Raise UnsupportedWheel when .dist-info doesn't match name

This aligns with the previous behavior that would have enforced the
found .dist-info directory starting with the name of the package.

We raise UnsupportedWheel because it looks better in output than the
AssertionError (which includes traceback).

src/pip/_internal/operations/install/wheel.py

@@ -22,6 +22,7 @@ from email.parser import Parser
 from pip._vendor import pkg_resources
 from pip._vendor.distlib.scripts import ScriptMaker
 from pip._vendor.distlib.util import get_export_entry
+from pip._vendor.packaging.utils import canonicalize_name
 from pip._vendor.six import StringIO
 
 from pip._internal.exceptions import InstallationError, UnsupportedWheel
@@ -314,8 +315,10 @@ def install_unpacked_wheel(
     :param pycompile: Whether to byte-compile installed Python files
     :param warn_script_location: Whether to check that scripts are installed
         into a directory on PATH
-    :raises UnsupportedWheel: when the directory holds an unpacked wheel with
-        incompatible Wheel-Version
+    :raises UnsupportedWheel:
+        * when the directory holds an unpacked wheel with incompatible
+          Wheel-Version
+        * when the .dist-info dir does not match the wheel
     """
     # TODO: Investigate and break this up.
     # TODO: Look into moving this into a dedicated class for representing an
@@ -443,6 +446,15 @@ def install_unpacked_wheel(
         req_description
     )
 
+    info_dir_name = canonicalize_name(os.path.basename(info_dir[0]))
+    canonical_name = canonicalize_name(name)
+    if not info_dir_name.startswith(canonical_name):
+        raise UnsupportedWheel(
+            "{} .dist-info directory {!r} does not start with {!r}".format(
+                req_description, os.path.basename(info_dir[0]), canonical_name
+            )
+        )
+
     # Get the defined entry points
     ep_file = os.path.join(info_dir[0], 'entry_points.txt')
     console, gui = get_entrypoints(ep_file)

tests/functional/test_install_wheel.py

@@ -1,6 +1,7 @@
 import distutils
 import glob
 import os
+import shutil
 
 import pytest
 
@@ -451,3 +452,23 @@ def test_wheel_install_fails_with_extra_dist_info(script):
         "install", "--no-cache-dir", "--no-index", package, expect_error=True
     )
     assert "Multiple .dist-info directories" in result.stderr
+
+
+def test_wheel_install_fails_with_unrelated_dist_info(script):
+    package = create_basic_wheel_for_package(script, "simple", "0.1.0")
+    new_name = "unrelated-2.0.0-py2.py3-none-any.whl"
+    new_package = os.path.join(os.path.dirname(package), new_name)
+    shutil.move(package, new_package)
+
+    result = script.pip(
+        "install",
+        "--no-cache-dir",
+        "--no-index",
+        new_package,
+        expect_error=True,
+    )
+
+    assert (
+        "'simple-0.1.0.dist-info' does not start with 'unrelated'"
+        in result.stderr
+    )