@CsvFileSource reads CSV records from classpath resources for each invocation of a @ParameterizedTest.

Java source and doc

Definition of CsvFileSource

package org.junit.jupiter.params.provider;
   ........
@Target({ElementType.ANNOTATION_TYPE, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@API(status = EXPERIMENTAL, since = "5.0")
@ArgumentsSource(CsvFileArgumentsProvider.class)
public @interface CsvFileSource {
    String[] resources(); 1
    String encoding() default "UTF-8"; 2
    String lineSeparator() default "\n"; 3
    char delimiter() default ','; 4
}

Examples

src/test/resources/numbers.csv

first,second,sum
1,2,3
10,20,30
7,5,12

package com.logicbig.example;

import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvFileSource;

import static org.junit.jupiter.api.Assertions.assertEquals;

public class ParameterizedCsvFileSourceTest {

    @ParameterizedTest(name = "#{index} {0} + {1} = {2}")
    @CsvFileSource(resources = "/numbers.csv", numLinesToSkip = 1)
    void sumFromCsv(int a, int b, int expectedSum) {
        assertEquals(expectedSum, a + b);
    }
}

mvn test -Dtest=ParameterizedCsvFileSourceTest

Output

D:\example-projects\junit-5\junit-5-parameterized-tests\junit-5-parameterized-csvfilesource>mvn test -Dtest=ParameterizedCsvFileSourceTest
[INFO] Scanning for projects...
[INFO] 
[INFO] ------< com.logicbig.example:junit-5-parameterized-csvfilesource >-------
[INFO] Building junit-5-parameterized-csvfilesource 1.0-SNAPSHOT
[INFO]   from pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- resources:3.3.1:resources (default-resources) @ junit-5-parameterized-csvfilesource ---
[INFO] skip non existing resourceDirectory D:\example-projects\junit-5\junit-5-enabling-disabling-tests\junit-5-parameterized-tests\junit-5-parameterized-csvfilesource\src\main\resources
[INFO] 
[INFO] --- compiler:3.14.1:compile (default-compile) @ junit-5-parameterized-csvfilesource ---
[INFO] No sources to compile
[INFO] 
[INFO] --- resources:3.3.1:testResources (default-testResources) @ junit-5-parameterized-csvfilesource ---
[INFO] Copying 1 resource from src\test\resources to target\test-classes
[INFO] 
[INFO] --- compiler:3.14.1:testCompile (default-testCompile) @ junit-5-parameterized-csvfilesource ---
[INFO] Recompiling the module because of changed source code.
[INFO] Compiling 1 source file with javac [debug target 25] to target\test-classes
[INFO] 
[INFO] --- surefire:3.5.0:test (default-test) @ junit-5-parameterized-csvfilesource ---
[INFO] Using auto detected provider org.apache.maven.surefire.junitplatform.JUnitPlatformProvider
[INFO] 
[INFO] -------------------------------------------------------
[INFO]  T E S T S
[INFO] -------------------------------------------------------
[INFO] +--com.logicbig.example.ParameterizedCsvFileSourceTest - 0.315 ss
[INFO] |  +-- [OK] sumFromCsv(int, int, int) #1 "1" + "2" = "3" - 0.100 ss
[INFO] |  +-- [OK] sumFromCsv(int, int, int) #2 "10" + "20" = "30" - 0.004 ss
[INFO] |  '-- [OK] sumFromCsv(int, int, int) #3 "7" + "5" = "12" - 0.002 ss
[INFO] 
[INFO] Results:
[INFO] 
[INFO] Tests run: 3, Failures: 0, Errors: 0, Skipped: 0
[INFO] 
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  6.532 s
[INFO] Finished at: 2025-12-04T14:06:19+08:00
[INFO] ------------------------------------------------------------------------

Example Project

Dependencies and Technologies Used:

• junit-jupiter-engine 6.0.1 (Module "junit-jupiter-engine" of JUnit)
   Version Compatibility: 5.0.0 - 6.0.1Version List
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  Version compatibilities of junit-jupiter-engine with this example:

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  Versions in green have been tested.

• junit-jupiter-params 6.0.1 (Module "junit-jupiter-params" of JUnit)
  
• JDK 25
• Maven 3.9.11