assertNotEquals in JUnit - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to assert that two values are not equal.

JUnit

[1](5, 3);

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

AassertNot

BassertNotEquals

CassertEquals

DassertDifferent

Attempts:

3 left

💡 Hint

Common Mistakes

Using assertEquals instead of assertNotEquals

Misspelling the method name

The assertNotEquals method checks that the two values are not equal, so the test passes if they differ.

2fill in blank

medium

Complete the code to assert that two strings are not equal.

JUnit

[1]("hello", "world");

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

AassertNotEquals

BassertEquals

CassertSame

DassertNull

Attempts:

3 left

💡 Hint

Common Mistakes

Using assertEquals which expects equality

Using assertSame which checks object identity

assertNotEquals checks that the two strings are different, so the test passes if they are not the same.

3fill in blank

hard

Fix the error in the assertion method to check values are not equal.

JUnit

[1](10, 20);

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

AassertNotEquals

BassertTrue

CassertEquals

DassertFalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using assertEquals when values are different

Confusing assertTrue and assertFalse for equality checks

The test should use assertNotEquals to verify the two values are not equal. Using assertEquals here would fail because the values are different.

4fill in blank

hard

Fill both blanks to assert two objects are not equal with a message.

JUnit

[1]("Objects should differ", obj1, [2]);

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

AassertNot

BassertEquals

Cobj2

DassertNotEquals

Attempts:

3 left

💡 Hint

Common Mistakes

Using assertEquals instead of assertNotEquals

Passing the wrong object as the second argument

The correct method is assertNotEquals and the second object to compare is obj2. The message helps explain the test.

5fill in blank

hard

Fill all three blanks to assert two integers are not equal with a custom failure message.

JUnit

[1]("Values must not be equal", [2], [3]);

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

AassertEquals

B5

C10

DassertNotEquals

Attempts:

3 left

💡 Hint

Common Mistakes

Using assertEquals which expects equality

Using the same integer values causing test failure

The method assertNotEquals checks inequality. The two integers compared are 5 and 10. The message explains the test purpose.