test: improve readability via hash item helper fn

[mvidner]

Problem

As I was reviewing #1716 I noticed it was touching some repetitive code to set up test data

Solution

Don't bury the actual test data among so much boilerplate. Diff: +85 -236

Testing

cargo test continues to work :heavy_check_mark:

Screenshots

N/A

[coveralls]

Pull Request Test Coverage Report for Build 11719336256

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 71.429%

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Totals
Change from base Build 11712167262:	0.0%
Covered Lines:	16895
Relevant Lines:	23653

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💛 - Coveralls