From 0fd722c7b5c4c6c8b90acd7d8290a3e89f1ea8c0 Mon Sep 17 00:00:00 2001
From: Arun Babu Neelicattu <arun.neelicattu@gmail.com>
Date: Fri, 23 Apr 2021 01:19:25 +0200
Subject: [PATCH] dependency: mark unstable releases as prerelease

Relates-to: python-poetry/poetry#2963
---
 poetry/core/packages/dependency.py | 29 ++++++++++++++++-------------
 tests/packages/test_dependency.py  | 17 +++++++++++++++++
 2 files changed, 33 insertions(+), 13 deletions(-)

diff --git a/poetry/core/packages/dependency.py b/poetry/core/packages/dependency.py
index 6e06bc6fa..d2c4406ac 100644
--- a/poetry/core/packages/dependency.py
+++ b/poetry/core/packages/dependency.py
@@ -9,22 +9,23 @@
 from typing import Optional
 from typing import Union
 
+from poetry.core.packages.constraints import (
+    parse_constraint as parse_generic_constraint,
+)
+from poetry.core.packages.specification import PackageSpecification
 from poetry.core.semver.helpers import parse_constraint
+from poetry.core.semver.version_range_constraint import VersionRangeConstraint
 from poetry.core.version.markers import parse_marker
 
-from .constraints import parse_constraint as parse_generic_constraint
-from .specification import PackageSpecification
-
 
 if TYPE_CHECKING:
-    from poetry.core.semver.helpers import VersionTypes  # noqa
-    from poetry.core.version.markers import BaseMarker  # noqa
-
-    from .constraints import BaseConstraint  # noqa
-    from .directory_dependency import DirectoryDependency  # noqa
-    from .file_dependency import FileDependency  # noqa
-    from .package import Package
-    from .types import DependencyTypes
+    from poetry.core.packages.constraints import BaseConstraint
+    from poetry.core.packages.directory_dependency import DirectoryDependency
+    from poetry.core.packages.file_dependency import FileDependency
+    from poetry.core.packages.package import Package
+    from poetry.core.packages.types import DependencyTypes
+    from poetry.core.semver.helpers import VersionTypes
+    from poetry.core.version.markers import BaseMarker
 
 
 class Dependency(PackageSpecification):
@@ -41,7 +42,6 @@ def __init__(
         source_reference: Optional[str] = None,
         source_resolved_reference: Optional[str] = None,
     ):
-        from poetry.core.semver.version_range import VersionRange
         from poetry.core.version.markers import AnyMarker
 
         super(Dependency, self).__init__(
@@ -60,7 +60,10 @@ def __init__(
         self._optional = optional
         self._category = category
 
-        if isinstance(self._constraint, VersionRange) and self._constraint.min:
+        if (
+            isinstance(self._constraint, VersionRangeConstraint)
+            and self._constraint.min
+        ):
             allows_prereleases = (
                 allows_prereleases or self._constraint.min.is_unstable()
             )
diff --git a/tests/packages/test_dependency.py b/tests/packages/test_dependency.py
index e849b1ebb..635077055 100644
--- a/tests/packages/test_dependency.py
+++ b/tests/packages/test_dependency.py
@@ -12,6 +12,23 @@ def test_accepts():
     assert dependency.accepts(package)
 
 
+@pytest.mark.parametrize(
+    "constraint,result",
+    [
+        ("^1.0", False),
+        ("^1.0.dev0", True),
+        ("^1.0.0", False),
+        ("^1.0.0.dev0", True),
+        ("^1.0.0.alpha0", True),
+        ("^1.0.0.alpha0+local", True),
+        ("^1.0.0.rc0+local", True),
+        ("^1.0.0-1", False),
+    ],
+)
+def test_allows_prerelease(constraint, result):
+    assert Dependency("A", constraint).allows_prereleases() == result
+
+
 def test_accepts_prerelease():
     dependency = Dependency("A", "^1.0", allows_prereleases=True)
     package = Package("A", "1.4-beta.1")