public function testCompareKeysHasRightReturn() { $array1 = array("key1" => "val1", "key2" => "val2"); $array2 = array("key1" => "val1", "key2" => "val2"); $this->assertEmpty($this->stub->compareKeys($array1, $array2)); $array1 = array("key1" => "val", "key2" => "val2"); $this->assertContains("different_values", $this->stub->compareKeys($array1, $array2)); $array1 = array("key2" => "val2"); $this->assertContains("absent_from_array1", $this->stub->compareKeys($array1, $array2)); $array1 = array("key1" => "val1", "key2" => "val2"); $array2 = array("key1" => "val1"); $this->assertContains("absent_from_array2", $this->stub->compareKeys($array1, $array2)); }