ComplexityCalculatorTest.java

/*
 * Cobertura - http://cobertura.sourceforge.net/
 *
 * Copyright (C) 2005 Grzegorz Lukasik
 * 
 * Cobertura is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2 of the License,
 * or (at your option) any later version.
 *
 * Cobertura is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Cobertura; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */
package net.sourceforge.cobertura.reporting;

import net.sourceforge.cobertura.coveragedata.ClassData;
import net.sourceforge.cobertura.coveragedata.PackageData;
import net.sourceforge.cobertura.coveragedata.ProjectData;
import net.sourceforge.cobertura.coveragedata.SourceFileData;
import net.sourceforge.cobertura.util.FileFinder;
import net.sourceforge.cobertura.util.FileFixture;
import junit.framework.TestCase;

public class ComplexityCalculatorTest extends TestCase {
    private FileFixture fileFixture;
    private FileFinder fileFinder;
    private ComplexityCalculator complexity;
	
    public void testGetCCNForSourceFile() {
    	/*
    	 * Sample1.java has a @Deprecated annotation to make sure the complexity works with annotations.
    	 */
    	double ccn1 = complexity.getCCNForSourceFile( new SourceFileData("com/example/Sample1.java"));
    	assertTrue( ccn1!=0.0);
    	double ccn2 = complexity.getCCNForSourceFile( new SourceFileData("com/example/Sample2.java"));
    	assertTrue( ccn2!=0.0);
    	assertTrue( ccn1!=ccn2);

    	ccn1 = complexity.getCCNForSourceFile( new SourceFileData("com/example/Sample5.java"));
    	assertTrue( ccn1!=0.0);
    	ccn2 = complexity.getCCNForSourceFile( new SourceFileData("com/example/Sample6.java"));
    	assertTrue( ccn2!=0.0);
    	assertTrue( ccn1!=ccn2);

    	double ccn0 = complexity.getCCNForSourceFile( new SourceFileData("com/example/Sample8.java"));
    	assertTrue( ccn0==0.0);

    	ccn0 = complexity.getCCNForSourceFile( new SourceFileData("Foo.java"));
    	assertTrue( ccn0==0.0);
    }

    public void testGetCCNForClass() {
    	double ccn1 = complexity.getCCNForClass( new ClassData("com.example.Sample3"));
    	assertTrue( ccn1!=0.0);
    	double ccn2 = complexity.getCCNForClass( new ClassData("com.example.Sample4"));
    	assertTrue( ccn2!=0.0);
    	assertTrue( ccn1!=ccn2);

    	ccn1 = complexity.getCCNForClass( new ClassData("com.example.Sample5"));
    	assertTrue( ccn1!=0.0);
    	ccn2 = complexity.getCCNForClass( new ClassData("com.example.Sample6"));
    	assertTrue( ccn2!=0.0);
    	assertTrue( ccn1!=ccn2);

    	double ccn0 = complexity.getCCNForClass( new ClassData("com.example.Sample8"));
    	assertEquals( 0.0, ccn0, 0.0);

    	ccn0 = complexity.getCCNForClass( new ClassData("Foo"));
    	assertEquals( 0.0, ccn0, 0.0);
    }

    public void testGetCCNForPackage() {
    	PackageData pd = new PackageData("com.example");
    	pd.addClassData( new ClassData("com.example.Sample3"));
    	double ccn1 = complexity.getCCNForPackage( pd);
    	assertTrue( ccn1!=0.0);

    	ComplexityCalculator complexity2 = new ComplexityCalculator( fileFinder);
    	pd.addClassData( new ClassData("com.example.Sample4"));
    	double ccn2 = complexity2.getCCNForPackage( pd);
    	double ccn3 = complexity2.getCCNForPackage( pd);
    	assertTrue( ccn2!=0.0);
    	assertTrue( ccn1!=ccn2);
    	assertEquals( ccn2, ccn3, 0e-9);

    	PackageData empty = new PackageData( "com.example2");
    	ComplexityCalculator complexity3 = new ComplexityCalculator( fileFinder);
    	assertEquals( 0.0, complexity3.getCCNForPackage( empty), 0.0);
    }

    public void testGetCCNForProject() {
    	ProjectData project = new ProjectData();
    	project.addClassData( new ClassData("com.example.Sample5"));
    	double ccn1 = complexity.getCCNForProject( project);
    	assertTrue( ccn1!=0.0);

    	ComplexityCalculator complexity2 = new ComplexityCalculator( fileFinder);
    	project.addClassData( new ClassData("com.example.Sample4"));
    	double ccn2 = complexity2.getCCNForProject( project);
    	assertTrue( ccn2!=0.0);
    	assertTrue( ccn1!=ccn2);
    	
    	ComplexityCalculator complexity3 = new ComplexityCalculator( fileFinder);
    	project.addClassData( new ClassData("com.example.Sample8"));
    	double ccn3 = complexity3.getCCNForProject( project);
    	assertEquals( ccn2, ccn3, 0e-9);

    	ComplexityCalculator complexity4 = new ComplexityCalculator( fileFinder);
    	double ccn0 = complexity4.getCCNForProject( new ProjectData());
    	assertEquals( 0.0, ccn0, 0.0);
    }

    public void testGetCCNForSourceFile_null() {
    	try {
    		complexity.getCCNForSourceFile(null);
    		fail( "NullPointerException expected");
    	} catch( NullPointerException ex) {}
    }
    
    public void testGetCCNForPackage_null() {
    	try {
    		complexity.getCCNForPackage(null);
    		fail( "NullPointerException expected");
    	} catch( NullPointerException ex) {}
    }

   	public void testGetCCNForProject_null() {
    	try {
    		complexity.getCCNForProject(null);
    		fail( "NullPointerException expected");
    	} catch( NullPointerException ex) {}
   	}
    
    public void testConstructor_null() {
    	try {
    		new ComplexityCalculator(null);
    		fail( "NullPointerException expected");
    	} catch( NullPointerException ex) {}
    }

   	
    protected void setUp() throws Exception {
        super.setUp();
        fileFixture = new FileFixture();
        fileFixture.setUp();

        fileFinder = new FileFinder();
        fileFinder.addSourceDirectory(fileFixture.sourceDirectory(FileFixture.SOURCE_DIRECTORY_IDENTIFIER[0]).toString());
        fileFinder.addSourceDirectory(fileFixture.sourceDirectory(FileFixture.SOURCE_DIRECTORY_IDENTIFIER[1]).toString());
        fileFinder.addSourceFile( fileFixture.sourceDirectory(FileFixture.SOURCE_DIRECTORY_IDENTIFIER[2]).toString(), "com/example\\Sample5.java");
        fileFinder.addSourceFile( fileFixture.sourceDirectory(FileFixture.SOURCE_DIRECTORY_IDENTIFIER[2]).toString(), "com/example/Sample6.java");
        fileFinder.addSourceFile( fileFixture.sourceDirectory(FileFixture.SOURCE_DIRECTORY_IDENTIFIER[3]).toString(), "com/example/Sample7.java");

        // Do not add com/example/Sample8.java
        // fileFinder.addSourceFile( fileFixture.sourceDirectory(FileFixture.SOURCE_DIRECTORY_IDENTIFIER[3]).toString(), "com/example/Sample8.java");
        
        complexity = new ComplexityCalculator( fileFinder);
    }

    protected void tearDown() throws Exception {
        super.tearDown();
        fileFixture.tearDown();
    }
}