Added unit tests to verify correct normalization of package name

Author: deveshks

tests/functional/test_install_wheel.py

@@ -1,5 +1,6 @@
 import distutils
 import glob
+import json
 import os
 import shutil
 
@@ -587,3 +588,18 @@ def test_wheel_install_fails_with_badly_encoded_metadata(script):
     assert "Error decoding metadata for" in result.stderr
     assert "simple-0.1.0-py2.py3-none-any.whl" in result.stderr
     assert "METADATA" in result.stderr
+
+
+@pytest.mark.parametrize(
+    'package_name',
+    ['simple-package', 'simple_package'],
+)
+def test_correct_package_name_while_creating_wheel_bug(script, package_name):
+    """Check that the package name is correctly parsed and listed
+    while creating  a .whl file with a given format and installing it
+    """
+    package = create_basic_wheel_for_package(script, package_name, '1.0')
+    script.pip("install", "--no-cache-dir", "--no-index", package)
+    result = script.pip('list', '--format=json')
+    assert {"name": "simple-package", "version": "1.0"} \
+        in json.loads(result.stdout)