feat: added test for claiming rewards on 0 deposit gauge

[lilPlumberBoy]

Describe your changes

Checklist before requesting a review

• Title follows conventional commits style
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works
• Newly added functions follow Check-effects-interaction
• Gas usage has been minimized (ex. Storage variable access is minimized)

[github-actions]

Slither report

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Summary

[github-actions]

Changes to gas cost

Generated at commit: 239807507273a3d81a45f0a15841804f0a10c0e1, compared to commit: ad94bf05f570ab421122db1e6391caa4739fe297

🧾 Summary (10% most significant diffs)

Contract	Method	Avg (+/-)	%
ERC20RewardsGauge	deposit	+856 ❌	+0.89%

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Full diff report 👇

Contract	Deployment Cost (+/-)	Method	Min (+/-)	%	Avg (+/-)	%	Median (+/-)	%	Max (+/-)	%	# Calls (+/-)
ERC20RewardsGauge	3,604,944 (0)	addReward claimRewards deposit depositRewardToken getRewardData grantRole initialize renounceRole	3,053 (0) 5,685 (0) 2,755 (0) 7,707 (0) 1,664 (0) 72,558 (0) 2,992 (0) 5,206 (0)	0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%	67,575 (+277) 152,733 (-1,753) 97,357 (+856) 148,411 (-57) 3,032 (-39) 72,898 (+8) 313,885 (+165) 6,426 (+33)	+0.41% -1.13% +0.89% -0.04% -1.27% +0.01% +0.05% +0.52%	73,470 (0) 100,941 (0) 93,699 (+14,310) 147,383 (0) 1,664 (0) 72,558 (0) 449,126 (0) 5,206 (0)	0.00% 0.00% +18.03% 0.00% 0.00% 0.00% 0.00% 0.00%	73,470 (0) 923,524 (0) 216,659 (0) 195,467 (0) 11,664 (0) 79,358 (0) 543,836 (0) 34,206 (0)	0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%	5,705 (+256) 4,097 (+256) 5,122 (+256) 4,866 (+256) 5,398 (+512) 1,677 (+2) 837 (+1) 1,663 (+2)
YearnStakingDelegate	3,689,914 (0)	execute	27,929 (0)	0.00%	136,787 (+73)	+0.05%	149,225 (0)	0.00%	149,609 (0)	0.00%	268 (0)
CoveToken	3,495,457 (0)	addAllowedReceiver mint removeAllowedSender	26,282 (0) 26,613 (0) 31,020 (0)	0.00% 0.00% 0.00%	50,931 (-1) 67,129 (-1) 42,439 (-1)	-0.00% -0.00% -0.00%	55,323 (0) 75,549 (0) 31,248 (0)	0.00% 0.00% 0.00%	55,335 (0) 98,393 (0) 53,829 (0)	0.00% 0.00% 0.00%	1,793 (0) 1,537 (0) 513 (0)
MasterRegistry	1,462,573 (0)	multicall	173,014 (0)	0.00%	176,528 (+1)	+0.00%	176,386 (+6)	+0.00%	179,746 (0)	0.00%	512 (0)
YearnGaugeStrategy	1,817,865 (0)	report	58,515 (0)	0.00%	303,088 (-1)	-0.00%	69,644 (0)	0.00%	914,862 (0)	0.00%	5,890 (0)