test: dot: test transfer extrinsic

[arijitAD]

Changes

• Add TestPendingExtrinsic

Tests

Checklist

• I have read CODE_OF_CONDUCT and CONTRIBUTING
• I have provided as much information as possible and necessary
• I have reviewed my own pull request before requesting a review
• All integration tests and required coverage checks are passing

Issues

• closes Transaction Network Test: transfer #823

[codecov]

Codecov Report

Merging #1448 (7833e77) into development (09df0c3) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@               Coverage Diff               @@
##           development    #1448      +/-   ##
===============================================
- Coverage        58.61%   58.61%   -0.01%     
===============================================
  Files              151      151              
  Lines            15060    15057       -3     
===============================================
- Hits              8828     8826       -2     
- Misses            4694     4695       +1     
+ Partials          1538     1536       -2     

Flag	Coverage Δ
unit-tests	58.61% <100.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
lib/grandpa/grandpa.go	64.27% <ø> (ø)
dot/rpc/modules/author.go	71.42% <100.00%> (+2.53%)	⬆️
dot/network/notifications.go	53.84% <0.00%> (-9.62%)	⬇️
lib/blocktree/leaves.go	90.24% <0.00%> (-4.88%)	⬇️
dot/network/host.go	72.97% <0.00%> (+1.35%)	⬆️
dot/network/service.go	62.65% <0.00%> (+1.58%)	⬆️
dot/state/block_notify.go	85.18% <0.00%> (+1.85%)	⬆️
dot/network/utils.go	61.53% <0.00%> (+2.88%)	⬆️

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[noot]

looks good! we should open a follow up issue that ensures a transaction sent to a non-authority node is able to add the tx to the pool and gossip it (right now it seems to fail on validation)