Back-port v5 fix 333e66a8e to v6, adapted to v6's DockerHostView accessors.
findMatchingDockerHost now skips an agentID/token match when
dockerHostIdentityConflicts detects a different MachineID, Swarm NodeID, or
(absent stronger IDs) hostname, so two physically different Docker nodes
that share a token+agentID are not collapsed into one host record. Adds a
regression test.
Tests for all 9 functions handling Docker host identification:
- uniqueNonEmptyStrings: dedupe with order preservation
- sanitizeDockerHostSuffix: string cleaning for IDs
- tokenHintFromRecord: redacted token hints
- dockerHostIDExists: ID existence check
- dockerHostSuffixCandidates: candidate suffix generation
- fallbackDockerHostID: hash-based ID generation
- findMatchingDockerHost: host matching by various criteria
- generateDockerHostIdentifier: unique ID generation with suffixes
- resolveDockerHostIdentifier: main resolver orchestration
86 test cases covering edge cases (nil, empty, whitespace), Unicode
handling, and complex matching scenarios.