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test: create test harness with locked environment #59

Merged
merged 4 commits into from
Dec 20, 2022
Merged

test: create test harness with locked environment #59

merged 4 commits into from
Dec 20, 2022

Commits on Dec 19, 2022

  1. test: create test harness with locked environment 

    Setup single-process integration testing with a utility module. Designed
so multiple tests can be run without the need for separate processes.
In practice, this means new tests will not need a new file. It allows
for easily repeating checks across similar functions e.g. `dotenv()` and
`from_filename(".env")`.

The heart of the utility module is the `TestEnv` struct which enables
controlled setup of a temporary testing environment. When using the
`test_in_env` functions, access to the process' environment is
effectively locked using a mutex, reset, and then the `TestEnv` is
created.

Also included:

- a set of default keys and values
- valid and invalid default envfile contents
- assertions with contextual output when tests fail
    @sonro
    sonro committed Dec 19, 2022
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  2. test: fix format! args for rust 1.56.1

    @sonro
    sonro committed Dec 19, 2022
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  3. test: handle NotUnicode in harness asserts

    @sonro
    sonro committed Dec 19, 2022
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  4. test: add more comments to harness functions

    @sonro
    sonro committed Dec 19, 2022
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