initial commit. Cloned timetracker repository

app/utils/mapper/mapper_test.go

@@ -0,0 +1,78 @@
+package mapper_test
+
+import (
+	"testing"
+
+	"git.ma-al.com/goc_marek/timetracker/app/utils/mapper"
+)
+
+// --- example structs ---
+
+type UserInput struct {
+	Name  string
+	Email string
+	Age   int
+}
+
+type UserRecord struct {
+	Name      string
+	Email     string
+	Age       int
+	CreatedAt string // not in src → stays ""
+	Active    bool   // not in src → stays false
+}
+
+// --- tests ---
+
+func TestMap_MatchingFields(t *testing.T) {
+	src := &UserInput{Name: "Alice", Email: "alice@example.com", Age: 30}
+	dst := &UserRecord{}
+
+	if err := mapper.Map(dst, src); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+
+	if dst.Name != "Alice" {
+		t.Errorf("Name: want Alice, got %s", dst.Name)
+	}
+	if dst.Email != "alice@example.com" {
+		t.Errorf("Email: want alice@example.com, got %s", dst.Email)
+	}
+	if dst.Age != 30 {
+		t.Errorf("Age: want 30, got %d", dst.Age)
+	}
+}
+
+func TestMap_UnmatchedFieldsAreZero(t *testing.T) {
+	src := &UserInput{Name: "Bob"}
+	dst := &UserRecord{}
+
+	mapper.MustMap(dst, src)
+
+	if dst.CreatedAt != "" {
+		t.Errorf("CreatedAt: expected empty string, got %q", dst.CreatedAt)
+	}
+	if dst.Active != false {
+		t.Errorf("Active: expected false, got %v", dst.Active)
+	}
+}
+
+func TestMap_TypeConversion(t *testing.T) {
+	type Src struct{ Score int32 }
+	type Dst struct{ Score int64 }
+
+	src := &Src{Score: 99}
+	dst := &Dst{}
+
+	mapper.MustMap(dst, src)
+
+	if dst.Score != 99 {
+		t.Errorf("Score: want 99, got %d", dst.Score)
+	}
+}
+
+func TestMap_InvalidInput(t *testing.T) {
+	if err := mapper.Map("not a struct", 42); err == nil {
+		t.Error("expected error for non-struct inputs")
+	}
+}