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 EqualsNullRuleTest extends SimpleAggregatorTst {
10  
11      private Rule rule;
12  
13      public void setUp() throws RuleSetNotFoundException {
14          rule = findRule("design", "EqualsNull");
15      }
16  
17      public void testAll() {
18         runTests(new TestDescriptor[] {
19             new TestDescriptor(TEST1, "object.equals(null), bad", 1, rule),
20             new TestDescriptor(TEST2, "object == null, ok", 0, rule),
21             new TestDescriptor(TEST3, "object.method().equals(null), bad", 1, rule),
22         });
23      }
24  
25      private static final String TEST1 =
26      "public class Foo {" + PMD.EOL +
27      " void bar() {" + PMD.EOL +
28      "  if (foo.equals(null)) {}" + PMD.EOL +
29      " }" + PMD.EOL +
30      "}";
31  
32      private static final String TEST2 =
33      "public class Foo {" + PMD.EOL +
34      " void bar() {" + PMD.EOL +
35      "  if (foo == null) {}" + PMD.EOL +
36      " }" + PMD.EOL +
37      "}";
38  
39      private static final String TEST3 =
40      "public class Foo {" + PMD.EOL +
41      " void bar() {" + PMD.EOL +
42      "  if (foo.bar().equals(null)) {}" + PMD.EOL +
43      " }" + PMD.EOL +
44      "}";
45  
46  }