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Java Code Coverage Testing Guide

The document discusses code coverage testing in Java. It describes four types of code coverage: statement coverage, function coverage, branch coverage, and condition coverage. It then provides an example of implementing statement coverage testing on a StudentInfo class using Eclipse IDE. Tests are created using JUnit to check that each statement in the StudentInfo class is executed. The results of running the JUnit tests and viewing the code coverage metrics in Eclipse are also shown.

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146 views17 pages

Java Code Coverage Testing Guide

The document discusses code coverage testing in Java. It describes four types of code coverage: statement coverage, function coverage, branch coverage, and condition coverage. It then provides an example of implementing statement coverage testing on a StudentInfo class using Eclipse IDE. Tests are created using JUnit to check that each statement in the StudentInfo class is executed. The results of running the JUnit tests and viewing the code coverage metrics in Eclipse are also shown.

Uploaded by

Mallika
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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1.

CODE COVERAGE TESTING

1. AIM

To study and implement the various types of code coverage testing using automated tools in
java environment.

CODE COVERAGE / TEST COVERAGE

 Code coverage analysis is used to measure the quality of software testing, usually using
dynamic execution flow analysis.

TYPES OF CODE COVERAGE

1. Statement Coverage (Line Coverage)

 Check, whether each statement or line in the program has executed or not

2. Function Coverage

 Check, whether each method or function or class in the program has executed or
not

3. Branch Coverage / Decision Coverage

 Check, whether each branch of each control structure (like if and case
statements) in the program has executed or not

 It does not focus the Boolean condition in control structure

4. Condition Coverage / Predicate Coverage

 Check, whether each Boolean sub expression evaluated both to true or false in
the program

 It mainly focus the Boolean condition in control structure

I. STATEMENT COVERAGE

 It checks whether each statement or line in the program has executed or not

 It includes

 Expression statement, declaration statements

 Return statement, control flow statements (e.g. if, if-else, for, while)

 Break, Continue Statement

1
Formula
SC= Number of statements exercised
X 100
Total number of statements
Drawbacks
 It does not execute false statements

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I. EXAMPLE OF STATEMENT COVERAGE TESTING

(TESTING STUDENT INFORMATION)


USED IDE: ECLIPSE KEPLER IDE

1. PROJECT CREATION IN ECLIPSE IDE

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2. PROJECT SETTINGS

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3. PROJECT TREE

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4. CREATING A NEW CLASS IN ECLIPSE IDE

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5. SOURCE CODE
(StudentInfo.java)

import java.io.*;

public class StudentInfo {

DataInputStream ds=new DataInputStream(System.in);

String name;

int id;

String dept;

public void input()throws Exception

System.out.print("Enter Student Name: ");

name=ds.readLine();

System.out.print("Enter Student Id: ");

id=Integer.parseInt(ds.readLine());

System.out.print("Enter Student Dept: ");

dept=ds.readLine();

public void result()throws Exception

input();

System.out.println("-----------------------------");

System.out.println("\tStudent Details");

System.out.println("-----------------------------");

System.out.println("Name\t:"+name);

System.out.println("Id\t:"+id);

System.out.println("Dept\t:"+dept);

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6. ADDING JUNIT TESTCASE TO EXISTING CLASS

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7. SET THE NEW NAME TO JUNIT TEST CASE

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8. METHODS SELECTION TO JUNIT TESTING

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9. ADDING JUNIT 4

TEST CLASS

(StudentInfoTest.java)

import static org.junit.Assert.*;

import org.junit.Test;

public class StudentInfoTest {

// create an object for existing class

StudentInfo obj=new StudentInfo();

@Test

public void testResult()throws Exception {

// call loop coverage via JUNIT

obj.result();

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10. RUNNING TEST CLASS

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11. GENERAL OUTPUT

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12. JUNIT TEST RESULT

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13. RESULT
13.1 SELECT PROJECT PROPERTIES IN ECLIPSE IDE

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14. COVERAGE RESULT
14.1 RESULT (A)

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14.2 RESULT (B): OVERALL PROJECT COVERAGE RESULT

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