Added UseSingletonRuleTest and refactored out some common Rule Execution

code.


git-svn-id: https://pmd.svn.sourceforge.net/svnroot/pmd/trunk@127 51baf565-9d33-0410-a72c-fc3788e3496d

pmd/regress/test/net/sourceforge/pmd/rules/RuleTst.java

@@ -0,0 +1,53 @@
+package test.net.sourceforge.pmd.rules;
+
+/**
+ * RuleTst
+ *
+ * Extend your Rule TestCases from here to get some
+ * juicy code sharing.
+ */
+
+import java.io.InputStream;
+
+import java.util.List;
+import java.util.ArrayList;
+
+import junit.framework.TestCase;
+
+import net.sourceforge.pmd.*;
+import net.sourceforge.pmd.ast.*;
+
+public class RuleTst
+    extends TestCase
+{
+    public RuleTst( String name ) {
+	super( name );
+    }
+
+    public Report process( String fileName,
+			   Rule rule )
+	throws Throwable
+    {
+	// Set up the Context
+	RuleContext ctx = new RuleContext();
+	ctx.setReport( new Report("xml", fileName) );
+
+	// Parse the file
+	InputStream javaFile =
+	    getClass().getClassLoader().getResourceAsStream( fileName );
+	JavaParser parser = new JavaParser( javaFile );
+	ASTCompilationUnit astCU = parser.CompilationUnit();
+
+	// Collect the ACUs
+	List acus = new ArrayList();
+	acus.add( astCU );
+	
+	// Apply the rules
+	rule.apply( acus, ctx );
+	
+	// Return the report.
+	return ctx.getReport();
+
+    }
+
+}

pmd/regress/test/net/sourceforge/pmd/rules/design/UseSingletonRuleTest.java

@@ -0,0 +1,46 @@
+package test.net.sourceforge.pmd.rules.design;
+
+import test.net.sourceforge.pmd.rules.*;
+
+import java.util.List;
+import java.util.ArrayList;
+
+import java.io.InputStream;
+
+import junit.framework.TestCase;
+
+import net.sourceforge.pmd.*;
+import net.sourceforge.pmd.ast.*;
+import net.sourceforge.pmd.rules.design.*;
+
+public class UseSingletonRuleTest
+    extends RuleTst
+{
+    public UseSingletonRuleTest( String name ) {
+	super( name );
+    }
+
+    public void testUseSingleton1() 
+	throws Throwable 
+    {
+	Report report = process("design/UseSingleton1.java",
+				new UseSingletonRule());
+	assertEquals( 0, report.countViolationsInCurrentFile() );
+    }
+
+    public void testUseSingleton2() 
+	throws Throwable 
+    {
+	Report report = process("design/UseSingleton2.java",
+				new UseSingletonRule());
+	assertEquals( 0, report.countViolationsInCurrentFile() );
+    }
+
+    public void testUseSingleton3() 
+	throws Throwable 
+    {
+	Report report = process("design/UseSingleton3.java",
+				new UseSingletonRule());
+	assertEquals( 0, report.countViolationsInCurrentFile() );
+    }
+}