DibiObject: fixed compatibility with PHP 7

tests/dibi/DibiObject.phpt

@@ -0,0 +1,70 @@
+<?php
+
+use Tester\Assert;
+
+require __DIR__ . '/bootstrap.php';
+
+
+class TestClass extends DibiObject
+{
+	public function getBar()
+	{
+		return 123;
+	}
+
+	public function isFoo()
+	{
+		return 456;
+	}
+}
+
+
+// calling
+Assert::exception(function () {
+	$obj = new TestClass;
+	$obj->undeclared();
+}, 'LogicException', 'Call to undefined method TestClass::undeclared().');
+
+Assert::exception(function () {
+	TestClass::undeclared();
+}, 'LogicException', 'Call to undefined static method TestClass::undeclared().');
+
+
+// writing
+Assert::exception(function () {
+	$obj = new TestClass;
+	$obj->undeclared = 'value';
+}, 'LogicException', 'Cannot assign to an undeclared property TestClass::$undeclared.');
+
+
+// property getter
+$obj = new TestClass;
+Assert::true(isset($obj->bar));
+Assert::same(123, $obj->bar);
+Assert::false(isset($obj->foo));
+Assert::same(456, $obj->foo);
+
+
+// reading
+Assert::exception(function () {
+	$obj = new TestClass;
+	$val = $obj->undeclared;
+}, 'LogicException', 'Cannot read an undeclared property TestClass::$undeclared.');
+
+
+// unset/isset
+Assert::exception(function () {
+	$obj = new TestClass;
+	unset($obj->undeclared);
+}, 'LogicException', 'Cannot unset the property TestClass::$undeclared.');
+
+Assert::false(isset($obj->undeclared));
+
+
+// extension method
+TestClass::extensionMethod('join', $func = function (TestClass $that, $separator) {
+	return $that->foo . $separator . $that->bar;
+});
+
+$obj = new TestClass;
+Assert::same('456*123', $obj->join('*'));