Adds Cluster Balance Stats Tests

server/src/test/java/org/elasticsearch/cluster/routing/allocation/allocator/MetricStatsTests.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the "Elastic License
+ * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
+ * Public License v 1"; you may not use this file except in compliance with, at
+ * your election, the "Elastic License 2.0", the "GNU Affero General Public
+ * License v3.0 only", or the "Server Side Public License, v 1".
+ */
+
+package org.elasticsearch.cluster.routing.allocation.allocator;
+
+import org.elasticsearch.common.bytes.BytesReference;
+import org.elasticsearch.common.io.stream.Writeable;
+import org.elasticsearch.common.xcontent.XContentHelper;
+import org.elasticsearch.test.AbstractWireSerializingTestCase;
+import org.elasticsearch.xcontent.ToXContent;
+import org.elasticsearch.xcontent.XContentBuilder;
+import org.elasticsearch.xcontent.XContentFactory;
+
+import java.io.IOException;
+import java.util.Map;
+
+import static org.hamcrest.Matchers.equalTo;
+
+public class MetricStatsTests extends AbstractWireSerializingTestCase<ClusterBalanceStats.MetricStats> {
+
+    @Override
+    protected Writeable.Reader<ClusterBalanceStats.MetricStats> instanceReader() {
+        return ClusterBalanceStats.MetricStats::readFrom;
+    }
+
+    @Override
+    protected ClusterBalanceStats.MetricStats createTestInstance() {
+        return createRandomMetricStats();
+    }
+
+    public static ClusterBalanceStats.MetricStats createRandomMetricStats() {
+        return new ClusterBalanceStats.MetricStats(randomDouble(), randomDouble(), randomDouble(), randomDouble(), randomDouble());
+    }
+
+    @Override
+    protected ClusterBalanceStats.MetricStats mutateInstance(ClusterBalanceStats.MetricStats instance) throws IOException {
+        return createTestInstance();
+    }
+
+    public void testToXContent() throws IOException {
+        double total = randomDouble();
+        double min = randomDouble();
+        double max = randomDouble();
+        double average = randomDouble();
+        double stdDev = randomDouble();
+        ClusterBalanceStats.MetricStats stats = new ClusterBalanceStats.MetricStats(total, min, max, average, stdDev);
+
+        XContentBuilder builder = XContentFactory.jsonBuilder();
+        builder = stats.toXContent(builder, ToXContent.EMPTY_PARAMS);
+        // Convert to map for easy assertions
+        Map<String, Object> map = XContentHelper.convertToMap(BytesReference.bytes(builder), false, builder.contentType()).v2();
+
+        assertThat(map.get("total"), equalTo(total));
+        assertThat(map.get("min"), equalTo(min));
+        assertThat(map.get("max"), equalTo(max));
+        assertThat(map.get("average"), equalTo(average));
+        assertThat(map.get("std_dev"), equalTo(stdDev));
+    }
+}

server/src/test/java/org/elasticsearch/cluster/routing/allocation/allocator/TierBalanceStatsTests.java

@@ -0,0 +1,124 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the "Elastic License
+ * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
+ * Public License v 1"; you may not use this file except in compliance with, at
+ * your election, the "Elastic License 2.0", the "GNU Affero General Public
+ * License v3.0 only", or the "Server Side Public License, v 1".
+ */
+
+package org.elasticsearch.cluster.routing.allocation.allocator;
+
+import org.elasticsearch.common.bytes.BytesReference;
+import org.elasticsearch.common.io.stream.Writeable;
+import org.elasticsearch.common.xcontent.XContentHelper;
+import org.elasticsearch.test.AbstractWireSerializingTestCase;
+import org.elasticsearch.xcontent.ToXContent;
+import org.elasticsearch.xcontent.XContentBuilder;
+import org.elasticsearch.xcontent.XContentFactory;
+
+import java.io.IOException;
+import java.util.Map;
+
+import static org.elasticsearch.cluster.routing.allocation.allocator.MetricStatsTests.createRandomMetricStats;
+import static org.hamcrest.Matchers.containsInAnyOrder;
+
+public class TierBalanceStatsTests extends AbstractWireSerializingTestCase<ClusterBalanceStats.TierBalanceStats> {
+
+    @Override
+    protected Writeable.Reader<ClusterBalanceStats.TierBalanceStats> instanceReader() {
+        return ClusterBalanceStats.TierBalanceStats::readFrom;
+    }
+
+    @Override
+    protected ClusterBalanceStats.TierBalanceStats createTestInstance() {
+        return createRandomTierBalanceStats();
+    }
+
+    private ClusterBalanceStats.TierBalanceStats createRandomTierBalanceStats() {
+        return new ClusterBalanceStats.TierBalanceStats(
+            createRandomMetricStats(),
+            createRandomMetricStats(),
+            createRandomMetricStats(),
+            createRandomMetricStats(),
+            createRandomMetricStats()
+        );
+    }
+
+    @Override
+    protected ClusterBalanceStats.TierBalanceStats mutateInstance(ClusterBalanceStats.TierBalanceStats instance) throws IOException {
+        return createTestInstance();
+    }
+
+    @SuppressWarnings("unchecked")
+    public void testToXContent() throws IOException {
+        ClusterBalanceStats.MetricStats shardCount = createRandomMetricStats();
+        ClusterBalanceStats.MetricStats undesiredShardAllocations = createRandomMetricStats();
+        ClusterBalanceStats.MetricStats forecastWriteLoad = createRandomMetricStats();
+        ClusterBalanceStats.MetricStats forecastDiskUsage = createRandomMetricStats();
+        ClusterBalanceStats.MetricStats actualDiskUsage = createRandomMetricStats();
+        ClusterBalanceStats.TierBalanceStats tierBalanceStats = new ClusterBalanceStats.TierBalanceStats(
+            shardCount,
+            undesiredShardAllocations,
+            forecastWriteLoad,
+            forecastDiskUsage,
+            actualDiskUsage
+        );
+
+        XContentBuilder builder = XContentFactory.jsonBuilder();
+        builder = tierBalanceStats.toXContent(builder, ToXContent.EMPTY_PARAMS);
+        // Convert to map for easy assertions
+        Map<String, Object> map = XContentHelper.convertToMap(BytesReference.bytes(builder), false, builder.contentType()).v2();
+
+        assertThat(
+            map.keySet(),
+            containsInAnyOrder(
+                "shard_count",
+                "undesired_shard_allocation_count",
+                "forecast_write_load",
+                "forecast_disk_usage",
+                "actual_disk_usage"
+            )
+        );
+
+        Map<String, Object> shardCountStats = (Map<String, Object>) map.get("shard_count");
+        assertThat(shardCountStats.keySet(), containsInAnyOrder("total", "average", "min", "max", "std_dev"));
+        assertEquals(shardCountStats.get("total"), shardCount.total());
+        assertEquals(shardCountStats.get("average"), shardCount.average());
+        assertEquals(shardCountStats.get("min"), shardCount.min());
+        assertEquals(shardCountStats.get("max"), shardCount.max());
+        assertEquals(shardCountStats.get("std_dev"), shardCount.stdDev());
+
+        Map<String, Object> undesiredShardAllocationCountStats = (Map<String, Object>) map.get("undesired_shard_allocation_count");
+        assertThat(undesiredShardAllocationCountStats.keySet(), containsInAnyOrder("total", "average", "min", "max", "std_dev"));
+        assertEquals(undesiredShardAllocationCountStats.get("total"), undesiredShardAllocations.total());
+        assertEquals(undesiredShardAllocationCountStats.get("average"), undesiredShardAllocations.average());
+        assertEquals(undesiredShardAllocationCountStats.get("min"), undesiredShardAllocations.min());
+        assertEquals(undesiredShardAllocationCountStats.get("max"), undesiredShardAllocations.max());
+        assertEquals(undesiredShardAllocationCountStats.get("std_dev"), undesiredShardAllocations.stdDev());
+
+        Map<String, Object> forecastWriteLoadStats = (Map<String, Object>) map.get("forecast_write_load");
+        assertThat(forecastWriteLoadStats.keySet(), containsInAnyOrder("total", "average", "min", "max", "std_dev"));
+        assertEquals(forecastWriteLoadStats.get("total"), forecastWriteLoad.total());
+        assertEquals(forecastWriteLoadStats.get("average"), forecastWriteLoad.average());
+        assertEquals(forecastWriteLoadStats.get("min"), forecastWriteLoad.min());
+        assertEquals(forecastWriteLoadStats.get("max"), forecastWriteLoad.max());
+        assertEquals(forecastWriteLoadStats.get("std_dev"), forecastWriteLoad.stdDev());
+
+        Map<String, Object> forecastDiskUsageStats = (Map<String, Object>) map.get("forecast_disk_usage");
+        assertThat(forecastDiskUsageStats.keySet(), containsInAnyOrder("total", "average", "min", "max", "std_dev"));
+        assertEquals(forecastDiskUsageStats.get("total"), forecastDiskUsage.total());
+        assertEquals(forecastDiskUsageStats.get("average"), forecastDiskUsage.average());
+        assertEquals(forecastDiskUsageStats.get("min"), forecastDiskUsage.min());
+        assertEquals(forecastDiskUsageStats.get("max"), forecastDiskUsage.max());
+        assertEquals(forecastDiskUsageStats.get("std_dev"), forecastDiskUsage.stdDev());
+
+        Map<String, Object> actualDiskUsageStats = (Map<String, Object>) map.get("actual_disk_usage");
+        assertThat(actualDiskUsageStats.keySet(), containsInAnyOrder("total", "average", "min", "max", "std_dev"));
+        assertEquals(actualDiskUsageStats.get("total"), actualDiskUsage.total());
+        assertEquals(actualDiskUsageStats.get("average"), actualDiskUsage.average());
+        assertEquals(actualDiskUsageStats.get("min"), actualDiskUsage.min());
+        assertEquals(actualDiskUsageStats.get("max"), actualDiskUsage.max());
+        assertEquals(actualDiskUsageStats.get("std_dev"), actualDiskUsage.stdDev());
+    }
+}