Generate cert.

CI returns true when a non-empty CI env is present.

Flaky skips a flaky test in a CI environment.

InitDNSMock initializes dns server on udp:0 address and replaces net.DefaultResolver in order to route all dns queries within tests to this server.

LocalDialer provides a function to use to dial to localhost.

NewClient creates a http.Client with options.

NewClientLocal returns a http.Client that can connect only to localhost.

NewTransport creates a http.Transport with options.

Racy skips a racy test in a CI environment.

WithDialer sets transport.DialContext.

WithLocalDialer sets a http.Transport DialContext, which only connects to 127.0.0.1.

WithTransport sets a http.RoundTripper to a http.Client.