linghengqian commented on issue #29657:
URL:
https://github.com/apache/shardingsphere/issues/29657#issuecomment-1913659844
- To be honest, I hit a limitation of Java itself while trying to write a
unit test for `System.getenv()`. Of course I know that `System.getenv()` almost
certainly serves the usage process of Docker Image.
- `@org.junitpioneer.jupiter.SetEnvironmentVariable` of
`org.junit-pioneer:junit-pioneer:2.2.0` requires additional `--add-open` for
`maven-surefire-plugin` on JDK21, which This is something I hope to avoid at
this stage because it involves questionable changes on the JDK22-ea milestone.
- `uk.org.webcompere:system-stubs-jupiter:2.1.6` will break
ShardingSphere's unit test CI for JDK8 because it uses JDK11's bytecode.
- `com.github.stefanbirkner:system-rules:1.19.0` and
`com.github.stefanbirkner:system-lambda:1.2.1` will break ShardingSphere's unit
test CI for JDK17+. They lack maintenance.
- For Mockito 4, I personally don't think the method of `Mockito.spy` is
appropriate, and doing `Mockito.spy` on `ShardingSphereURLManager` is too
weird. Of course we can do this, but unit testing will look a lot more obscure.
- It's hard for me to imagine that there will be a good way to simulate
environment variables on JDK8-JDK21 before ShardingSphere improves the JDK
baseline to JDK11. Yes, the runtime requirement for ShardingSphere has always
been JDK8.
- Rather than using `Environment Variables`(`System.getenv()`), I personally
prefer to use `System Property Variables`(`System.getProperty()`). I anticipate
adjusting the final outcome in this direction. Another idea is to set
`Args`/`buildArgs` directly on the ShardingSphere URL string.
- The regular expression of `\$\$\{(.+?)\}$` also looks good. Although more
can be restricted. Expecting a match like
```yaml
dataSources:
ds_0:
dataSourceClassName: com.zaxxer.hikari.HikariDataSource
driverClassName: org.h2.Driver
jdbcUrl: $${FIXTURE_JDBC_URL:jdbc:h2:mem:foo_ds_do_not_use}
username: sa
password:
```
- I'm still organizing a PR for this issue. But my vacations are always full
of fun things to distract me.
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