Pull request 2361: imp-test-file-names

Merge in DNS/adguard-home from imp-test-file-names to master

Squashed commit of the following:

commit a0827efdf633fba012c5eb0e0f69eaabf7629724
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Mon Mar 10 21:41:46 2025 +0300

    all: imp tests

commit 21fc274d9276ce0442572261ea39a1c018490870
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Mon Mar 10 19:40:40 2025 +0300

    all: imp test file names

internal/dhcpd/bitset_internal_test.go

@@ -0,0 +1,90 @@
+package dhcpd
+
+import (
+	"math"
+	"testing"
+	"testing/quick"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestBitSet(t *testing.T) {
+	t.Run("nil", func(t *testing.T) {
+		var s *bitSet
+
+		ok := s.isSet(0)
+		assert.False(t, ok)
+
+		assert.NotPanics(t, func() {
+			s.set(0, true)
+		})
+
+		ok = s.isSet(0)
+		assert.False(t, ok)
+
+		assert.NotPanics(t, func() {
+			s.set(0, false)
+		})
+
+		ok = s.isSet(0)
+		assert.False(t, ok)
+	})
+
+	t.Run("non_nil", func(t *testing.T) {
+		s := newBitSet()
+
+		ok := s.isSet(0)
+		assert.False(t, ok)
+
+		s.set(0, true)
+
+		ok = s.isSet(0)
+		assert.True(t, ok)
+
+		s.set(0, false)
+
+		ok = s.isSet(0)
+		assert.False(t, ok)
+	})
+
+	t.Run("non_nil_long", func(t *testing.T) {
+		s := newBitSet()
+
+		s.set(0, true)
+		s.set(math.MaxUint64, true)
+		assert.Len(t, s.words, 2)
+
+		ok := s.isSet(0)
+		assert.True(t, ok)
+
+		ok = s.isSet(math.MaxUint64)
+		assert.True(t, ok)
+	})
+
+	t.Run("compare_to_map", func(t *testing.T) {
+		m := map[uint64]struct{}{}
+		s := newBitSet()
+
+		mapFunc := func(setNew, checkOld, delOld uint64) (ok bool) {
+			m[setNew] = struct{}{}
+			delete(m, delOld)
+			_, ok = m[checkOld]
+
+			return ok
+		}
+
+		setFunc := func(setNew, checkOld, delOld uint64) (ok bool) {
+			s.set(setNew, true)
+			s.set(delOld, false)
+			ok = s.isSet(checkOld)
+
+			return ok
+		}
+
+		err := quick.CheckEqual(mapFunc, setFunc, &quick.Config{
+			MaxCount:      10_000,
+			MaxCountScale: 10,
+		})
+		assert.NoError(t, err)
+	})
+}