[🤖] Add Unit-Tests

langext/object_test.go

@@ -0,0 +1,43 @@
+package langext
+
+import (
+	"git.blackforestbytes.com/BlackForestBytes/goext/tst"
+	"testing"
+)
+
+func TestDeepCopyByJsonStruct(t *testing.T) {
+	type item struct {
+		Name string `json:"name"`
+		Age  int    `json:"age"`
+	}
+	src := item{Name: "alice", Age: 30}
+	dst, err := DeepCopyByJson(src)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	tst.AssertEqual(t, dst.Name, "alice")
+	tst.AssertEqual(t, dst.Age, 30)
+}
+
+func TestDeepCopyByJsonSlice(t *testing.T) {
+	src := []int{1, 2, 3}
+	dst, err := DeepCopyByJson(src)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	tst.AssertArrayEqual(t, dst, []int{1, 2, 3})
+
+	// Mutating the copy must not affect the source
+	dst[0] = 99
+	tst.AssertEqual(t, src[0], 1)
+}
+
+func TestDeepCopyByJsonError(t *testing.T) {
+	type bad struct {
+		C chan int
+	}
+	_, err := DeepCopyByJson(bad{C: make(chan int)})
+	if err == nil {
+		t.Errorf("expected error for un-marshalable type")
+	}
+}