Multiple parameter types in JUnit - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a parameterized test method with two parameters.

JUnit

[1] void testMethod(int number, String text) {}

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

A@Test

B@ParameterizedTest

C@CsvSource

D@ValueSource

Attempts:

3 left

💡 Hint

Common Mistakes

Using @Test instead of @ParameterizedTest for parameterized tests.

Placing the annotation inside the parameter list.

To declare a parameterized test method, use the @ParameterizedTest annotation before the method declaration.

2fill in blank

medium

Complete the code to provide multiple parameters using CSV source.

JUnit

@ParameterizedTest
@CsvSource([1])
void testMethod(int number, String text) {}

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

A"1,apple", "2,banana"

B"1, 'apple', 2, 'banana'"

C"1;apple", "2;banana"

D"1|apple", "2|banana"

Attempts:

3 left

💡 Hint

Common Mistakes

Using semicolons or pipes instead of commas as separators.

Putting all values in one string instead of separate strings.

The @CsvSource annotation expects an array of strings, each string representing a line of CSV values separated by commas. So the correct format is "1,apple", "2,banana".

3fill in blank

hard

Fix the error in the parameterized test method declaration.

JUnit

@ParameterizedTest
@CsvSource({"1,apple", "2,banana"})
void testMethod([1] number, String text) {}

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

Aint

Bdouble

CString

Dboolean

Attempts:

3 left

💡 Hint

Common Mistakes

Using String instead of int for numeric CSV values.

Using incompatible types like boolean or double.

The first parameter corresponds to the first CSV value which is an integer, so the parameter type must be int.

4fill in blank

hard

Fill both blanks to correctly declare a parameterized test with multiple parameter types and source.

JUnit

@ParameterizedTest
@CsvSource([1])
void testMethod([2] number, String text) {}

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

A"3,orange", "4,grape"

Bint

CString

D"3;orange", "4;grape"

Attempts:

3 left

💡 Hint

Common Mistakes

Using semicolons instead of commas in CSV strings.

Using String type for numeric parameters.

The @CsvSource needs strings with comma-separated values, so "3,orange", "4,grape" is correct. The parameter type for number is int.

5fill in blank

hard

Fill all three blanks to complete a parameterized test method with multiple parameter types and CSV source.

JUnit

@ParameterizedTest
@CsvSource([1])
void testMethod([2] number, [3] text) {}

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

A"5,melon", "6,berry"

Bint

CString

Ddouble

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong separators in CSV strings.

Mixing up parameter types.

The CSV source strings must be comma-separated values. The first parameter is an int matching the first CSV value, and the second parameter is a String matching the second CSV value.