Junit testing for a class with strings

Junit testing for a class with strings

By : user2948833
Date : November 15 2020, 06:54 AM
I wish this help you A few things here:
Remove the logger from the test. A test should pass or fail, no need for logging Don't use assertTrue for this. If the test fails it will give you no information about /why/ it failed.
code :
public void testDocDatatypeFromName()
    DocDatatype actualDocType = DocDatatype.fromString("Profile");
    assertSame(DocDataType.PROFILE, actualDocType);
public void testDocDatatypeFromName()
    DocDatatype d= DocDatatype.fromString("Profile");
    assertEquals("Profile", d.toString());

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JUnit testing groovy scripts results in "unable to resolve class" from the JUnit test file which attempts to t

JUnit testing groovy scripts results in "unable to resolve class" from the JUnit test file which attempts to t

By : user3520109
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Ok I figured out the issue. For some reason I need to compile all the groovy scripts that my tests will use even though I don't have to compile any of them if I just call them using groovy (ie. standard groovy usage). I hope this saves other people some time in debugging. To compile a file just use
code :
gsuite.compile("<file name>");
Testing a Static Methods Class had to be Changed to a Singleton For JUnit Testing

Testing a Static Methods Class had to be Changed to a Singleton For JUnit Testing

By : kkidfall
Date : March 29 2020, 07:55 AM
I wish this help you Your tester probably finds this code difficult to test as they can't easily change the return value of android.os.Build.VERSION.SDK_INT, and therefore they can't easily test the different code paths that are used depending on this return value. By using an instance method they can use a mocking framework to fake the _checkOSTen method to return either true or false, depending on what they are trying to test.
Another way to do testing is to not use static methods such as these at all, and instead use class (perhaps called DeviceCapabilities) which will be injected via a setter or a constructor into every other class that requires knowledge of the version of the OS.
Eclipse JUnit testing of outer and nested class tests, @RunWith(Enclosed.class)

Eclipse JUnit testing of outer and nested class tests, @RunWith(Enclosed.class)

By : cyberdoc
Date : March 29 2020, 07:55 AM
this will help Enclosed does not run the tests in the top level class, only the tests in the static inner classes.
Put your tests into an inner class.
Junit - testing a different class

Junit - testing a different class

By : user3846809
Date : March 29 2020, 07:55 AM
will help you The design of your class doesn't really lend itself to automated testing.
The only methods in the class are private static, meaning that they can only be accessed from other static methods inside this class (though it is possible to use Reflection to overcome this if you absolutely must have private static members.) Parts of the class require user input / intervention, which makes it difficult to test them automatically. Your class isn't object-oriented. It is written more like a functional program (e.g. C), with a main body and global functions, rather than written as an object that provides functionality.
code :
import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Calculator {

    // TODO: Move enum to another file
    public static enum OperatorType {

    public double calculateResult(double operand1, double operand2, OperatorType operator) {
        double result = 0;;
        switch (operator) {
            case ADD:
                result = addValues(operand1, operand2);
            case DIVIDE:
                result = subtractValues(operand1, operand2);
            case MULTIPLY:
                result = multiplyValues(operand1, operand2);
            case SUBTRACT:
                result = subtractValues(operand1, operand2);

        return result;

    public double divideValues(double d1, double d2) {
        double result;
        if (d2 != 0) {
            result = d1 / d2;
        } else {
            // Avoid divide-by-zero error (could also throw it if preferred)
            result = 0;
        return result;

    public double multiplyValues(double d1, double d2) {
        double result = d1 * d2;
        return result;

    public double subtractValues(double d1, double d2) {
        double result = d1 - d2;
        return result;

    public double addValues(double d1, double d2) {
        double result = d1 + d2;
        return result;

    public static void main(String[] args) {
        // Get and validate user input
        String s1 = getInput("Enter a numeric value: ");
        String s2 = getInput("Enter a numeric value: ");
        String op = getInput("Enter 1=ADD, 2=Subtract, 3=Multiply, 4=Divide ");

        // TODO: Handle NumberFormatExceptions here
        double operand1 = Double.parseDouble(s1);
        double operand2 = Double.parseDouble(s2);
        OperatorType operator;

        int opInt = Integer.parseInt(op);
        switch (opInt) {
            case 1:
                operator = OperatorType.ADD;
            case 2:
                operator = OperatorType.SUBTRACT;
            case 3:
                operator = OperatorType.MULTIPLY;
            case 4:
                operator = OperatorType.DIVIDE;

                System.out.println("You entered an incorrect value");

        // Use class to calculate result
        Calculator calculator = new Calculator();
        double result = calculator.calculateResult(operand1, operand2, operator);

        // Output results
        System.out.println("The answer is " + result);

    private static String getInput(String prompt) {
        BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));


        try {
            return stdin.readLine();
        } catch (Exception e) {
            return "error: " + e.getMessage();
how to instantiate objects inside the class to be tested is an abstract class in Junit testing?

how to instantiate objects inside the class to be tested is an abstract class in Junit testing?

By : antibody
Date : March 29 2020, 07:55 AM
will be helpful for those in need I have a class below for which I want to write a unit test , You can use Mockito
code :
class ProductImplTest {
    @Mock DataService dService;
    @InjectMocks ProductImpl sut;

    public void test() {
        ResponseObject ro = new ResponseObject();

        String string = "string";
        Long longVal = Long.valueOf(123);

        sut.parse("string", longVal);

        // you should use setters (ie setId()), then you can mock the ResponseObject and use
        // verify(ro).setId("string");
interface ResponseObject {
    void setId(String id);
    String getId();
    // same for code
@Test public void test() {
    ResponseObject ro = mock(ResponseObject.class);
    // ... same as above, but
    verify(ro).setId("string"); // no need to test getId for a mock
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