Add const_vaues tests

test/BUILD

@@ -2,6 +2,7 @@ load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
 load(":ast_file_tests.bzl", "ast_file_test_suite")
 load(":bzl_test.bzl", "bzl_test")
 load(":compiler_arguments_tests.bzl", "compiler_arguments_test_suite")
+load(":const_values_tests.bzl", "const_values_test_suite")
 load(":coverage_settings_tests.bzl", "coverage_settings_test_suite")
 load(":debug_settings_tests.bzl", "debug_settings_test_suite")
 load(":explicit_modules_test.bzl", "explicit_modules_test_suite")
@@ -25,6 +26,8 @@ ast_file_test_suite(name = "ast_file")
 
 compiler_arguments_test_suite(name = "compiler_arguments")
 
+const_values_test_suite(name = "const_values")
+
 coverage_settings_test_suite(name = "coverage_settings")
 
 debug_settings_test_suite(name = "debug_settings")

test/const_values_tests.bzl

@@ -0,0 +1,115 @@
+# Copyright 2024 The Bazel Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Tests for `const_values`."""
+
+load(
+    "@build_bazel_rules_swift//test/rules:action_command_line_test.bzl",
+    "make_action_command_line_test_rule",
+)
+load(
+    "@build_bazel_rules_swift//test/rules:provider_test.bzl",
+    "make_provider_test_rule",
+    "provider_test",
+)
+
+const_values_test = make_action_command_line_test_rule()
+
+no_const_values_test = make_action_command_line_test_rule(
+    config_settings = {
+        "//command_line_option:features": [
+            "-swift._supports_const_value_extraction",
+        ],
+    },
+)
+
+const_values_wmo_test = make_provider_test_rule(
+    config_settings = {
+        str(Label("@build_bazel_rules_swift//swift:copt")): [
+            "-whole-module-optimization",
+        ],
+    },
+)
+
+def const_values_test_suite(name):
+    """Test suite for `swift_library` producing .swiftconstvalues files.
+
+    Args:
+      name: the base name to be used in things created by this macro
+    """
+
+    provider_test(
+        name = "{}_empty_const_values_single_file".format(name),
+        expected_files = [
+            "test/fixtures/debug_settings/simple_objs/Empty.swift.swiftconstvalues",
+        ],
+        field = "const_values",
+        provider = "OutputGroupInfo",
+        tags = [name],
+        target_under_test = "@build_bazel_rules_swift//test/fixtures/debug_settings:simple",
+    )
+
+    provider_test(
+        name = "{}_empty_const_values_multiple_files".format(name),
+        expected_files = [
+            "test/fixtures/multiple_files/multiple_files_objs/Empty.swift.swiftconstvalues",
+            "test/fixtures/multiple_files/multiple_files_objs/Empty2.swift.swiftconstvalues",
+        ],
+        field = "const_values",
+        provider = "OutputGroupInfo",
+        tags = [name],
+        target_under_test = "@build_bazel_rules_swift//test/fixtures/multiple_files",
+    )
+
+    const_values_wmo_test(
+        name = "{}_wmo_single_values_file".format(name),
+        expected_files = [
+            "test/fixtures/multiple_files/multiple_files.swiftconstvalues",
+        ],
+        field = "const_values",
+        provider = "OutputGroupInfo",
+        tags = [name],
+        target_under_test = "@build_bazel_rules_swift//test/fixtures/multiple_files",
+    )
+
+    const_values_test(
+        name = "{}_expected_argv".format(name),
+        expected_argv = [
+            "-Xfrontend -const-gather-protocols-file",
+            "-Xfrontend swift/toolchains/config/const_extract_protocols.json",
+            "-emit-const-values-path",
+            "first.swift.swiftconstvalues",
+        ],
+        mnemonic = "SwiftCompile",
+        tags = [name],
+        target_under_test = "@build_bazel_rules_swift//test/fixtures/basic:first",
+    )
+
+    no_const_values_test(
+        name = "{}_not_expected_argv".format(name),
+        not_expected_argv = [
+            "-Xfrontend -const-gather-protocols-file",
+            "-Xfrontend swift/toolchains/config/const_extract_protocols.json",
+            "-emit-const-values-path",
+            "first.swift.swiftconstvalues",
+        ],
+        mnemonic = "SwiftCompile",
+        tags = [name],
+        target_under_test = "@build_bazel_rules_swift//test/fixtures/basic:first",
+    )
+
+    native.test_suite(
+        name = name,
+        tags = [name],
+    )

test/output_file_map_tests.bzl

@@ -50,6 +50,7 @@ def output_file_map_test_suite(name):
         name = "{}_default".format(name),
         expected_mapping = {
             "object": "test/fixtures/debug_settings/simple_objs/Empty.swift.o",
+            "const-values": "test/fixtures/debug_settings/simple_objs/Empty.swift.swiftconstvalues",
         },
         file_entry = "test/fixtures/debug_settings/Empty.swift",
         output_file_map = "test/fixtures/debug_settings/simple.output_file_map.json",