public function testUniqueArgumentsAccessors()
{
$email = new SendGrid\Email();
$unique_arguments = array("sub_1" => array("val_1.1", "val_1.2", "val_1.3"), "sub_2" => array("val_2.1", "val_2.2"), "sub_3" => array("val_3.1", "val_3.2", "val_3.3", "val_3.4"), "sub_4" => array("val_4.1", "val_4.2", "val_4.3"));
$email->setUniqueArguments($unique_arguments);
$header = $email->getSmtpapiHeaders();
$this->assertEquals($unique_arguments, $header['unique_args']);
$this->assertEquals("{\"unique_args\":{\"sub_1\":[\"val_1.1\",\"val_1.2\",\"val_1.3\"],\"sub_2\":[\"val_2.1\",\"val_2.2\"],\"sub_3\":[\"val_3.1\",\"val_3.2\",\"val_3.3\",\"val_3.4\"],\"sub_4\":[\"val_4.1\",\"val_4.2\",\"val_4.3\"]}}", $email->getSmtpapiHeadersJson());
// ensure that addSubstitution appends to the list of substitutions
$unique_vals = array("val_5.1", "val_5.2", "val_5.3", "val_5.4");
$email->addUniqueArgument("sub_5", $unique_vals);
$unique_arguments["sub_5"] = $unique_vals;
$header = $email->getSmtpapiHeaders();
$this->assertEquals(5, count($header['unique_args']));
$this->assertEquals($unique_arguments, $header['unique_args']);
}
