DockerCLI/vendor/gotest.tools/poll/check.go

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package poll
import (
"net"
"os"
)
// Check is a function which will be used as check for the WaitOn method.
type Check func(t LogT) Result
// FileExists looks on filesystem and check that path exists.
func FileExists(path string) Check {
return func(t LogT) Result {
_, err := os.Stat(path)
if os.IsNotExist(err) {
t.Logf("waiting on file %s to exist", path)
return Continue("file %s does not exist", path)
}
if err != nil {
return Error(err)
}
return Success()
}
}
// Connection try to open a connection to the address on the
// named network. See net.Dial for a description of the network and
// address parameters.
func Connection(network, address string) Check {
return func(t LogT) Result {
_, err := net.Dial(network, address)
if err != nil {
t.Logf("waiting on socket %s://%s to be available...", network, address)
return Continue("socket %s://%s not available", network, address)
}
return Success()
}
}