How to exclude *AutoConfiguration classes in Spring Boot JUnit tests?

Question

I tried:

@RunWith(SpringJUnit4ClassRunner.class)
@EnableAutoConfiguration(exclude=CrshAutoConfiguration.class)
@SpringApplicationConfiguration(classes = Appl         


        

Answer 1

I struggled with this as well and found a simple pattern to isolate the test context after a cursory read of the @ComponentScan docs.

/**
* Type-safe alternative to {@link #basePackages} for specifying the packages
* to scan for annotated components. The package of each class specified will be scanned.
* Consider creating a special no-op marker class or interface in each package
* that serves no purpose other than being referenced by this attribute.
*/
Class[] basePackageClasses() default {};

1. Create a package for your spring tests, ("com.example.test").
2. Create a marker interface in the package as a context qualifier.
3. Provide the marker interface reference as a parameter to basePackageClasses.

---

Example

---

IsolatedTest.java

package com.example.test;

@RunWith(SpringJUnit4ClassRunner.class)
@ComponentScan(basePackageClasses = {TestDomain.class})
@SpringApplicationConfiguration(classes = IsolatedTest.Config.class)
public class IsolatedTest {

     String expected = "Read the documentation on @ComponentScan";
     String actual = "Too lazy when I can just search on Stack Overflow.";

      @Test
      public void testSomething() throws Exception {
          assertEquals(expected, actual);
      }

      @ComponentScan(basePackageClasses = {TestDomain.class})
      public static class Config {
      public static void main(String[] args) {
          SpringApplication.run(Config.class, args);
      }
    }
}

...

TestDomain.java

package com.example.test;

public interface TestDomain {
//noop marker
}