Fix nuget string representation

Signed-off-by: Tushar Goel <tushar.goel.dav@gmail.com>

Author: TG1999

src/univers/versions.py

@@ -305,6 +305,9 @@ def is_valid(cls, string):
         except ValueError:
             return False
 
+    def __str__(self):
+        return str(self.string)
+
     def __lt__(self, other):
         return nuget.Version.from_string(self.string) < nuget.Version.from_string(other.string)
 

tests/test_nuget.py

@@ -18,7 +18,7 @@
 # https://github.com/NuGet/NuGet.Client/blob/dev/test/NuGet.Core.Tests/NuGet.Versioning.Test/VersionComparerTests.cs
 
 import unittest
-from univers import nuget
+from univers.versions import NugetVersion
 
 
 class NuGetTest(unittest.TestCase):
@@ -29,7 +29,7 @@ def setUp(self):
 
     def check_order(self, comparison, first, second):
         """Check order."""
-        comparison(nuget.Version.from_string(first), nuget.Version.from_string(second))
+        comparison(NugetVersion.build_value(first), NugetVersion.build_value(second))
 
     def test_equals(self):
         """Test version equals."""

tests/test_version_range.py

@@ -9,13 +9,15 @@
 
 from univers.version_constraint import VersionConstraint
 from univers.version_range import GemVersionRange
+from univers.version_range import NugetVersionRange
 from univers.version_range import InvalidVersionRange
 from univers.version_range import PypiVersionRange
 from univers.version_range import VersionRange
 from univers.version_range import RANGE_CLASS_BY_SCHEMES
 from univers.version_range import NpmVersionRange
 from univers.version_range import OpensslVersionRange
 from univers.versions import PypiVersion
+from univers.versions import NugetVersion
 from univers.versions import RubygemsVersion
 from univers.versions import SemverVersion
 from univers.versions import OpensslVersion
@@ -262,6 +264,18 @@ def test_OpensslVersionRange_from_versions(self):
         version_range = OpensslVersionRange.from_versions(sequence)
         assert version_range == expected
 
+    def test_nuget_version_range(self):
+        nuget_range = "[1.0.0, 2.0.0)"
+        expected = NugetVersionRange(
+            constraints=(
+                VersionConstraint(comparator=">=", version=NugetVersion(string="1.0.0")),
+                VersionConstraint(comparator="<", version=NugetVersion(string="2.0.0")),
+            )
+        )
+        version_range = NugetVersionRange.from_native(nuget_range)
+        assert version_range == expected
+        assert version_range.to_string() == "vers:nuget/>=1.0.0|<2.0.0"
+
 
 VERSION_RANGE_TESTS_BY_SCHEME = {
     "nginx": ["0.8.40+", "0.7.52-0.8.39", "0.9.10", "1.5.0+, 1.4.1+"],