Argument matchers (any, eq) in JUnit - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to verify a method call with any String argument.

JUnit

verify(mockObject).someMethod([1]());

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

AanyString

Beq

CanyInt

DisNull

Attempts:

3 left

💡 Hint

Common Mistakes

Using eq without specifying the exact argument.

Using anyInt() which matches integers, not strings.

The anyString() matcher matches any String argument in the method call verification.

2fill in blank

medium

Complete the code to verify a method call with an exact argument "test".

JUnit

verify(mockObject).someMethod([1]("test"));

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

Aany

BanyString

Ceq

DisNull

Attempts:

3 left

💡 Hint

Common Mistakes

Using anyString() which matches any string, not the exact one.

Using any() without specifying the type.

The eq("test") matcher verifies the method was called with the exact argument "test".

3fill in blank

hard

Fix the error in the verification by choosing the correct matcher for any Integer argument.

JUnit

verify(mockObject).someMethod([1]());

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

Aeq

BanyInt

CanyString

DanyDouble

Attempts:

3 left

💡 Hint

Common Mistakes

Using anyString() which matches strings, not integers.

Using eq() without specifying the exact integer.

The anyInt() matcher correctly matches any Integer argument in the method call.

4fill in blank

hard

Fill both blanks to verify a method called with exact String "hello" and any Integer argument.

JUnit

verify(mockObject).someMethod([1]("hello"), [2]());

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

Aeq

BanyInt

CanyString

DisNull

Attempts:

3 left

💡 Hint

Common Mistakes

Using anyString() for the first argument instead of eq().

Using eq() for the second argument without specifying a value.

Use eq("hello") to match the exact String and anyInt() to match any Integer argument.

5fill in blank

hard

Fill all three blanks to verify a method called with any String, exact Integer 5, and any Boolean argument.

JUnit

verify(mockObject).someMethod([1](), [2](5), [3]());

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

AanyString

Beq

CanyBoolean

DanyInt

Attempts:

3 left

💡 Hint

Common Mistakes

Using anyInt() instead of eq(5) for the exact integer.

Using eq() without argument for the Boolean.

Use anyString() for any String, eq(5) for exact Integer 5, and anyBoolean() for any Boolean argument.