wip: analysis tests basic

Author: rickeylev

python/private/pypi/dependency_specifier_flag.bzl

@@ -85,6 +85,8 @@ def pypa_dep_spec(**kwargs):
             "//conditions:default": "",
         }),
         # todo: copied from pep508_env.bzl
+        # todo: pep508_env and evaluate have an "aliases" thing that needs
+        # to be incorporated
         # todo: there are many more cpus. Unfortunately, it doesn't look like
         # the value is directly accessible to starlark. It might be possible to
         # get it via CcToolchain.cpu though.

tests/pypi/pep508/BUILD.bazel

@@ -1,4 +1,5 @@
 load(":deps_tests.bzl", "deps_test_suite")
+load(":depspec_flag_tests.bzl", "depspec_flag_test_suite")
 load(":evaluate_tests.bzl", "evaluate_test_suite")
 load(":requirement_tests.bzl", "requirement_test_suite")
 
@@ -13,3 +14,7 @@ evaluate_test_suite(
 requirement_test_suite(
     name = "requirement_tests",
 )
+
+depspec_flag_test_suite(
+    name = "depspec_flag_tests",
+)

tests/pypi/pep508/depspec_flag_tests.bzl

@@ -0,0 +1,28 @@
+load("@rules_testing//lib:test_suite.bzl", "test_suite")
+load("//python/private/pypi:pep508_env.bzl", pep508_env = "env")  # buildifier: disable=bzl-visibility
+load("//python/private/pypi:pep508_evaluate.bzl", "evaluate", "tokenize")  # buildifier: disable=bzl-visibility
+
+_tests = []
+
+def test_whatever(name):
+    def impl(env, target):
+        # todo: create FeatureFlagInfo subject
+        actual = target[config_common.FeatureFlagInfo].value
+        env.expect.that_string(actual).equals("yes")
+
+    depspec_flag(
+        name = name + "_subject",
+    )
+    analysis_test(
+        name = name,
+        impl = impl,
+        target = name + "_subject",
+        config_settings = {
+        },
+    )
+
+def depspec_flag_tests(name):
+    test_suite(
+        name = name,
+        tests = _tests,
+    )