1 files changed, 52 insertions, 0 deletions
diff --git a/storage/src/tests/distributor/node_supported_features_repo_test.cpp b/storage/src/tests/distributor/node_supported_features_repo_test.cpp
new file mode 100644
index 00000000000..990e0fc50a3
--- /dev/null
+++ b/storage/src/tests/distributor/node_supported_features_repo_test.cpp
@@ -0,0 +1,52 @@
+// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+#include <vespa/storage/distributor/node_supported_features_repo.h>
+#include <vespa/vespalib/stllike/hash_map.hpp>
+#include <vespa/vespalib/gtest/gtest.h>
+
+using namespace ::testing;
+
+namespace storage::distributor {
+
+struct NodeSupportedFeaturesRepoTest : Test {
+    using FeatureMap = vespalib::hash_map<uint16_t, NodeSupportedFeatures>;
+    NodeSupportedFeaturesRepo _repo;
+
+    static NodeSupportedFeatures set_features() noexcept {
+        NodeSupportedFeatures f;
+        f.unordered_merge_chaining = true;
+        return f;
+    }
+
+    static NodeSupportedFeatures unset_features() noexcept {
+        return {};
+    }
+};
+
+TEST_F(NodeSupportedFeaturesRepoTest, feature_set_is_empty_by_default) {
+    EXPECT_EQ(_repo.node_supported_features(0), unset_features());
+    EXPECT_EQ(_repo.node_supported_features(12345), unset_features());
+}
+
+TEST_F(NodeSupportedFeaturesRepoTest, make_union_of_can_add_new_feature_mapping) {
+    FeatureMap fm;
+    fm[1] = set_features();
+    fm[60] = set_features();
+    auto new_repo = _repo.make_union_of(fm);
+    EXPECT_EQ(new_repo->node_supported_features(0), unset_features());
+    EXPECT_EQ(new_repo->node_supported_features(1), set_features());
+    EXPECT_EQ(new_repo->node_supported_features(60), set_features());
+}
+
+TEST_F(NodeSupportedFeaturesRepoTest, make_union_of_updates_existing_feature_mappings) {
+    FeatureMap fm;
+    fm[1] = set_features();
+    fm[60] = set_features();
+    auto new_repo = _repo.make_union_of(fm);
+    fm[1] = unset_features();
+    new_repo = new_repo->make_union_of(fm);
+    EXPECT_EQ(new_repo->node_supported_features(1), unset_features());
+    EXPECT_EQ(new_repo->node_supported_features(60), set_features());
+}
+
+}