--TEST--
Partial update without lock file should error
--COMPOSER--
{
    "repositories": [
        {
            "type": "package",
            "package": [
                { "name": "a/old", "version": "1.0.0" },
                { "name": "a/old", "version": "2.0.0" },
                { "name": "b/unstable", "version": "1.0.0" },
                { "name": "b/unstable", "version": "1.1.0-alpha" },
                { "name": "c/uptodate", "version": "1.0.0" },
                { "name": "d/removed", "version": "1.0.0" }
            ]
        }
    ],
    "require": {
        "a/old": "*",
        "b/unstable": "*",
        "c/uptodate": "*"
    }
}
--INSTALLED--
[
    { "name": "a/old", "version": "1.0.0" },
    { "name": "b/unstable", "version": "1.1.0-alpha" },
    { "name": "c/uptodate", "version": "1.0.0" },
    { "name": "d/removed", "version": "1.0.0" }
]
--RUN--
update b/unstable
--EXPECT-OUTPUT--
Cannot update only a partial set of packages without a lock file present. Run `composer update` to generate a lock file.
--EXPECT-EXIT-CODE--
3
--EXPECT--