package mail

import "testing"

func TestMergeSlice(t *testing.T) {
	got := MergeSlice([]string{"a@t.com", "b@t.com"}, []string{"c@t.com"})
	if len(got) != 3 {
		t.Fatalf("MergeSlice 长度 = %d, want 3", len(got))
	}
	want := map[string]bool{"a@t.com": true, "b@t.com": true, "c@t.com": true}
	for _, s := range got {
		if !want[s] {
			t.Errorf("MergeSlice 结果包含意外元素 %q", s)
		}
	}
}

func TestMergeSliceEmpty(t *testing.T) {
	if got := MergeSlice(nil, nil); len(got) != 0 {
		t.Errorf("空输入 MergeSlice = %v, want 空", got)
	}
}