--TEST--

See Github issue #4795 ( github.com/composer/composer/issues/4795 ).

Composer\Installer::allowListUpdateDependencies should not output a warning for dependencies that need to be updated
that are also a root package, when that root package is also explicitly allowed.

--COMPOSER--
{
    "repositories": [
        {
            "type": "package",
            "package": [
                { "name": "a/a", "version": "1.0.0" },
                { "name": "a/a", "version": "1.1.0" },
                { "name": "b/b", "version": "1.0.0", "require": { "a/a": "~1.0" } },
                { "name": "b/b", "version": "1.1.0", "require": { "a/a": "~1.1" } }
            ]
        }
    ],
    "require": {
        "a/a": "~1.0",
        "b/b": "~1.0"
    }
}

--INSTALLED--
[
    { "name": "a/a", "version": "1.0.0" },
    { "name": "b/b", "version": "1.0.0", "require": { "a/a": "~1.0" } }
]

--RUN--
update a/a b/b --with-dependencies

--EXPECT-OUTPUT--
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 0 installs, 2 updates, 0 removals
Writing lock file
Generating autoload files

--EXPECT--
Updating a/a (1.0.0) to a/a (1.1.0)
Updating b/b (1.0.0) to b/b (1.1.0)