Unit Tests for Fund ValidateBasic and Drip function

[Josumner]

No description provided.

[codecov-commenter]

Codecov Report

Merging #100 (adaedf0) into master (73de69d) will decrease coverage by 0.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #100      +/-   ##
==========================================
- Coverage   62.99%   62.93%   -0.07%     
==========================================
  Files         626      631       +5     
  Lines       41425    41472      +47     
==========================================
+ Hits        26097    26100       +3     
- Misses      12929    12974      +45     
+ Partials     2399     2398       -1     

Impacted Files	Coverage Δ
x/staking/keeper/test_common.go
x/auth/vesting/types/test_common.go
x/airdrop/types/msgs.go	45.83% <0.00%> (ø)
x/airdrop/types/querier.go	0.00% <0.00%> (ø)
x/airdrop/types/codec.go	0.00% <0.00%> (ø)
x/airdrop/types/params.go	0.00% <0.00%> (ø)
x/airdrop/types/genesis.go	0.00% <0.00%> (ø)
x/airdrop/types/airdrop.go	86.66% <0.00%> (ø)
x/airdrop/types/keys.go	0.00% <0.00%> (ø)

[daeMOn63]

LGTM! Using table-driven tests here would have made it a bit more goish (and easier to maintain/extend in the long run) but that'll be fine for now 👍 Give it a try for the next ones!