mixology: ensure dependency cache respects source

src/poetry/mixology/version_solver.py

@@ -41,18 +41,26 @@ class DependencyCache:
 
     def __init__(self, provider: Provider) -> None:
         self.provider = provider
-        self.cache: dict[str, list[DependencyPackage]] = {}
+        self.cache: dict[
+            tuple[str, str | None, str | None, str | None], list[DependencyPackage]
+        ] = {}
 
     @functools.lru_cache(maxsize=128)
     def search_for(self, dependency: Dependency) -> list[DependencyPackage]:
-        complete_name = dependency.complete_name
-        packages = self.cache.get(complete_name)
+        key = (
+            dependency.complete_name,
+            dependency.source_type,
+            dependency.source_url,
+            dependency.source_reference,
+        )
+
+        packages = self.cache.get(key)
         if packages is None:
             packages = self.provider.search_for(dependency)
         else:
             packages = [p for p in packages if dependency.constraint.allows(p.version)]
 
-        self.cache[complete_name] = packages
+        self.cache[key] = packages
 
         return packages
 

tests/mixology/version_solver/test_dependency_cache.py

+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from poetry.factory import Factory
+from poetry.mixology.version_solver import DependencyCache
+from tests.mixology.helpers import add_to_repo
+
+
+if TYPE_CHECKING:
+    from poetry.core.packages.project_package import ProjectPackage
+
+    from poetry.repositories import Repository
+    from tests.mixology.version_solver.conftest import Provider
+
+
+def test_solver_dependency_cache_respects_source_type(
+    root: ProjectPackage, provider: Provider, repo: Repository
+):
+    dependency_pypi = Factory.create_dependency("demo", ">=0.1.0")
+    dependency_git = Factory.create_dependency(
+        "demo", {"git": "https://github.com/demo/demo.git"}, groups=["dev"]
+    )
+    root.add_dependency(dependency_pypi)
+    root.add_dependency(dependency_git)
+
+    add_to_repo(repo, "demo", "1.0.0")
+
+    cache = DependencyCache(provider)
+    cache.search_for.cache_clear()
+
+    # ensure cache was never hit for both calls
+    cache.search_for(dependency_pypi)
+    cache.search_for(dependency_git)
+    assert not cache.search_for.cache_info().hits
+
+    packages_pypi = cache.search_for(dependency_pypi)
+    packages_git = cache.search_for(dependency_git)
+
+    assert cache.search_for.cache_info().hits == 2
+    assert cache.search_for.cache_info().currsize == 2
+
+    assert len(packages_pypi) == len(packages_git) == 1
+    assert packages_pypi != packages_git
+
+    package_pypi = packages_pypi[0]
+    package_git = packages_git[0]
+
+    assert package_pypi.package.name == dependency_pypi.name
+    assert package_pypi.package.version.text == "1.0.0"
+
+    assert package_git.package.name == dependency_git.name
+    assert package_git.package.version.text == "0.1.2"
+    assert package_git.package.source_type == dependency_git.source_type
+    assert package_git.package.source_url == dependency_git.source_url
+    assert (
+        package_git.package.source_resolved_reference
+        == "9cf87a285a2d3fbb0b9fa621997b3acc3631ed24"
+    )