test: config_settings matching latest minor versions (#1738)

This is a followup to #1720 to add better tests as commented in the PR
and we ensure that we match correctly when the config setting is
configured to a minor version.

tests/config_settings/construct_config_settings_tests.bzl

@@ -13,6 +13,7 @@
 # limitations under the License.
 """Tests for construction of Python version matching config settings."""
 
+load("@//python:versions.bzl", "MINOR_MAPPING")
 load("@rules_testing//lib:analysis_test.bzl", "analysis_test")
 load("@rules_testing//lib:test_suite.bzl", "test_suite")
 load("@rules_testing//lib:truth.bzl", "subjects")
@@ -30,6 +31,7 @@ _subject = rule(
         "match_micro": attr.string(),
         "match_minor": attr.string(),
         "no_match": attr.string(),
+        "no_match_micro": attr.string(),
     },
 )
 
@@ -74,6 +76,54 @@ def _test_minor_version_matching_impl(env, target):
 
 _tests.append(_test_minor_version_matching)
 
+def _test_latest_micro_version_matching(name):
+    rt_util.helper_target(
+        _subject,
+        name = name + "_subject",
+        match_minor = select({
+            "//python/config_settings:is_python_3.12": "matched-3.12",
+            "//conditions:default": "matched-default",
+        }),
+        match_micro = select({
+            "//python/config_settings:is_python_" + MINOR_MAPPING["3.12"]: "matched-3.12",
+            "//conditions:default": "matched-default",
+        }),
+        no_match_micro = select({
+            "//python/config_settings:is_python_3.12.0": "matched-3.12",
+            "//conditions:default": "matched-default",
+        }),
+        no_match = select({
+            "//python/config_settings:is_python_" + MINOR_MAPPING["3.11"]: "matched-3.11",
+            "//conditions:default": "matched-default",
+        }),
+    )
+
+    analysis_test(
+        name = name,
+        target = name + "_subject",
+        impl = _test_latest_micro_version_matching_impl,
+        config_settings = {
+            str(Label("//python/config_settings:python_version")): "3.12",
+        },
+    )
+
+def _test_latest_micro_version_matching_impl(env, target):
+    target = env.expect.that_target(target)
+    target.attr("match_minor", factory = subjects.str).equals(
+        "matched-3.12",
+    )
+    target.attr("match_micro", factory = subjects.str).equals(
+        "matched-3.12",
+    )
+    target.attr("no_match_micro", factory = subjects.str).equals(
+        "matched-default",
+    )
+    target.attr("no_match", factory = subjects.str).equals(
+        "matched-default",
+    )
+
+_tests.append(_test_latest_micro_version_matching)
+
 def construct_config_settings_test_suite(name):
     test_suite(
         name = name,