Implement MetadataClient

[fjogeleit]

Signed-off-by: Frank Jogeleit [email protected]

[coveralls]

Pull Request Test Coverage Report for Build 4125361158

• 250 of 274 (91.24%) changed or added relevant lines in 17 files are covered.
• 6 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.09%) to 93.551%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/listener/metrics/result_custom.go	16	17	94.12%
pkg/config/resolver.go	29	31	93.55%
pkg/kubernetes/policy_report_client.go	25	27	92.59%
pkg/listener/metrics/cache.go	43	47	91.49%
pkg/kubernetes/queue.go	76	91	83.52%

Files with Coverage Reduction	New Missed Lines	%
pkg/config/resolver.go	2	98.46%
pkg/sqlite3/store.go	4	86.19%

Totals
Change from base Build 4125322268:	-0.09%
Covered Lines:	4004
Relevant Lines:	4280

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💛 - Coveralls

[sonatype-lift]

typecheck: invalid operation: cannot compare r.cache != nil (operator != not defined on untyped nil)

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