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test(tvix/cli): Make the REPL testable

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Juggle around the internals of the tvix-cli crate so that we expose the
Repl as a public type with a `send` method, that sends a string to the
repl and *captures all output* so that it can be subsequently asserted
on in tests. Then, demonstrate that this works with a single (for now)
REPL test using expect-test to assert on the output of a single command
sent to the REPL.

As the REPL gets more complicated, this will allow us to make tests that
cover that complex behavior.

Change-Id: I88175bd72d8760c79faade95ebb1d956f08a7b83
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11958
Autosubmit: aspen <root@gws.fyi>
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
This commit is contained in:
Aspen Smith 2024-07-06 09:00:46 -04:00 • committed by clbot
parent 3a79f93795
commit 0ad986169d
9 changed files with 522 additions and 346 deletions
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3
tvix/cli/Cargo.toml
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@ -30,6 +30,9 @@ tracing-indicatif = "0.3.6"
[dependencies.wu-manber]
git = "https://github.com/tvlfyi/wu-manber.git"
[dev-dependencies]
expect-test = "1.5.0"
[target.'cfg(not(target_env = "msvc"))'.dependencies]
tikv-jemallocator = "0.5"