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Microservices teams often wrestle with unreliable integration tests, impeding progress. Enter shadow testing—a savvy tactic where new services trot alongside current versions, processing the same traffic for a head-to-head comparison. This artful technique harnesses real-world validation without bothering users and catches snags early. Shadow testing trumps canary releases and feature flags by sparing users and paving the way for early-stage testing. Tools like Diffy elevate this approach, scrutinizing responses for spot-on regression detection. Solutions like Signadot weave shadow tests into CI/CD pipelines, especially tailored for Kubernetes-based workflows.
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