<td>`argument` is a `std::tuple` const reference with `n + 1` elements, where the i-th element matches `std::get*(argument)`</td>
</tr>
<tr>
<td>`FieldPairsAre(m0, m1, ..., mn)`</td>
<td> matches a pair (2-tuple) of tuples where matcher `mi` matches the i-th fields of the tuples; usually for use inside `Pointwise()` or `UnorderedPointwise()`</td>
</tr>
</table>
#### Web
**deps:**`"//webutil/url:test_utils"`<br>
`#include "webutil/url/test_utils.h"`
<aname="table23"></a>
<tableborder="1"cellspacing="0"cellpadding="1">
<tr>
<td>`webutil_url::testing::HasUrlArg(key)`</td>
<td>`argument` is a URL string that has a query argument whose name is `key`. E.g. `http://foo.com/bar?key=value`</td>