This example demonstrates how to use 'properties' attribute of @TestPropertySource to specify inlined properties. The inlined properties will override properties coming from the sources loaded via 'locations' attribute (if specified any).
Example
Creating a Spring application
package com.logicbig.example;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
@Service
public class ReportService {
@Value("${report-subscriber:admin@example.com}")
private String theSubscriber;
public String getReportSubscriber() {
return theSubscriber;
}
}
App Property file
src/main/resources/prod.propertiesreport-subscriber=theManager@example.com
Main Class
package com.logicbig.example;
import org.springframework.context.annotation.*;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
@PropertySource("classpath:prod.properties")
@Configuration
@ComponentScan
public class AppConfig {
@Bean
public static PropertySourcesPlaceholderConfigurer propertyConfigInDev() {
return new PropertySourcesPlaceholderConfigurer();
}
public static void main(String[] args) {
AnnotationConfigApplicationContext context =
new AnnotationConfigApplicationContext(AppConfig.class);
ReportService rs = context.getBean(ReportService.class);
System.out.println(rs.getReportSubscriber());
}
}OutputtheManager@example.com
Test Folder
Property file
src/main/resources/src/test/resources/test.propertiesreport-subscriber=theDeveloper@example.com
The JUnit test
package com.logicbig.example;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.TestPropertySource;
import org.springframework.test.context.junit.jupiter.SpringExtension;
import static org.junit.jupiter.api.Assertions.assertEquals;
@ExtendWith(SpringExtension.class)
@ContextConfiguration(classes = AppConfig.class)
@TestPropertySource(locations = "classpath:test.properties",
properties = "report-subscriber=tester@example.com")
public class ReportServiceTests {
@Autowired
private ReportService reportService;
@Test
public void testReportSubscriber() {
String s = reportService.getReportSubscriber();
System.out.println(s);
assertEquals("tester@example.com", s);
}
}
Output$ mvn test -Dtest=ReportServiceTests
[INFO] Scanning for projects...
[INFO]
[INFO] --< com.logicbig.example:test-property-source-with-inlined-properties >--
[INFO] Building test-property-source-with-inlined-properties 1.0-SNAPSHOT
[INFO] from pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- resources:3.3.1:resources (default-resources) @ test-property-source-with-inlined-properties ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 2 resources from src\main\resources to target\classes
[INFO]
[INFO] --- compiler:3.3:compile (default-compile) @ test-property-source-with-inlined-properties ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- resources:3.3.1:testResources (default-testResources) @ test-property-source-with-inlined-properties ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 1 resource from src\test\resources to target\test-classes
[INFO]
[INFO] --- compiler:3.3:testCompile (default-testCompile) @ test-property-source-with-inlined-properties ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- surefire:3.2.5:test (default-test) @ test-property-source-with-inlined-properties ---
[INFO] Using auto detected provider org.apache.maven.surefire.junitplatform.JUnitPlatformProvider
[WARNING] file.encoding cannot be set as system property, use <argLine>-Dfile.encoding=...</argLine> instead
[INFO]
[INFO] -------------------------------------------------------
[INFO] T E S T S
[INFO] -------------------------------------------------------
[INFO] Running com.logicbig.example.ReportServiceTests
tester@example.com
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.790 s -- in com.logicbig.example.ReportServiceTests
[INFO]
[INFO] Results:
[INFO]
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 5.656 s
[INFO] Finished at: 2026-01-31T13:22:09+08:00
[INFO] ------------------------------------------------------------------------
Example ProjectDependencies and Technologies Used: - spring-context 7.0.3 (Spring Context)
Version Compatibility: 5.0.0.RELEASE - 7.0.3 Version compatibilities of spring-context with this example: Versions in green have been tested.
- spring-test 7.0.3 (Spring TestContext Framework)
- junit-jupiter-engine 6.0.2 (Module "junit-jupiter-engine" of JUnit)
- JDK 25
- Maven 3.9.11
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