fix test and add debug values

Author: aignas

tests/toolchains/defs.bzl

@@ -15,6 +15,7 @@
 ""
 
 load("//python:versions.bzl", "PLATFORMS", "TOOL_VERSIONS")
+load("//python/private:version.bzl", "version")  # buildifier: disable=bzl-visibility
 load("//tests/support:py_reconfig.bzl", "py_reconfig_test")
 
 def define_toolchain_tests(name):
@@ -38,13 +39,15 @@ def define_toolchain_tests(name):
             is_platform = "_is_{}".format(platform_key)
             target_compatible_with[is_platform] = []
 
+        parsed = version.parse(python_version, strict = True)
+        expect_python_version = "{0}.{1}.{2}".format(*parsed.release)
         py_reconfig_test(
             name = "python_{}_test".format(python_version),
             srcs = ["python_toolchain_test.py"],
             main = "python_toolchain_test.py",
             python_version = python_version,
             env = {
-                "EXPECT_PYTHON_VERSION": python_version,
+                "EXPECT_PYTHON_VERSION": expect_python_version,
             },
             deps = ["//python/runfiles"],
             data = ["//tests/support:current_build_settings"],

tests/toolchains/python_toolchain_test.py

@@ -3,8 +3,11 @@
 import pathlib
 import pprint
 import sys
+import textwrap
 import unittest
 
+print("PYTHONPATH is:")
+print(textwrap.indent("\n".join(sys.path), prefix=" " * 4))
 from python.runfiles import runfiles