1 /***
2 * BSD-style license; for more info see http://pmd.sourceforge.net/license.html
3 */
4 package test.net.sourceforge.pmd.rules.design;
5
6 import net.sourceforge.pmd.PMD;
7 import net.sourceforge.pmd.Report;
8 import net.sourceforge.pmd.ReportListener;
9 import net.sourceforge.pmd.Rule;
10 import net.sourceforge.pmd.RuleViolation;
11 import net.sourceforge.pmd.rules.design.UseSingletonRule;
12 import net.sourceforge.pmd.stat.Metric;
13 import test.net.sourceforge.pmd.testframework.RuleTst;
14 import test.net.sourceforge.pmd.testframework.TestDescriptor;
15 import test.net.sourceforge.pmd.testframework.SimpleAggregatorTst;
16
17 public class UseSingletonRuleTest extends SimpleAggregatorTst implements ReportListener {
18
19 private int callbacks;
20
21 public void testAll() {
22 runTests(new TestDescriptor[] {
23 new TestDescriptor(TEST1, "should be singleton since all static, public constructor", 1, new UseSingletonRule()),
24 new TestDescriptor(TEST2, "ok, uses non-static", 0, new UseSingletonRule()),
25 new TestDescriptor(TEST3, "should be singleton, couple of statics, no constructor", 1, new UseSingletonRule()),
26 new TestDescriptor(TEST4, "no constructor, one static - ok", 0, new UseSingletonRule()),
27 new TestDescriptor(TEST5, "classic singleton - ok", 0, new UseSingletonRule()),
28 new TestDescriptor(TEST6, "abstract, so ok", 0, new UseSingletonRule()),
29 new TestDescriptor(TEST7, "has no fields, so ok", 0, new UseSingletonRule()),
30 });
31 }
32
33 public void testResetState() throws Throwable {
34 callbacks = 0;
35 Rule rule = new UseSingletonRule();
36 Report report = new Report();
37 report.addListener(this);
38 runTestFromString(TEST3, rule, report);
39 runTestFromString(TEST4, rule, report);
40 assertEquals(1, callbacks);
41 }
42
43 public void ruleViolationAdded(RuleViolation ruleViolation) {
44 callbacks++;
45 }
46 public void metricAdded(Metric metric) {}
47
48 private static final String TEST1 =
49 "public class Foo {" + PMD.EOL +
50 " public Foo() { }" + PMD.EOL +
51 " public static void doSomething() {}" + PMD.EOL +
52 " public static void main(String args[]) {" + PMD.EOL +
53 " doSomething();" + PMD.EOL +
54 " }" + PMD.EOL +
55 "}";
56
57 private static final String TEST2 =
58 "public class Foo {" + PMD.EOL +
59 " public Foo() { }" + PMD.EOL +
60 " public void doSomething() { }" + PMD.EOL +
61 " public static void main(String args[]) { }" + PMD.EOL +
62 "}";
63
64 private static final String TEST3 =
65 "public class Foo {" + PMD.EOL +
66 " public static void doSomething1() { }" + PMD.EOL +
67 " public static void doSomething2() { }" + PMD.EOL +
68 "}";
69
70 private static final String TEST4 =
71 "public class Foo {" + PMD.EOL +
72 " public Foo() { }" + PMD.EOL +
73 "}";
74
75 private static final String TEST5 =
76 "public class Foo {" + PMD.EOL +
77 " private Foo() {}" + PMD.EOL +
78 " public static Foo get() {" + PMD.EOL +
79 " return null;" + PMD.EOL +
80 " } " + PMD.EOL +
81 "}";
82
83 private static final String TEST6 =
84 "public abstract class Foo {" + PMD.EOL +
85 " public static void doSomething1() { }" + PMD.EOL +
86 " public static void doSomething2() { }" + PMD.EOL +
87 " public static void doSomething3() { }" + PMD.EOL +
88 "}";
89
90 private static final String TEST7 =
91 "public class Foo {" + PMD.EOL +
92 " public Foo() { }" + PMD.EOL +
93 " private int x;" + PMD.EOL +
94 " public static void doSomething() {}" + PMD.EOL +
95 "}";
96 }
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