Use literal file names in test_commands

There is no need for the strings to be real file paths. Using
string literals makes the test obvious to follow. This continues the
work aimed at removing the binary test artifacts from the repository.

tests/test_commands.py

@@ -2,7 +2,6 @@
 
 import pytest
 
-from tests import helpers
 from twine import commands
 from twine import exceptions
 
@@ -55,38 +54,39 @@ def test_find_dists_handles_real_files():
 def test_split_inputs():
     """Split inputs into dists, signatures, and attestations."""
     inputs = [
-        helpers.WHEEL_FIXTURE,
-        helpers.WHEEL_FIXTURE + ".asc",
-        helpers.WHEEL_FIXTURE + ".build.attestation",
-        helpers.WHEEL_FIXTURE + ".publish.attestation",
-        helpers.SDIST_FIXTURE,
-        helpers.SDIST_FIXTURE + ".asc",
-        helpers.NEW_WHEEL_FIXTURE,
-        helpers.NEW_WHEEL_FIXTURE + ".frob.attestation",
-        helpers.NEW_SDIST_FIXTURE,
+        "dist/twine-1.5.0-py2.py3-none-any.whl",
+        "dist/twine-1.5.0-py2.py3-none-any.whl.asc",
+        "dist/twine-1.5.0-py2.py3-none-any.whl.build.attestation",
+        "dist/twine-1.5.0-py2.py3-none-any.whl.build.publish.attestation",
+        "dist/twine-1.5.0.tar.gz",
+        "dist/twine-1.5.0.tar.gz.asc",
+        "dist/twine-1.6.5-py2.py3-none-any.whl",
+        "dist/twine-1.6.5-py2.py3-none-any.whl.frob.attestation",
+        "dist/twine-1.6.5.tar.gz",
     ]
 
     inputs = commands._split_inputs(inputs)
 
     assert inputs.dists == [
-        helpers.WHEEL_FIXTURE,
-        helpers.SDIST_FIXTURE,
-        helpers.NEW_WHEEL_FIXTURE,
-        helpers.NEW_SDIST_FIXTURE,
+        "dist/twine-1.5.0-py2.py3-none-any.whl",
+        "dist/twine-1.5.0.tar.gz",
+        "dist/twine-1.6.5-py2.py3-none-any.whl",
+        "dist/twine-1.6.5.tar.gz",
     ]
 
-    expected_signatures = {
-        os.path.basename(dist) + ".asc": dist + ".asc"
-        for dist in [helpers.WHEEL_FIXTURE, helpers.SDIST_FIXTURE]
+    assert inputs.signatures == {
+        "twine-1.5.0-py2.py3-none-any.whl.asc": "dist/twine-1.5.0-py2.py3-none-any.whl.asc",  # noqa: E501
+        "twine-1.5.0.tar.gz.asc": "dist/twine-1.5.0.tar.gz.asc",
     }
-    assert inputs.signatures == expected_signatures
 
     assert inputs.attestations_by_dist == {
-        helpers.WHEEL_FIXTURE: [
-            helpers.WHEEL_FIXTURE + ".build.attestation",
-            helpers.WHEEL_FIXTURE + ".publish.attestation",
+        "dist/twine-1.5.0-py2.py3-none-any.whl": [
+            "dist/twine-1.5.0-py2.py3-none-any.whl.build.attestation",
+            "dist/twine-1.5.0-py2.py3-none-any.whl.build.publish.attestation",
         ],
-        helpers.SDIST_FIXTURE: [],
-        helpers.NEW_WHEEL_FIXTURE: [helpers.NEW_WHEEL_FIXTURE + ".frob.attestation"],
-        helpers.NEW_SDIST_FIXTURE: [],
+        "dist/twine-1.5.0.tar.gz": [],
+        "dist/twine-1.6.5-py2.py3-none-any.whl": [
+            "dist/twine-1.6.5-py2.py3-none-any.whl.frob.attestation",
+        ],
+        "dist/twine-1.6.5.tar.gz": [],
     }