chore: add various tests

pkg/ptr/ptr_test.go

@@ -0,0 +1,73 @@
+package ptr
+
+import (
+	"testing"
+)
+
+func TestOf(t *testing.T) {
+	// Test with different types
+	intVal := 42
+	intPtr := Of(intVal)
+	if *intPtr != intVal {
+		t.Errorf("Expected %d, got %d", intVal, *intPtr)
+	}
+
+	stringVal := "hello"
+	stringPtr := Of(stringVal)
+	if *stringPtr != stringVal {
+		t.Errorf("Expected %s, got %s", stringVal, *stringPtr)
+	}
+
+	floatVal := 3.14
+	floatPtr := Of(floatVal)
+	if *floatPtr != floatVal {
+		t.Errorf("Expected %f, got %f", floatVal, *floatPtr)
+	}
+}
+
+func TestDeref(t *testing.T) {
+	// Test with non-nil pointer
+	intVal := 42
+	intPtr := Of(intVal)
+	result := Deref(intPtr)
+	if result != intVal {
+		t.Errorf("Expected %d, got %d", intVal, result)
+	}
+
+	// Test with nil pointer
+	var nilPtr *int
+	result = Deref(nilPtr)
+	if result != 0 {
+		t.Errorf("Expected 0, got %d", result)
+	}
+
+	// Test with string
+	stringVal := "hello"
+	stringPtr := Of(stringVal)
+	resultStr := Deref(stringPtr)
+	if resultStr != stringVal {
+		t.Errorf("Expected %s, got %s", stringVal, resultStr)
+	}
+
+	// Test with nil string pointer
+	var nilStrPtr *string
+	resultStr = Deref(nilStrPtr)
+	if resultStr != "" {
+		t.Errorf("Expected empty string, got %s", resultStr)
+	}
+}
+
+func TestDerefZeroValue(t *testing.T) {
+	// Test that Deref returns zero value for nil pointers
+	var nilInt *int
+	result := Deref(nilInt)
+	if result != 0 {
+		t.Errorf("Expected zero int, got %d", result)
+	}
+
+	var nilString *string
+	resultStr := Deref(nilString)
+	if resultStr != "" {
+		t.Errorf("Expected zero string, got %s", resultStr)
+	}
+}