1 files changed, 39 insertions, 0 deletions
diff --git a/searchcore/src/tests/proton/server/disk_mem_usage_metrics/disk_mem_usage_metrics_test.cpp b/searchcore/src/tests/proton/server/disk_mem_usage_metrics/disk_mem_usage_metrics_test.cpp
new file mode 100644
index 00000000000..569633c518b
--- /dev/null
+++ b/searchcore/src/tests/proton/server/disk_mem_usage_metrics/disk_mem_usage_metrics_test.cpp
@@ -0,0 +1,39 @@
+// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+#include <vespa/searchcore/proton/server/disk_mem_usage_metrics.h>
+#include <vespa/searchcore/proton/server/disk_mem_usage_state.h>
+#include <vespa/vespalib/gtest/gtest.h>
+
+
+using proton::DiskMemUsageMetrics;
+using proton::DiskMemUsageState;
+using proton::ResourceUsageState;
+
+bool
+expect_metrics(double disk_usage, double disk_utilization, double memory_usage, double memory_utilization, const DiskMemUsageMetrics &dm_metrics)
+{
+    bool result = true;
+    EXPECT_DOUBLE_EQ(disk_usage, dm_metrics.get_disk_usage()) << (result = false, "");
+    EXPECT_DOUBLE_EQ(disk_utilization, dm_metrics.get_disk_utilization()) << (result = false, "");
+    EXPECT_DOUBLE_EQ(memory_usage, dm_metrics.get_memory_usage()) << (result = false, "");
+    EXPECT_DOUBLE_EQ(memory_utilization, dm_metrics.get_memory_utilization()) << (result = false, "");
+    return result;
+}
+
+TEST(DiskMemUsageMetricsTest, default_value_is_zero)
+{
+    DiskMemUsageMetrics dm_metrics;
+    EXPECT_TRUE(expect_metrics(0.0, 0.0, 0.0, 0.0, dm_metrics));
+}
+
+TEST(DiskMemUsageMetricsTest, merging_uses_max)
+{
+    DiskMemUsageMetrics dm_metrics({ResourceUsageState(0.5, 0.4), ResourceUsageState(0.5, 0.3)});
+    EXPECT_TRUE(expect_metrics(0.4, 0.8, 0.3, 0.6, dm_metrics));
+    dm_metrics.merge({ResourceUsageState(0.4, 0.4), ResourceUsageState(0.5, 0.4)});
+    EXPECT_TRUE(expect_metrics(0.4, 1.0, 0.4, 0.8, dm_metrics));
+    dm_metrics.merge({ResourceUsageState(0.5, 0.4), ResourceUsageState(0.5, 0.3)});
+    EXPECT_TRUE(expect_metrics(0.4, 1.0, 0.4, 0.8, dm_metrics));
+}
+
+GTEST_MAIN_RUN_ALL_TESTS()