A function that generates assertions against the schema of a specific object

AssertGenerator.php

<?php 

/**
 * Helper function that generates tests for the 
 * schema and data of a specific object.
 * 
 * NOTE:
 * IF THE DATA IN THE OBJECT IS WRONG, THE GENERATED
 * TESTS WILL BE WRONG.
 * It is still your responsibility to make sure your
 * tests are correct. This function only exists to
 * save you the typing. 
 * 
 * Also non-native objects are not handled correctly. 
 * Didn't bother fixing since those objects should
 * be tested separately 
 * 
 * <code>
 * $object = json_decode("{'prop':1, 'prop2': 'two', 'prop3':true, 'prop4':null }");
 * echo generateTestsForObject($object, '$object');
 * // $this->assertEquals(1, $object->prop);
 * // $this->assertEquals('two', $object->prop2)
 * // $this->assertTrue($object->prop3)
 * // $this->assertNull($object->prop4)
 * </code>
 * 
 * @param \stdClass $object     The object we are generating the tests for
 * @param string    $objectName The name of the object
 * 
 * @return string
 */
protected function generateTestsForObject($object, $objectName = '$name')
{
    $test = [];
    $test[] = '$this->assertInstanceOf(\''.get_class($object).'\', '.$objectName.');';
    foreach ($object as $prop => $value) {
        if ($value === true) {
            $test[] = '$this->assertTrue(' . $objectName . '->' . $prop . ');';
        } elseif ($value === false) {
            $test[] = '$this->assertFalse(' . $objectName . '->' . $prop . ');';
        } elseif ($value === null) {
            $test[] = '$this->assertNull(' . $objectName . '->' . $prop . ');';
        } elseif ($value instanceof \DateTime) {
            $test[] = '$this->assertInstanceOf(\'\\DateTime\', '.$objectName.'->'.$prop.');';
            $test[] = '$testDate = new \DateTime(\''.$value->format('Y-m-d H:i:s.m').'\');';
            $test[] = '$this->assertEquals($testDate->format(\'U\'), '.$objectName.'->'.$prop.'->format(\'U\'));';
        } else {
            $value = json_encode($value);
            $test[] = '$this->assertEquals(' . $value . ', ' . $objectName . '->' . $prop . ');';
        }
    }

    return implode(PHP_EOL, $test);
}