unit tests: add coverage for unset #782

	name: "CodeQL"

	on:
	push:
	branches: [ "main" ]
	pull_request:
	branches: [ "main" ]
	# Ignore changes to common non-code files.
	paths-ignore:
	- '*/.md'
	- '*/.rst'
	- '*/.txt'
	- '*/.yml'
	- '*/.yaml'
	- '*/.json'
	- '*/.ini'
	- '*/.env'
	schedule:
	- cron: '25 6 * * 3'

	jobs:
	analyze:
	name: Analyze
	runs-on: ubuntu-latest
	permissions:
	actions: read
	contents: read
	security-events: write

	steps:
	- name: Checkout code
	uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7

	# Initializes the CodeQL tools for scanning.
	- name: Initialize CodeQL
	uses: github/codeql-action/init@4dd16135b69a43b6c8efb853346f8437d92d3c93 # v3.26.6
	with:
	languages: go
	# xref: https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-code-scanning#using-queries-in-ql-packs
	# xref: https://codeql.github.com/codeql-query-help/go/
	queries: security-and-quality

	# Build the project, and run CodeQL analysis.
	# We do not make use of autobuild as this would run the first Make
	# target, which includes a lot more than just the Go files we want to
	# scan.
	- name: Build
	run: make install

	- name: Perform CodeQL Analysis
	uses: github/codeql-action/analyze@4dd16135b69a43b6c8efb853346f8437d92d3c93 # v3.26.6
	with:
	category: "/language:go"

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