Test: increase rm-datasource module test coverage

[jsbxyyx]

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increase rm-datasource module test coverage

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[DanielCoder834]

Is this issue still available?

[jsbxyyx]

@DanielCoder834 Yes, you can submit a PR

[DanielCoder834]

@jsbxyyx How do you run just the rm-datasource tests? When I run them on my local machine, there are a lot of packages that are giving me issues from other directories.