composer/tests/Composer/Test/Fixtures/installer/partial-update-keeps-older-dep-if-still-required.test

--TEST--
Ensure that a partial update of a dependency does not conflict if the only way to proceed is using an old locked version.

--COMPOSER--
{
    "repositories": [
        {
            "type": "package",
            "package": [
                {"name": "root/req1", "version": "1.0.0", "require": {"dep/pkg1": "1.*"}},
                {"name": "root/req2", "version": "1.0.0", "require": {"dep/pkg2": "1.*"}},
                {"name": "dep/pkg1", "version": "1.0.0"},
                {"name": "dep/pkg1", "version": "2.0.0"},
                {"name": "dep/pkg2", "version": "1.0.0"},
                {"name": "dep/pkg2", "version": "1.0.1"},
                {"name": "dep/pkg2", "version": "1.2.0", "require": {"dep/pkg1": "2.*"}}
            ]
        }
    ],
    "require": {
        "root/req1": "*",
        "root/req2": "*"
    }
}
--LOCK--
{
    "packages": [
        {"name": "dep/pkg1", "version": "1.0.0", "type": "library"},
        {"name": "dep/pkg2", "version": "1.0.1", "type": "library"},
        {"name": "root/req1", "version": "1.0.0", "require": {"dep/pkg1": "1.*"}, "type": "library"},
        {"name": "root/req2", "version": "1.0.0", "require": {"dep/pkg2": "1.*"}, "type": "library"}
    ],
    "packages-dev": [],
    "aliases": [],
    "minimum-stability": "stable",
    "stability-flags": {},
    "prefer-stable": false,
    "prefer-lowest": false,
    "platform": {},
    "platform-dev": {}
}
--RUN--
update dep/pkg2 --with-dependencies
--EXPECT-LOCK--
{
    "packages": [
        {"name": "dep/pkg1", "version": "1.0.0", "type": "library"},
        {"name": "dep/pkg2", "version": "1.0.1", "type": "library"},
        {"name": "root/req1", "version": "1.0.0", "require": {"dep/pkg1": "1.*"}, "type": "library"},
        {"name": "root/req2", "version": "1.0.0", "require": {"dep/pkg2": "1.*"}, "type": "library"}
    ],
    "packages-dev": [],
    "aliases": [],
    "minimum-stability": "stable",
    "stability-flags": {},
    "prefer-stable": false,
    "prefer-lowest": false,
    "platform": {},
    "platform-dev": {}
}
--EXPECT--
Installing dep/pkg1 (1.0.0)
Installing root/req1 (1.0.0)
Installing dep/pkg2 (1.0.1)
Installing root/req2 (1.0.0)