package handler

import "testing"

// TestFormatBytes 校验后台「图集原图总大小」的字节格式化（0/负数为「—」）。
func TestFormatBytes(t *testing.T) {
	cases := []struct {
		n    int64
		want string
	}{
		{0, "—"},
		{-1, "—"},
		{500, "500 B"},
		{1024, "1.0 KB"},
		{1536, "1.5 KB"},
		{1024 * 1024, "1.0 MB"},
		{int64(1.5 * 1024 * 1024), "1.5 MB"},
		{int64(1.5 * 1024 * 1024 * 1024), "1.5 GB"},
	}
	for _, c := range cases {
		if got := formatBytes(c.n); got != c.want {
			t.Errorf("formatBytes(%d) = %q, want %q", c.n, got, c.want)
		}
	}
}