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Refine SpringBootTest.useMainMethod support

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Refine `SpringBootContextLoader` so that calls to the main method do
not exit early and the hook is only used when necessary.

See gh-22405
This commit is contained in:
Phillip Webb
2022-09-15 10:10:02 -07:00
parent f1b60eef55
commit 48f3cd75d4
3 changed files with 37 additions and 24 deletions
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spring-boot-project/spring-boot-docs/src/docs/asciidoc/features/testing.adoc
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@@ -154,7 +154,7 @@ For example, here is an application that changes the banner mode and sets additi
include::code:custom/MyApplication[]
Since customizations in the `main` method can affect the resulting `ApplicationContext`, Spring Boot will also attempt to use the `main` method for tests.
By default, `@SpringBootTest` will detect any `main` method on your `@SpringBootConfiguration` and run it up to the point that the `SpringApplication.run` method is called.
By default, `@SpringBootTest` will detect any `main` method on your `@SpringBootConfiguration` and run it in order to capture the `ApplicationContext`.
If your `@SpringBootConfiguration` class doesn't have a main method, the class itself is used directly to create the `ApplicationContext`.
In some situations, you may find that you can't or don't want to run the `main` method in your tests.