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You wrote this test but it fails with a NoSuchBeanDefinitionException for TestRestTemplate. What is the likely cause?

medium📝 Debug Q14 of 15
Spring Boot - Testing Spring Boot Applications
You wrote this test but it fails with a NoSuchBeanDefinitionException for TestRestTemplate. What is the likely cause?
\@SpringBootTest
class MyTest {
  \@Autowired
  private TestRestTemplate restTemplate;

  \@Test
  void test() {
    // test code
  }
}
ATestRestTemplate is not a Spring bean
BMissing <code>webEnvironment</code> setting to start web server
CForgot to add <code>@Autowired</code> annotation
DTest class must be public
Step-by-Step Solution
Solution:
  1. Step 1: Identify why TestRestTemplate bean is missing

    By default, @SpringBootTest does not start the web server unless webEnvironment is set, so TestRestTemplate bean is not created.
  2. Step 2: Fix by adding webEnvironment

    Adding webEnvironment = WebEnvironment.RANDOM_PORT or DEFINED_PORT starts the server and creates the bean.
  3. Final Answer:

    Missing webEnvironment setting to start web server -> Option B
  4. Quick Check:

    webEnvironment needed for TestRestTemplate bean [OK]
Quick Trick: Add webEnvironment to enable TestRestTemplate bean [OK]
Common Mistakes:
  • Assuming TestRestTemplate is always available
  • Forgetting to set webEnvironment in @SpringBootTest
  • Thinking @Autowired is missing

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