From d6cd374295c113c18f5435d144741e8340ec1f59 Mon Sep 17 00:00:00 2001
From: Geir Storli <geirst@oath.com>
Date: Fri, 9 Mar 2018 13:34:21 +0000
Subject: Finalize ClusterStateBundle to return derived cluster state if bucket
 space is found.

Add unit tests for ClusterStateBundle.
---
 vdslib/src/tests/state/CMakeLists.txt              |  1 +
 .../src/tests/state/cluster_state_bundle_test.cpp  | 77 ++++++++++++++++++++++
 .../vespa/vdslib/state/cluster_state_bundle.cpp    |  8 ++-
 .../src/vespa/vdslib/state/cluster_state_bundle.h  |  1 +
 4 files changed, 84 insertions(+), 3 deletions(-)
 create mode 100644 vdslib/src/tests/state/cluster_state_bundle_test.cpp

(limited to 'vdslib/src')

diff --git a/vdslib/src/tests/state/CMakeLists.txt b/vdslib/src/tests/state/CMakeLists.txt
index 8e394fc18c5..8b1957a91bb 100644
--- a/vdslib/src/tests/state/CMakeLists.txt
+++ b/vdslib/src/tests/state/CMakeLists.txt
@@ -1,6 +1,7 @@
 # Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 vespa_add_library(vdslib_teststate
     SOURCES
+    cluster_state_bundle_test.cpp
     clusterstatetest.cpp
     nodestatetest.cpp
     DEPENDS
diff --git a/vdslib/src/tests/state/cluster_state_bundle_test.cpp b/vdslib/src/tests/state/cluster_state_bundle_test.cpp
new file mode 100644
index 00000000000..4798fe505f8
--- /dev/null
+++ b/vdslib/src/tests/state/cluster_state_bundle_test.cpp
@@ -0,0 +1,77 @@
+// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+#include <vespa/vdslib/state/cluster_state_bundle.h>
+#include <vespa/vdslib/state/clusterstate.h>
+
+#include <cppunit/extensions/HelperMacros.h>
+
+using document::BucketSpace;
+
+namespace storage::lib {
+
+using ClusterStatePtr = std::shared_ptr<const ClusterState>;
+
+struct ClusterStateBundleTest : public CppUnit::TestFixture {
+    CPPUNIT_TEST_SUITE(ClusterStateBundleTest);
+    CPPUNIT_TEST(derived_state_is_returned_if_bucket_space_is_found);
+    CPPUNIT_TEST(baseline_state_is_returned_if_bucket_space_is_not_found);
+    CPPUNIT_TEST(verify_equality_operator);
+    CPPUNIT_TEST_SUITE_END();
+
+    void derived_state_is_returned_if_bucket_space_is_found();
+    void baseline_state_is_returned_if_bucket_space_is_not_found();
+    void verify_equality_operator();
+};
+
+CPPUNIT_TEST_SUITE_REGISTRATION(ClusterStateBundleTest);
+
+struct Fixture {
+    ClusterState baselineState;
+    ClusterStatePtr derivedState;
+    ClusterStateBundle bundle;
+    Fixture()
+        : baselineState("storage:2"),
+          derivedState(std::make_shared<const ClusterState>("storage:2 .1.s:m")),
+          bundle(baselineState, {{BucketSpace(1), derivedState}})
+    {}
+    ~Fixture() {}
+};
+
+void
+ClusterStateBundleTest::derived_state_is_returned_if_bucket_space_is_found()
+{
+    Fixture f;
+    CPPUNIT_ASSERT_EQUAL(*f.derivedState, *f.bundle.getDerivedClusterState(BucketSpace(1)));
+}
+
+void
+ClusterStateBundleTest::baseline_state_is_returned_if_bucket_space_is_not_found()
+{
+    Fixture f;
+    CPPUNIT_ASSERT_EQUAL(f.baselineState, *f.bundle.getDerivedClusterState(BucketSpace(2)));
+}
+
+ClusterStateBundle
+makeBundle(const vespalib::string &baselineState, const std::map<BucketSpace, vespalib::string> &derivedStates)
+{
+    ClusterStateBundle::BucketSpaceStateMapping derivedBucketSpaceStates;
+    for (const auto &entry : derivedStates) {
+        derivedBucketSpaceStates[entry.first] = std::make_shared<const ClusterState>(entry.second);
+    }
+    return ClusterStateBundle(ClusterState(baselineState), std::move(derivedBucketSpaceStates));
+}
+
+void
+ClusterStateBundleTest::verify_equality_operator()
+{
+    Fixture f;
+    CPPUNIT_ASSERT(f.bundle != makeBundle("storage:3", {{BucketSpace(1), "storage:2 .1.s:m"}}));
+    CPPUNIT_ASSERT(f.bundle != makeBundle("storage:2", {}));
+    CPPUNIT_ASSERT(f.bundle != makeBundle("storage:2", {{BucketSpace(1), "storage:2 .0.s:m"}}));
+    CPPUNIT_ASSERT(f.bundle != makeBundle("storage:2", {{BucketSpace(2), "storage:2 .1.s:m"}}));
+
+    CPPUNIT_ASSERT_EQUAL(f.bundle, makeBundle("storage:2", {{BucketSpace(1), "storage:2 .1.s:m"}}));
+}
+
+}
+
diff --git a/vdslib/src/vespa/vdslib/state/cluster_state_bundle.cpp b/vdslib/src/vespa/vdslib/state/cluster_state_bundle.cpp
index cf9c0ba6dff..ed561d67f6d 100644
--- a/vdslib/src/vespa/vdslib/state/cluster_state_bundle.cpp
+++ b/vdslib/src/vespa/vdslib/state/cluster_state_bundle.cpp
@@ -28,10 +28,12 @@ ClusterStateBundle::getBaselineClusterState() const
 }
 
 const std::shared_ptr<const lib::ClusterState> &
-ClusterStateBundle::getDerivedClusterState(document::BucketSpace) const
+ClusterStateBundle::getDerivedClusterState(document::BucketSpace bucketSpace) const
 {
-    // For now, just return the baseline cluster state.
-    // TODO use _derivedBucketSpaceStates
+    auto itr = _derivedBucketSpaceStates.find(bucketSpace);
+    if (itr != _derivedBucketSpaceStates.end()) {
+        return itr->second;
+    }
     return _baselineClusterState;
 }
 
diff --git a/vdslib/src/vespa/vdslib/state/cluster_state_bundle.h b/vdslib/src/vespa/vdslib/state/cluster_state_bundle.h
index a8ee0b54713..a64416762b8 100644
--- a/vdslib/src/vespa/vdslib/state/cluster_state_bundle.h
+++ b/vdslib/src/vespa/vdslib/state/cluster_state_bundle.h
@@ -36,6 +36,7 @@ public:
     }
     uint32_t getVersion() const;
     bool operator==(const ClusterStateBundle &rhs) const;
+    bool operator!=(const ClusterStateBundle &rhs) const { return !operator==(rhs); }
 };
 
 std::ostream& operator<<(std::ostream&, const ClusterStateBundle&);
-- 
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