@CsvFileSource for external CSV in JUnit - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to load CSV data from an external file using @CsvFileSource.

JUnit

@ParameterizedTest
@CsvFileSource(resources = [1])
void testWithCsvFileSource(String input, int expected) {
    assertNotNull(input);
    assertTrue(expected >= 0);
}

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

A"data/test-data.csv"

B"/data/test-data.csv"

C"/test-data.csv"

D"test-data.csv"

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the leading slash in the resource path.

Using an incorrect file path that does not exist.

The resource path must start with a slash to load the CSV file from the classpath root.

2fill in blank

medium

Complete the code to skip the first line (header) of the CSV file in @CsvFileSource.

JUnit

@ParameterizedTest
@CsvFileSource(resources = "/data/test-data.csv", [1] = 1)
void testSkipHeader(String input, int expected) {
    assertNotNull(input);
    assertTrue(expected >= 0);
}

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

AnumLinesToSkip

BskipLines

CskipHeader

DlinesToSkip

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect attribute names like skipLines or skipHeader.

Not skipping the header line causing test failures.

The correct attribute to skip lines in @CsvFileSource is numLinesToSkip.

3fill in blank

hard

Fix the error in the @CsvFileSource annotation to correctly specify the file path.

JUnit

@ParameterizedTest
@CsvFileSource(resources = [1])
void testFilePath(String input) {
    assertNotNull(input);
}

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

A"/data/test.csv"

B"data/test.csv"

C"./data/test.csv"

D"data\\test.csv"

Attempts:

3 left

💡 Hint

Common Mistakes

Using relative paths without leading slash.

Using backslashes which are invalid in resource paths.

The resource path must start with a slash and use forward slashes for classpath resources.

4fill in blank

hard

Fill both blanks to correctly configure @CsvFileSource to skip the header and use a UTF-8 encoding.

JUnit

@ParameterizedTest
@CsvFileSource(resources = "/data/test-data.csv", [1] = 1, [2] = "UTF-8")
void testWithEncoding(String input, int expected) {
    assertNotNull(input);
    assertTrue(expected >= 0);
}

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

AnumLinesToSkip

Bencoding

Ccharset

DskipLines

Attempts:

3 left

💡 Hint

Common Mistakes

Using charset instead of encoding.

Using skipLines which is not a valid attribute.

Use numLinesToSkip to skip header lines and encoding to specify file encoding in @CsvFileSource.

5fill in blank

hard

Fill all three blanks to create a @CsvFileSource that loads a CSV file, skips the first line, and uses UTF-8 encoding.

JUnit

@ParameterizedTest
@CsvFileSource(resources = [1], [2] = 1, [3] = "UTF-8")
void testFullConfig(String input, int expected) {
    assertNotNull(input);
    assertTrue(expected >= 0);
}

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

A"/data/test.csv"

BnumLinesToSkip

Cencoding

D"data/test.csv"

Attempts:

3 left

💡 Hint

Common Mistakes

Using relative path without slash.

Wrong attribute names for skipping lines or encoding.

The resource path must start with a slash, numLinesToSkip skips the header, and encoding sets UTF-8.