EmailSubjectContains example

        self::assertThat($email, new LogicalNot(new MimeConstraint\EmailHeaderSame($headerName, $expectedValue)), $message);
    }

    public static function assertEmailAddressContains(RawMessage $email, string $headerName, string $expectedValue, string $message = ''): void
    {
        self::assertThat($email, new MimeConstraint\EmailAddressContains($headerName, $expectedValue), $message);
    }

    public static function assertEmailSubjectContains(RawMessage $email, string $expectedValue, string $message = ''): void
    {
        self::assertThat($email, new MimeConstraint\EmailSubjectContains($expectedValue), $message);
    }

    public static function assertEmailSubjectNotContains(RawMessage $email, string $expectedValue, string $message = ''): void
    {
        self::assertThat($email, new LogicalNot(new MimeConstraint\EmailSubjectContains($expectedValue)), $message);
    }

    /** * @return MessageEvent[] */
    public static function getMailerEvents(string $transport = null): array
    {