package selfupdate

import "testing"

// decision 56 (R-745): the controller's previous image comes from the swap record only when that record is a
// SUCCESS that ended on the running version. COMPANION RED-PROOF: drop the Status check → the failed-swap row fails.
func TestRecordedPrevious(t *testing.T) {
	ok := &UpdateState{Status: "success", PreviousVersion: "0.284.2", PreviousImage: "r:0.284.2", TargetVersion: "0.285.0"}
	cases := []struct {
		name    string
		st      *UpdateState
		running string
		want    string
	}{
		{"success onto the running version", ok, "0.285.0", "r:0.284.2"},
		{"no record", nil, "0.285.0", ""},
		{"the record is about another version", ok, "0.286.0", ""},
		{"a failed swap (rolled back: the box runs the 'previous')", &UpdateState{Status: "failed", PreviousVersion: "0.284.2", PreviousImage: "r:0.284.2", TargetVersion: "0.285.0"}, "0.285.0", ""},
		{"pending", &UpdateState{Status: "pending", PreviousImage: "r:0.284.2", TargetVersion: "0.285.0"}, "0.285.0", ""},
	}
	for _, c := range cases {
		if got := c.st.RecordedPrevious(c.running); got != c.want {
			t.Errorf("%s: got %q, want %q", c.name, got, c.want)
		}
	}
}