package packer import ( "os/exec" "testing" ) func TestBuilder_NoExist(t *testing.T) { c := NewClient(&PluginClientConfig{Cmd: exec.Command("i-should-not-exist")}) defer c.Kill() _, err := c.Builder() if err == nil { t.Fatal("should have error") } } func TestBuilder_Good(t *testing.T) { c := NewClient(&PluginClientConfig{Cmd: helperProcess("builder")}) defer c.Kill() _, err := c.Builder() if err != nil { t.Fatalf("should not have error: %s", err) } }