tests(rpc): Add wallet grpc tests

[oxarbitrage]

Motivation

We want to test all the possible calls a wallet connected to a lightwalletd server can possible do.

Close #3655

Solution

This PR add very basic tests that could be extended for a series of rpc methods a wallet connected to lightwalletd can possible call.

There are a few tests that are depending on merging additional code to main.

Review

I am looking some feedback in regards to the tests. Should we make more complicated stuff now or try to merge this code and open additional smaller issues to complete what we want ?

Any ideas to implement in this PR ?

I think @teor2345 and/or @conradoplg are good candidates to take a look.

Reviewer Checklist

• Code implements Specs and Designs
• Tests for Expected Behaviour
• Tests for Errors

[oxarbitrage]

FYI here is how i am running this test locally:

export ZEBRA_CACHED_STATE_DIR="/media/oxarbitrage/4eb53770-4e4f-4d80-a830-0914f3f5b89a/chain/zebra"
export LIGHTWALLETD_DATA_DIR="/home/oxarbitrage/zebra/issue3655/lightwalletd"
export ZEBRA_TEST_LIGHTWALLETD="true"
export RUST_LOG="info"

cargo test -- --nocapture lightwalletd_wallet_grpc_tests

[conradoplg]

I think this looks good so far, and makes sense to leave the simpler tests and add more complicated tests later.

I'm not sure about how we're handling the tests that require some state. I think some of them have #[ignore] so that they are only run explicitly (even if this runs only with ZEBRA_TEST_LIGHTWALLETD). I need to check the current state of the other tests, though.

I can resume taking a closer look at this PR tomorrow.

[teor2345]

Looks like a great test, I just have a few suggestions for making it more reliable.

[teor2345]

@Mergifyio update

[mergify]

update

✅ Branch has been successfully updated

[teor2345]

The code looks good, but we need the latest CI fixes to make the tests run reliably.

[teor2345]

Looks like all the tests passed!