add unit test code for FixedGenContext - Issue #104

[saeyoon17]

Hi, I wrote two unit tests regarding FixedGenContext as suggested in Issue #104.

• test_fixed_gen_context() checks the length of assignment is 1 given a single fixed column.
• test_fixed_gen_context_multiple() checks the length of assignment is 2 given two column assignments.

Please let me know if anything else is required. :)

[leolara]

@saeyoon17 I think we should test that the values are correct, not just the length

[saeyoon17]

@leolara I changed the test so that it now checks the value. Please tell me if there are any other modifications we should make. :)

[leolara]

@saeyoon17 it is approved, does it show the button to merge to you?

[saeyoon17]

@leolara No.. I think I only have the read access to this repository. This is how I see it:

[qwang98]

@leolara I think only maintainers are allowed to merge it. Any means we can change this in the repo settings?