[🤖] Add Unit-Tests

mongoext/registry_test.go

@@ -0,0 +1,79 @@
+package mongoext
+
+import (
+	"bytes"
+	"testing"
+
+	"git.blackforestbytes.com/BlackForestBytes/goext/tst"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+func TestCreateGoExtBsonRegistryNotNil(t *testing.T) {
+	reg := CreateGoExtBsonRegistry()
+	if reg == nil {
+		t.Fatal("registry should not be nil")
+	}
+}
+
+func TestCreateGoExtBsonRegistryEmbeddedDocumentDecodesAsBsonM(t *testing.T) {
+	reg := CreateGoExtBsonRegistry()
+
+	doc := bson.M{
+		"name": "alice",
+		"nested": bson.M{
+			"key": "value",
+			"num": int32(42),
+		},
+	}
+
+	raw, err := bson.Marshal(doc)
+	tst.AssertNoErr(t, err)
+
+	dec := bson.NewDecoder(bson.NewDocumentReader(bytes.NewReader(raw)))
+	dec.SetRegistry(reg)
+
+	var decoded map[string]any
+	err = dec.Decode(&decoded)
+	tst.AssertNoErr(t, err)
+
+	nested, ok := decoded["nested"].(bson.M)
+	if !ok {
+		t.Fatalf("expected nested to be bson.M, got %T", decoded["nested"])
+	}
+
+	tst.AssertEqual(t, nested["key"].(string), "value")
+}
+
+func TestCreateGoExtBsonRegistryStructFieldOfTypeAny(t *testing.T) {
+	reg := CreateGoExtBsonRegistry()
+
+	type wrapper struct {
+		Payload any `bson:"payload"`
+	}
+
+	source := wrapper{Payload: bson.M{"x": "y"}}
+	raw, err := bson.Marshal(source)
+	tst.AssertNoErr(t, err)
+
+	dec := bson.NewDecoder(bson.NewDocumentReader(bytes.NewReader(raw)))
+	dec.SetRegistry(reg)
+
+	var decoded wrapper
+	err = dec.Decode(&decoded)
+	tst.AssertNoErr(t, err)
+
+	payload, ok := decoded.Payload.(bson.M)
+	if !ok {
+		t.Fatalf("expected Payload to be bson.M, got %T", decoded.Payload)
+	}
+	tst.AssertEqual(t, payload["x"].(string), "y")
+}
+
+func TestCreateGoExtBsonRegistryReturnsIndependentInstances(t *testing.T) {
+	r1 := CreateGoExtBsonRegistry()
+	r2 := CreateGoExtBsonRegistry()
+
+	if r1 == r2 {
+		t.Error("expected each call to return a new registry instance")
+	}
+}