--TEST--

See GitHub issue #6661 ( github.com/composer/composer/issues/6661 ).

When `--with-all-dependencies` is used, Composer should update the dependencies of all allowed packages, even if the dependency is a root requirement.

--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" } }
]
--LOCK--
{
    "packages": [
        { "name": "a/a", "version": "1.0.0" },
        { "name": "b/b", "version": "1.0.0", "require": { "a/a": "~1.0" } }
    ],
    "packages-dev": [],
    "aliases": [],
    "minimum-stability": "dev",
    "stability-flags": {},
    "prefer-stable": false,
    "prefer-lowest": false,
    "platform": {},
    "platform-dev": {}
}
--RUN--
update b/b --with-all-dependencies

--EXPECT-OUTPUT--
Loading composer repositories with package information
Updating dependencies
Lock file operations: 0 installs, 2 updates, 0 removals
  - Upgrading a/a (1.0.0 => 1.1.0)
  - Upgrading b/b (1.0.0 => 1.1.0)
Writing lock file
Installing dependencies from lock file (including require-dev)
Package operations: 0 installs, 2 updates, 0 removals
Generating autoload files

--EXPECT--
Upgrading a/a (1.0.0 => 1.1.0)
Upgrading b/b (1.0.0 => 1.1.0)