go test -coverprofile=coverage.out
go tool cover -html=coverage.out
(CommandList
  children: [
    (C {(go)} {(test)} {(-coverprofile) (Lit_Other "=") (coverage.out)})
    (C {(go)} {(tool)} {(cover)} {(-html) (Lit_Other "=") (coverage.out)})
  ]
)