         suite.addTest(new TestSuite(ConstantNameCheckTest.class));

src/tests/com/puppycrawl/tools/checkstyle/checks/AvoidNestedBlocksCheckTest.java

@@ -0,0 +1,20 @@
+package com.puppycrawl.tools.checkstyle.checks;
+
+import com.puppycrawl.tools.checkstyle.BaseCheckTestCase;
+import com.puppycrawl.tools.checkstyle.DefaultConfiguration;
+
+public class AvoidNestedBlocksCheckTest
+        extends BaseCheckTestCase
+{
+    public void testIt()
+        throws Exception
+    {
+        final DefaultConfiguration checkConfig =
+            createCheckConfig(AvoidNestedBlocksCheck.class);
+        final String[] expected = {
+            "22:9: Avoid nested blocks.",
+            "38:17: Avoid nested blocks.",
+        };
+        verify(checkConfig, getPath("InputNestedBlocks.java"), expected);
+    }
+}