AMashenkov commented on code in PR #2494: URL: https://github.com/apache/ignite-3/pull/2494#discussion_r1307415709
########## modules/system-view/src/test/java/org/apache/ignite/internal/systemview/SystemViewTest.java: ########## @@ -0,0 +1,255 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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. + */ + +package org.apache.ignite.internal.systemview; + +import static org.junit.jupiter.api.Assertions.assertEquals; +import static org.junit.jupiter.api.Assertions.assertNotNull; +import static org.junit.jupiter.api.Assertions.assertSame; +import static org.junit.jupiter.api.Assertions.assertThrows; + +import java.util.List; +import java.util.concurrent.CompletableFuture; +import java.util.function.Supplier; +import org.apache.ignite.internal.systemview.NodeSystemView.Builder; +import org.apache.ignite.internal.util.AsyncCursor; +import org.junit.jupiter.api.Nested; +import org.junit.jupiter.api.Test; +import org.junit.jupiter.api.function.Executable; + +/** + * Tests for {@link SystemView}. + */ +public class SystemViewTest { + + /** Builds a cluster view. */ + @Test + public void buildClusterView() { + Supplier<AsyncCursor<Dummy>> dataProvider = dataProvider(); + + ClusterSystemView<Dummy> view = ClusterSystemView.<Dummy>builder() + .name("view") + .addColumn("c1", int.class, (d) -> 0) + .addColumn("c2", Long.class, (d) -> 1L) + .dataProvider(dataProvider) + .build(); + + assertEquals("view", view.name(), "name"); + assertEquals(2, view.columns().size(), "columns"); + + expectColumn(view.columns().get(0), "c1", int.class); + expectColumn(view.columns().get(1), "c2", Long.class); + + assertSame(dataProvider, view.dataProvider(), "data provider"); + } + + /** Builds a node view. */ + @Test + public void buildNodeView() { + Supplier<AsyncCursor<Dummy>> dataProvider = dataProvider(); + + NodeSystemView<Dummy> view = NodeSystemView.<Dummy>builder() + .name("view") + .addColumn("c1", int.class, (d) -> 0) + .addColumn("c2", Long.class, (d) -> 1L) + .nodeNameColumnAlias("node_name") + .dataProvider(dataProvider) + .build(); + + assertEquals("view", view.name(), "name"); + assertEquals(2, view.columns().size(), "columns"); + + expectColumn(view.columns().get(0), "c1", int.class); + expectColumn(view.columns().get(1), "c2", Long.class); + + assertSame(dataProvider, view.dataProvider(), "data provider"); + assertEquals("node_name", view.nodeNameColumnAlias(), "node name column alias"); + } + + /** Reject a node view without node name alias. */ + @Test + public void rejectNodeViewWithoutNodeNameColumnAlias() { + expectThrows(NullPointerException.class, () -> { + NodeSystemView.<Dummy>builder() + .name("name") + .addColumn("c1", int.class, (d) -> 0) + .dataProvider(dataProvider()) + .build(); + }, "nodeNameColumnAlias"); + } + + /** + * Tests for {@link NodeSystemView.Builder}. + */ + @Nested + public class NodeViewBuilderTest extends BuilderTest<NodeSystemView<Dummy>, Builder<Dummy>> { + + @Override + protected NodeSystemView.Builder<Dummy> newBuilder() { + return NodeSystemView.builder(); + } + } + + /** + * Tests for {@link ClusterSystemView.Builder}. + */ + @Nested + public class ClusterViewBuilderTest extends BuilderTest<ClusterSystemView<Dummy>, ClusterSystemView.Builder<Dummy>> { + + @Override + protected ClusterSystemView.Builder<Dummy> newBuilder() { + return ClusterSystemView.builder(); + } + } + + /** + * Common tests for view builder classes. + * + * @param <V> View type. + * @param <B> Builder type. + */ + public abstract class BuilderTest<V extends SystemView<Dummy>, + B extends SystemView.SystemViewBuilder<V, Dummy, B>> { + + protected abstract B newBuilder(); + + /** Reject a view with {@code null} name. */ + @Test + public void rejectViewWithNullName() { + expectThrows(NullPointerException.class, () -> { + newBuilder() + .name(null) + .addColumn("c1", int.class, (d) -> 0) + .dataProvider(dataProvider()) + .build(); + }, "name"); + } + + /** Reject a view without name. */ + @Test + public void rejectViewWithUnspecifiedName() { + expectThrows(NullPointerException.class, () -> { + newBuilder() + .addColumn("c1", int.class, (d) -> 0) + .dataProvider(dataProvider()) + .build(); + }, "name"); + } + + /** Reject a view without columns. */ + @Test + public void rejectViewWithoutColumns() { + expectThrows(IllegalArgumentException.class, () -> { + newBuilder() + .name("dummy") + .dataProvider(dataProvider()) + .build(); + }, "SystemView should have at least one column"); + } + + /** Reject a view with {@code null} column name. */ + @Test + public void rejectViewWithNullColumnName() { + expectThrows(NullPointerException.class, () -> { + newBuilder() + .name("dummy") + .addColumn(null, int.class, (d) -> 0) + .dataProvider(dataProvider()) + .build(); + }, "name"); + } + + /** Reject a view with {@code null} column type. */ + @Test + public void rejectViewWithNullColumnType() { + expectThrows(NullPointerException.class, () -> { + newBuilder() + .name("dummy") + .addColumn("c1", null, (d) -> 0) + .dataProvider(dataProvider()) + .build(); + }, "type"); + } + + /** Reject a view with {@code null} column value function. */ + @Test + public void rejectViewWithNullColumnFunction() { + expectThrows(NullPointerException.class, () -> { + newBuilder() + .name("dummy") + .addColumn("c1", int.class, null) + .dataProvider(dataProvider()) + .build(); + }, "value"); + } + + + /** Reject a view without data provider. */ + @Test + public void rejectViewWithoutDataProvider() { + expectThrows(NullPointerException.class, () -> { + newBuilder() + .name("dummy") + .addColumn("c1", int.class, (d) -> 0) + .build(); + }, "dataProvider"); + } + + /** Reject a view with {@code null} data provider. */ + @Test + public void rejectViewWithoutNullDataProvider() { + expectThrows(NullPointerException.class, () -> { + newBuilder() + .name("dummy") + .addColumn("c1", int.class, (d) -> 0) + .dataProvider(null) + .build(); + }, "dataProvider"); + } + } + + + private static void expectColumn(SystemViewColumn<?, ?> col, String name, Class<?> type) { + assertEquals(name, col.name(), "name"); + assertSame(type, col.type(), "type"); + assertNotNull(col.value(), "value"); + } + + private static final class Dummy { + + + } + + private static void expectThrows(Class<? extends Throwable> type, Executable action, String errorMessage) { + Throwable t = assertThrows(type, action); + assertEquals(errorMessage, t.getMessage()); + } + + private static Supplier<AsyncCursor<Dummy>> dataProvider() { + return () -> new AsyncCursor<>() { + @Override + public CompletableFuture<BatchedResult<Dummy>> requestNextAsync(int rows) { + return CompletableFuture.completedFuture(new BatchedResult<>(List.of(), false)); + } + + @Override + public CompletableFuture<Void> closeAsync() { + return CompletableFuture.completedFuture(null); + } + }; + } +} Review Comment: ```suggestion } ``` -- This is an automated message from the Apache Git Service. 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