1   package test.net.sourceforge.pmd.rules;
2   
3   import net.sourceforge.pmd.Rule;
4   import net.sourceforge.pmd.RuleSetNotFoundException;
5   import net.sourceforge.pmd.PMD;
6   import test.net.sourceforge.pmd.testframework.TestDescriptor;
7   import test.net.sourceforge.pmd.testframework.RuleTst;
8   import test.net.sourceforge.pmd.testframework.SimpleAggregatorTst;
9   
10  public class BadComparisonRuleTest extends SimpleAggregatorTst {
11  
12      private Rule rule;
13  
14      public void setUp() throws RuleSetNotFoundException {
15          rule = findRule("rulesets/design.xml", "BadComparisonRule");
16      }
17  
18      public void testAll() {
19         runTests(new TestDescriptor[] {
20             new TestDescriptor(TEST1, "comparison to Double.NaN", 1, rule),
21             new TestDescriptor(TEST2, "ok equality comparison", 0, rule),
22             new TestDescriptor(TEST3, "comparison to Float.NaN", 1, rule),
23         });
24      }
25  
26      private static final String TEST1 =
27      "public class Foo {" + PMD.EOL +
28      " boolean x = (y == Double.NaN);" + PMD.EOL +
29      "}";
30  
31      private static final String TEST2 =
32      "public class Foo {" + PMD.EOL +
33      " boolean x = (y == z);" + PMD.EOL +
34      "}";
35  
36      private static final String TEST3 =
37      "public class Foo {" + PMD.EOL +
38      " boolean x = (y == Float.NaN);" + PMD.EOL +
39      "}";
40  
41  }