docker images
fix #12852 Signed-off-by: Daniel Zhang <jmzwcn@gmail.com> Upstream-commit: 28ea4a63d00e9d0e28375adc80d24461193e7a28 Component: engine
Also, now that I was at it, gave them a small refactor. Docker-DCO-1.1-Signed-off-by: Francisco Carriedo <fcarriedo@gmail.com> (github: fcarriedo) Upstream-commit: 81c7d28b842844778a652b7353f52332f4276afb Component: engine
Increased coverage: * Added test cases to size_test.go * Added coverage for duration.go Docker-DCO-1.1-Signed-off-by: Francisco Carriedo <fcarriedo@gmail.com> (github: fcarriedo) Upstream-commit: c47ab1425f0cf08168af7e5561e39ff2e39625e0 Component: engine