src/Context/Message/MessageContext.php
public function assertMessages($negate, $type, TableNode $messages)
    {
        foreach ($messages->getRowsHash() as $message => $placeholders) {
            $args = [];

            foreach ((array) $placeholders as $placeholder) {
                // Group values: !name => Text.
                $data = array_map('trim', explode('=>', $placeholder, 2));

                if (count($data) === 2) {
                    $args[$data[0]] = $data[1];
                }
            }

            $this->assertMessage($negate, $type, $message, $args);
        }
    }
public function assertMessages($negate, $type, TableNode $messages)
    {
        foreach ($messages->getRowsHash() as $message => $placeholders) {
            $args = [];

            foreach ((array) $placeholders as $placeholder) {
                // Group values: !name => Text.
                $data = array_map('trim', explode('=>', $placeholder, 2));

                if (count($data) === 2) {
                    $args[$data[0]] = $data[1];
                }
            }

            $this->assertMessage($negate, $type, $message, $args);
        }
    }
@example
Then should see the following error messages:
| !name field is required.  | !name => E-mail address |

@param string $negate
Indicates that user should or should not see message on the page.
@param string $type
Message type: error, warning, success. Could be empty.
@param TableNode $messages
Messages to found. Placeholders allowed.

@Then /^(?:|I )should(| not) see the following (.* )messages:$/