add testcase for decodeText module #445

Job	Run time
test / Dependency Review	8s
test / Check Licenses	19s
test / Test (14, macos-latest)	40s
test / Lint Code	0s
test / Test Fastify Integration	0s
test / Test (14, ubuntu-latest)	24s
test / Test (16, macos-latest)	50s
test / Test (16, ubuntu-latest)	19s
test / Test (16, windows-latest)	1m 9s
test / Test (18, macos-latest)	45s
test / Test (18, ubuntu-latest)	21s
test / Test (18, windows-latest)	1m 2s
test / Test (20, macos-latest)	30s
test / Test (20, ubuntu-latest)	19s
test / Test (20, windows-latest)	1m 14s
test / Test (21, macos-latest)	46s
test / Test (21, ubuntu-latest)	20s
test / Test (21, windows-latest)	44s
test / Automerge Dependabot PRs	0s
	9m 50s

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