composer/tests/Composer/Test/Fixtures/installer/update-downgrades-unstable-packages.test

--TEST--
Downgrading from unstable to more stable package should work even if already installed
--COMPOSER--
{
    "repositories": [
        {
            "type": "package",
            "package": [
                {
                    "name": "a/a", "version": "dev-master",
                    "source": { "reference": "abcd", "url": "", "type": "git" }
                },
                {
                    "name": "a/a", "version": "1.0.0",
                    "source": { "reference": "1.0.0", "url": "", "type": "git" },
                    "dist": { "reference": "1.0.0", "url": "", "type": "zip", "shasum": "" }
                },
                {
                    "name": "b/b", "version": "dev-master",
                    "source": { "reference": "abcd", "url": "", "type": "git" }
                },
                {
                    "name": "b/b", "version": "1.0.0",
                    "source": { "reference": "1.0.0", "url": "", "type": "git" },
                    "dist": { "reference": "1.0.0", "url": "", "type": "zip", "shasum": "" }
                }
            ]
        }
    ],
    "require": {
        "a/a": "*",
        "b/b": "*@dev"
    }
}
--INSTALLED--
[
    {
        "name": "a/a", "version": "dev-master",
        "source": { "reference": "abcd", "url": "", "type": "git" }
    },
    {
        "name": "b/b", "version": "dev-master",
        "source": { "reference": "abcd", "url": "", "type": "git" }
    }
]
--RUN--
update
--EXPECT--
Marking a/a (9999999-dev abcd) as uninstalled, alias of a/a (dev-master abcd)
Downgrading a/a (dev-master abcd => 1.0.0)