Add unit tests for uploadPayload
#8020
| Job | Run time |
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| 4m 49s | |
| 11m 4s | |
| 4m 33s | |
| 4m 42s | |
| 4m 10s | |
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| 4m 34s | |
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| 11m 15s | |
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| 13m 36s | |
| 4m 13s | |
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| 13m 37s | |
| 13m 42s | |
| 4m 19s | |
| 4m 22s | |
| 4m 19s | |
| 2h 32m 49s |