package imagegen

import "testing"

func TestEditRequestApply(t *testing.T) {
	base := EditRequest{Prompt: "make it night", Init: Image{MIME: "image/png", Data: []byte{1}}}
	got := base.Apply(WithEditStrength(0.7), WithEditN(2), WithEditSeed(42))

	if got.Prompt != "make it night" || len(got.Init.Data) != 1 {
		t.Errorf("got = %+v", got)
	}
	if got.Strength == nil || *got.Strength != 0.7 {
		t.Errorf("Strength = %v, want 0.7", got.Strength)
	}
	if got.N != 2 {
		t.Errorf("N = %d, want 2", got.N)
	}
	if got.Seed == nil || *got.Seed != 42 {
		t.Errorf("Seed = %v, want 42", got.Seed)
	}

	// Apply must not mutate the receiver (options apply to a copy).
	if base.Strength != nil || base.N != 0 || base.Seed != nil {
		t.Errorf("base mutated: %+v", base)
	}
}