--TEST--
Test that providers can not be installed if they are not selected
--COMPOSER--
{
    "repositories": [
        {
            "type": "package",
            "package": [
                {
                    "name": "foo/polyfill",
                    "provide": {
                        "foo/standard": "1.0.0"
                    },
                    "version": "1.0.0"
                },
                {
                    "name": "foo/standard",
                    "require": {
                        "foo/does-not-exist": "1.0.0"
                    },
                    "version": "1.0.0"
                }
            ]
        }
    ],
    "require": {
        "foo/standard": "1.0.0"
    }
}

--RUN--
update

--EXPECT-EXIT-CODE--
2

--EXPECT-OUTPUT--
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Root composer.json requires foo/standard 1.0.0 -> satisfiable by foo/standard[1.0.0].
    - foo/standard 1.0.0 requires foo/does-not-exist 1.0.0 -> could not be found in any version, there may be a typo in the package name.

Potential causes:
 - A typo in the package name
 - The package is not available in a stable-enough version according to your minimum-stability setting
   see <https://getcomposer.org/doc/04-schema.md#minimum-stability> for more details.
 - It's a private package and you forgot to add a custom repository to find it

Read <https://getcomposer.org/doc/articles/troubleshooting.md> for further common problems.

--EXPECT--