1 files changed, 88 insertions, 0 deletions
diff --git a/tests/test_npm.py b/tests/test_npm.py
new file mode 100644
index 0000000..76cb6e2
--- /dev/null
+++ b/tests/test_npm.py
@@ -0,0 +1,88 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# Copyright (c) The python-semanticversion project
+# This code is distributed under the two-clause BSD License.
+
+"""Test NPM-style specifications."""
+
+import unittest
+
+from semantic_version import base
+
+
+class NpmSpecTests(unittest.TestCase):
+    examples = {
+        # range: [matchings], [failings]
+        '>=1.2.7': (
+            ['1.2.7', '1.2.8', '1.3.9'],
+            ['1.2.6', '1.1.0'],
+        ),
+        '>=1.2.7 <1.3.0': (
+            ['1.2.7', '1.2.8', '1.2.99'],
+            ['1.2.6', '1.3.0', '1.1.0'],
+        ),
+        '1.2.7 || >=1.2.9 <2.0.0': (
+            ['1.2.7', '1.2.9', '1.4.6'],
+            ['1.2.8', '2.0.0'],
+        ),
+        '>1.2.3-alpha.3': (
+            ['1.2.3-alpha.7', '3.4.5'],
+            ['1.2.3-alpha.3', '3.4.5-alpha.9'],
+        ),
+        '>=1.2.3-alpha.3': (
+            ['1.2.3-alpha.3', '1.2.3-alpha.7', '3.4.5'],
+            ['1.2.3-alpha.2', '3.4.5-alpha.9'],
+        ),
+        '1.2.3 - 2.3.4': (
+            ['1.2.3', '1.2.99', '2.2.0', '2.3.4', '2.3.4+b42'],
+            ['1.2.0', '1.2.3-alpha.1', '2.3.5'],
+        ),
+        '~1.2.3-beta.2': (
+            ['1.2.3-beta.2', '1.2.3-beta.4', '1.2.4'],
+            ['1.2.4-beta.2', '1.3.0'],
+        ),
+    }
+
+    def test_spec(self):
+        for spec, lists in self.examples.items():
+            matching, failing = lists
+            for version in matching:
+                with self.subTest(spec=spec, version=version):
+                    self.assertIn(base.Version(version), base.NpmSpec(spec))
+            for version in failing:
+                with self.subTest(spec=spec, version=version):
+                    self.assertNotIn(base.Version(version), base.NpmSpec(spec))
+
+    expansions = {
+        # Hyphen ranges
+        '1.2.3 - 2.3.4': '>=1.2.3 <=2.3.4',
+        '1.2 - 2.3.4': '>=1.2.0 <=2.3.4',
+        '1.2.3 - 2.3': '>=1.2.3 <2.4.0',
+        '1.2.3 - 2': '>=1.2.3 <3',
+
+        # X-Ranges
+        '*': '>=0.0.0',
+        '1.x': '>=1.0.0 <2.0.0',
+        '1.2.x': '>=1.2.0 <1.3.0',
+        '': '*',
+        '1': '1.x.x',
+        '1.x.x': '>=1.0.0 <2.0.0',
+        '1.2': '1.2.x',
+
+        # Tilde ranges
+        '~1.2.3': '>=1.2.3 <1.3.0',
+        '~1.2': '>=1.2.0 <1.3.0',
+        '~1': '>=1.0.0 <2.0.0',
+        '~0.2.3': '>=0.2.3 <0.3.0',
+        '~0.2': '>=0.2.0 <0.3.0',
+        '~0': '>=0.0.0 <1.0.0',
+        '~1.2.3-beta.2': '>=1.2.3-beta.2 <1.3.0',
+    }
+
+    def test_expand(self):
+        for source, expanded in self.expansions.items():
+            with self.subTest(source=source):
+                self.assertEqual(
+                    base.NpmSpec(source).clause,
+                    base.NpmSpec(expanded).clause,
+                )