Automatically find latest version of pip for assertion

tests/test_uploader.py

@@ -1,3 +1,5 @@
+import re
+import subprocess
 import sys
 import contextlib
 import json
@@ -441,6 +443,19 @@ def test__unique_filename(spec_file, expected):
     assert expected == uploader._unique_filename(spec_file, packaging.PEX_PACKER)
 
 
+def get_latest_pip_version() -> str:
+    p = subprocess.Popen("pip index versions pip", shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+    for line in p.stdout.readlines():
+        result = re.match(r"pip \((.+)\)", line.decode("utf-8"))
+        if result:
+            return result.group(1)
+    return None
+
+
+def test_lateste_pip():
+    assert get_latest_pip_version() is not None
+
+
 def test_format_pex_requirements():
     with tempfile.TemporaryDirectory() as tempdir:
         requirements = ["pipdeptree==2.0.0", "six==1.15.0"]
@@ -451,7 +466,8 @@ def test_format_pex_requirements():
             pex_inherit_path="false")
         pex_info = PexInfo.from_pex(f"{tempdir}/out.pex")
         cleaned_requirements = uploader._format_pex_requirements(pex_info)
-        assert ['pip==24.2', 'pipdeptree==2.0.0', 'six==1.15.0'] == cleaned_requirements
+        assert [f'pip=={get_latest_pip_version()}',
+                'pipdeptree==2.0.0', 'six==1.15.0'] == cleaned_requirements
 
 
 @pytest.mark.parametrize("req, expected", [