public function testIncValue() { $variable = new Variable('a', 1, CompiledExpression::INTEGER); static::assertSame(1, $variable->getValue()); $variable->inc(); static::assertSame(2, $variable->getValue()); $variable->inc(); static::assertSame(3, $variable->getValue()); $variable->inc(); $variable->inc(); static::assertSame(5, $variable->getValue()); }