1   package test.net.sourceforge.pmd.rules;
2   
3   import net.sourceforge.pmd.PMD;
4   import net.sourceforge.pmd.Rule;
5   import net.sourceforge.pmd.RuleSetNotFoundException;
6   import test.net.sourceforge.pmd.testframework.SimpleAggregatorTst;
7   import test.net.sourceforge.pmd.testframework.TestDescriptor;
8   
9   public class BadComparisonTest extends SimpleAggregatorTst {
10  
11      private Rule rule;
12  
13      public void setUp() throws RuleSetNotFoundException {
14          rule = findRule("design", "BadComparison");
15      }
16  
17      public void testAll() {
18         runTests(new TestDescriptor[] {
19             new TestDescriptor(TEST1, "comparison to Double.NaN", 1, rule),
20             new TestDescriptor(TEST2, "ok equality comparison", 0, rule),
21             new TestDescriptor(TEST3, "comparison to Float.NaN", 1, rule),
22         });
23      }
24  
25      private static final String TEST1 =
26      "public class Foo {" + PMD.EOL +
27      " boolean x = (y == Double.NaN);" + PMD.EOL +
28      "}";
29  
30      private static final String TEST2 =
31      "public class Foo {" + PMD.EOL +
32      " boolean x = (y == z);" + PMD.EOL +
33      "}";
34  
35      private static final String TEST3 =
36      "public class Foo {" + PMD.EOL +
37      " boolean x = (y == Float.NaN);" + PMD.EOL +
38      "}";
39  
40  }