chore(dataservices): enhance ReadAll() so it takes predicates for filtering results BE-12016 (#866)

api/dataservices/base_test.go

@@ -0,0 +1,92 @@
+package dataservices
+
+import (
+	"strconv"
+	"testing"
+
+	portainer "github.com/portainer/portainer/api"
+	"github.com/portainer/portainer/api/slicesx"
+
+	"github.com/stretchr/testify/require"
+)
+
+type testObject struct {
+	ID    int
+	Value int
+}
+
+type mockConnection struct {
+	store map[int]testObject
+
+	portainer.Connection
+}
+
+func (m mockConnection) UpdateObject(bucket string, key []byte, value interface{}) error {
+	obj := value.(*testObject)
+
+	m.store[obj.ID] = *obj
+
+	return nil
+}
+
+func (m mockConnection) GetAll(bucketName string, obj any, appendFn func(o any) (any, error)) error {
+	for _, v := range m.store {
+		if _, err := appendFn(&v); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (m mockConnection) UpdateTx(fn func(portainer.Transaction) error) error {
+	return fn(m)
+}
+
+func (m mockConnection) ViewTx(fn func(portainer.Transaction) error) error {
+	return fn(m)
+}
+
+func (m mockConnection) ConvertToKey(v int) []byte {
+	return []byte(strconv.Itoa(v))
+}
+
+func TestReadAll(t *testing.T) {
+	service := BaseDataService[testObject, int]{
+		Bucket:     "testBucket",
+		Connection: mockConnection{store: make(map[int]testObject)},
+	}
+
+	data := []testObject{
+		{ID: 1, Value: 1},
+		{ID: 2, Value: 2},
+		{ID: 3, Value: 3},
+		{ID: 4, Value: 4},
+		{ID: 5, Value: 5},
+	}
+
+	for _, item := range data {
+		err := service.Update(item.ID, &item)
+		require.NoError(t, err)
+	}
+
+	// ReadAll without predicates
+	result, err := service.ReadAll()
+	require.NoError(t, err)
+
+	expected := append([]testObject{}, data...)
+
+	require.ElementsMatch(t, expected, result)
+
+	// ReadAll with predicates
+	hasLowID := func(obj testObject) bool { return obj.ID < 3 }
+	isEven := func(obj testObject) bool { return obj.Value%2 == 0 }
+
+	result, err = service.ReadAll(hasLowID, isEven)
+	require.NoError(t, err)
+
+	expected = slicesx.Filter(expected, hasLowID)
+	expected = slicesx.Filter(expected, isEven)
+
+	require.ElementsMatch(t, expected, result)
+}