Update Payment Test

update-payment-test.php

<?php
public function test_update_payment_amount() {
	$pre_update_total_earnings = get_option( 'edd_earnings_total' );
	$pre_update_payment_amount = edd_sanitize_amount( edd_get_payment_amount( $this->_payment_id ) );

	$payment_download = array(
			'id'       => $this->_post->ID,
			'price_id' => '1',
			'amount'   =>  '100',
			'quantity' => '1'
		);

	$user = get_userdata(1);

	$payment_address = array(
		'line1'   => '',
		'line2'   => '',
		'city'    => '',
		'zip'     => '',
		'country' => '0',
		'state'   => ''
	);

	$data = array(
		'edd_action'                    => 'update_payment_details',
		'edd_payment_id'                => $this->_payment_id,
		'edd-payment-note'              => '',
		'edd-payment-downloads-changed' => '',
		'edd-order-download-amount'     => '',
		'edd-order-download-select'     => '',
		'edd-payment-details-downloads' => array( $payment_download ),
		'edd-payment-address'           => array( $payment_address ),
		'edd-payment-user-id'           => '1',
		'edd-payment-user-email'        => $user->user_email,
		'edd-payment-user-name'         => $user->first_name . ' ' . $user->last_name,
		'edd-payment-time-min'          => '',
		'edd-payment-time-hour'         => '',
		'edd-payment-date'              => '',
		'edd-payment-status'            => 'publish',
		'edd-payment-total'             => '50'
	);

	$_POST['edd-payment-total'] = '50';
	$_POST['edd-payment-tax']   = '0';

	do_action( 'edd_update_payment_details', $data );

	$post_update_total_earnings = get_option( 'edd_earnings_total' );
	$new_total_earnings         = $pre_update_total_earnings - $pre_update_payment_amount + $_POST['edd-payment-total'];

	$this->assertEquals( $post_update_total_earnings, $new_total_earnings );
}