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// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org>
package main
import (
"testing"
)
func TestValidateBitZeros(t *testing.T) {
tests := []struct {
name string
bs []byte
n uint
expected bool
}{
{
name: "First 8 bits are zeros",
bs: []byte{0x00, 0x01},
n: 8,
expected: true,
},
{
name: "First 8 bits are not all zeros",
bs: []byte{0x01, 0x00},
n: 8,
expected: false,
},
{
name: "First 16 bits are zeros",
bs: []byte{0x00, 0x00, 0x01},
n: 16,
expected: true,
},
{
name: "First 16 bits are not all zeros",
bs: []byte{0x01, 0x00, 0x00},
n: 16,
expected: false,
},
{
name: "First 9 bits are zeros",
bs: []byte{0x00, 0x01},
n: 9,
expected: true,
},
{
name: "First 9 bits are not all zeros",
bs: []byte{0x01, 0x01},
n: 9,
expected: false,
},
{
name: "First 10 bits are zeros",
bs: []byte{0x00, 0x20},
n: 10,
expected: true,
},
{
name: "First 10 bits are not all zeros",
bs: []byte{0x00, 0x40},
n: 10,
expected: false,
},
{
name: "First 24 bits are zeros",
bs: []byte{0x00, 0x00, 0x00, 0x01},
n: 24,
expected: true,
},
{
name: "First 24 bits are not all zeros",
bs: []byte{0x00, 0x01, 0x00, 0x00},
n: 24,
expected: false,
},
{
name: "Checking zero bits",
bs: []byte{0xFF, 0xFF},
n: 0,
expected: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := validateBitZeros(tt.bs, tt.n)
if got != tt.expected {
t.Errorf("validateBitZeros(%v, %v) = %v; want %v", tt.bs, tt.n, got, tt.expected)
}
})
}
}
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