Tests for 1D and Mixture cases.

[GearsAD]

There are not integration tests for these cases and there should be some before we tag this release.

[GearsAD]

REF: https://github.com/NavAbility/NavAbilitySDK.py/blob/main/tests/conftest.py#L82-L140

[dehann]

I'm going to update the commented 1D graph sectionin in test/integration/fixtures.jl to clear this.

What I'm going to recommend medium term, is that we build one test harness repo for the SDKs, using the pre-existing standardized API as best we can, and then use that as an upstream repo for CI on all the SDKs. That way, if we change something in the test, then all the SDKs will see the change and we can fix accordingly.

Think this issue could benefit from the test harness repo too:

• Refactor integration tests into scenarios (e.g. 1D, 2D, etc.) so we can leverage representative cases for testing. #81