Add search history

Add search history for filterable and searchable views.

pkg/utils/history_buffer_test.go

@@ -0,0 +1,64 @@
+package utils
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewHistoryBuffer(t *testing.T) {
+	hb := NewHistoryBuffer[int](5)
+	assert.NotNil(t, hb)
+	assert.Equal(t, 5, hb.maxSize)
+	assert.Equal(t, 0, len(hb.items))
+}
+
+func TestPush(t *testing.T) {
+	hb := NewHistoryBuffer[int](3)
+	hb.Push(1)
+	hb.Push(2)
+	hb.Push(3)
+	hb.Push(4)
+
+	assert.Equal(t, 3, len(hb.items))
+	assert.Equal(t, []int{4, 3, 2}, hb.items)
+}
+
+func TestPeekAt(t *testing.T) {
+	hb := NewHistoryBuffer[int](3)
+	hb.Push(1)
+	hb.Push(2)
+	hb.Push(3)
+
+	item, err := hb.PeekAt(0)
+	assert.Nil(t, err)
+	assert.Equal(t, 3, item)
+
+	item, err = hb.PeekAt(1)
+	assert.Nil(t, err)
+	assert.Equal(t, 2, item)
+
+	item, err = hb.PeekAt(2)
+	assert.Nil(t, err)
+	assert.Equal(t, 1, item)
+
+	item, err = hb.PeekAt(-1)
+	assert.Nil(t, err)
+	assert.Equal(t, 0, item)
+
+	_, err = hb.PeekAt(3)
+	assert.NotNil(t, err)
+	assert.Equal(t, "Index out of range", err.Error())
+
+	_, err = hb.PeekAt(-2)
+	assert.NotNil(t, err)
+	assert.Equal(t, "Index out of range", err.Error())
+}
+
+func TestPeekAtEmptyBuffer(t *testing.T) {
+	hb := NewHistoryBuffer[int](3)
+
+	_, err := hb.PeekAt(0)
+	assert.NotNil(t, err)
+	assert.Equal(t, "Buffer is empty", err.Error())
+}