assertEquals in JUnit - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the expected value equals the actual value using JUnit.

JUnit

assertEquals([1], actualValue);

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A"expected"

BactualValue

CexpectedValue

Dresult

Attempts:

3 left

💡 Hint

Common Mistakes

Putting the actual value as the first argument instead of the expected value.

Using a variable that is not defined.

The assertEquals method compares the expected value to the actual value. The first argument should be the expected value.

2fill in blank

medium

Complete the code to assert that two strings are equal in a JUnit test.

JUnit

assertEquals([1], "Hello World");

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A"World"

B"Hello World"

C"Hello"

D"hello world"

Attempts:

3 left

💡 Hint

Common Mistakes

Using a string with different case or spelling.

Swapping expected and actual values.

The expected string must exactly match the actual string for assertEquals to pass.

3fill in blank

hard

Fix the error in the assertion to correctly compare two integers.

JUnit

assertEquals([1], 5);

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A5

B"5"

Cfive

D5.0

Attempts:

3 left

💡 Hint

Common Mistakes

Using a string "5" instead of integer 5.

Using a floating point number 5.0.

The expected value must be an integer 5, not a string or float, to match the actual integer value.

4fill in blank

hard

Fill both blanks to assert that the method returns the expected boolean value.

JUnit

assertEquals([1], [2]);

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Atrue

Bfalse

CisValid()

DcheckResult()

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping expected and actual values.

Using a method that does not return a boolean.

The expected value is true and the actual value is the result of isValid() method.

5fill in blank

hard

Fill all three blanks to assert that the method returns the expected string with a custom failure message.

JUnit

assertEquals([1], [2], [3]);

Drag options to blanks, or click blank then click option'

A"Expected greeting did not match"

BgetGreeting()

C"Hello, Tester!"

D"Greeting mismatch"

Attempts:

3 left

💡 Hint

Common Mistakes

Putting the message in the wrong position.

Swapping expected and actual values.

The first blank is the failure message, the second is the expected string, and the third is the actual method call.