Refactor and improve tests

[0xripleys]

No description provided.

[codecov-commenter]

Codecov Report

Merging #121 (d6cfbca) into upcoming (8594030) will increase coverage by 0.82%.
The diff coverage is 98.35%.

@@             Coverage Diff              @@
##           upcoming     #121      +/-   ##
============================================
+ Coverage     79.12%   79.94%   +0.82%     
============================================
  Files            36       40       +4     
  Lines          9006    12712    +3706     
============================================
+ Hits           7126    10163    +3037     
- Misses         1880     2549     +669     

Impacted Files	Coverage Δ
token-lending/cli/src/main.rs	0.06% <0.00%> (-0.07%)	⬇️
token-lending/program/tests/helpers/genesis.rs	0.00% <0.00%> (ø)
token-lending/sdk/src/instruction.rs	98.13% <0.00%> (+7.80%)	⬆️
...lending/program/tests/redeem_reserve_collateral.rs	95.60% <95.34%> (-2.61%)	⬇️
...lending/program/tests/deposit_reserve_liquidity.rs	96.52% <96.33%> (-3.48%)	⬇️
...nding/program/tests/helpers/solend_program_test.rs	96.60% <96.60%> (ø)
token-lending/program/tests/helpers/mock_pyth.rs	96.83% <96.83%> (ø)
...ing/program/tests/deposit_obligation_collateral.rs	97.61% <97.36%> (-0.94%)	⬇️
...sit_reserve_liquidity_and_obligation_collateral.rs	98.03% <97.93%> (-1.97%)	⬇️
...nding/program/tests/borrow_obligation_liquidity.rs	98.44% <98.23%> (+0.03%)	⬆️
... and 54 more

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