Tests calculating the difference between two sets of configuration.
function testDiff() {
$active = $this->container
->get('config.storage');
$staging = $this->container
->get('config.storage.staging');
$config_name = 'config_test.system';
$change_key = 'foo';
$remove_key = '404';
$add_key = 'biff';
$add_data = 'bangpow';
$change_data = 'foobar';
$original_data = array(
'foo' => 'bar',
'404' => 'herp',
);
// Install the default config.
config_install_default_config('module', 'config_test');
// Change a configuration value in staging.
$staging_data = $original_data;
$staging_data[$change_key] = $change_data;
$staging_data[$add_key] = $add_data;
$staging
->write($config_name, $staging_data);
// Verify that the diff reflects a change.
$diff = config_diff($active, $staging, $config_name);
$this
->assertEqual($diff->edits[0]->type, 'change', 'The first item in the diff is a change.');
$this
->assertEqual($diff->edits[0]->orig[0], $change_key . ': ' . $original_data[$change_key], format_string("The active value for key '%change_key' is '%original_data'.", array(
'%change_key' => $change_key,
'%original_data' => $original_data[$change_key],
)));
$this
->assertEqual($diff->edits[0]->closing[0], $change_key . ': ' . $change_data, format_string("The staging value for key '%change_key' is '%change_data'.", array(
'%change_key' => $change_key,
'%change_data' => $change_data,
)));
// Reset data back to original, and remove a key
$staging_data = $original_data;
unset($staging_data[$remove_key]);
$staging
->write($config_name, $staging_data);
// Verify that the diff reflects a removed key.
$diff = config_diff($active, $staging, $config_name);
$this
->assertEqual($diff->edits[0]->type, 'copy', 'The first item in the diff is a copy.');
$this
->assertEqual($diff->edits[1]->type, 'delete', 'The second item in the diff is a delete.');
$this
->assertEqual($diff->edits[1]->orig[0], $remove_key . ': ' . $original_data[$remove_key], format_string("The active value for key '%remove_key' is '%original_data'.", array(
'%remove_key' => $remove_key,
'%original_data' => $original_data[$remove_key],
)));
$this
->assertFalse($diff->edits[1]->closing, format_string("The key '%remove_key' does not exist in staging.", array(
'%remove_key' => $remove_key,
)));
// Reset data back to original and add a key
$staging_data = $original_data;
$staging_data[$add_key] = $add_data;
$staging
->write($config_name, $staging_data);
// Verify that the diff reflects an added key.
$diff = config_diff($active, $staging, $config_name);
$this
->assertEqual($diff->edits[0]->type, 'copy', 'The first item in the diff is a copy.');
$this
->assertEqual($diff->edits[1]->type, 'add', 'The second item in the diff is an add.');
$this
->assertFalse($diff->edits[1]->orig, format_string("The key '%add_key' does not exist in active.", array(
'%add_key' => $add_key,
)));
$this
->assertEqual($diff->edits[1]->closing[0], $add_key . ': ' . $add_data, format_string("The staging value for key '%add_key' is '%add_data'.", array(
'%add_key' => $add_key,
'%add_data' => $add_data,
)));
}