Unit tests for view

Signed-off-by: Peter Nied <[email protected]>

server/src/test/java/org/opensearch/cluster/metadata/ViewTests.java

@@ -0,0 +1,97 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+/*
+ * Modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
+package org.opensearch.cluster.metadata;
+
+import org.opensearch.cluster.metadata.View.Target;
+import org.opensearch.common.UUIDs;
+import org.opensearch.core.common.io.stream.Writeable;
+import org.opensearch.core.index.Index;
+import org.opensearch.core.xcontent.XContentParser;
+import org.opensearch.test.AbstractSerializingTestCase;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
+import static org.opensearch.cluster.DataStreamTestHelper.createTimestampField;
+import static org.opensearch.cluster.metadata.DataStream.getDefaultBackingIndexName;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.empty;
+import static org.hamcrest.Matchers.equalTo;
+
+public class ViewTests extends AbstractSerializingTestCase<View> {
+
+    private static List<Target> randomTargets() {
+        int numTargets = randomIntBetween(0, 128);
+        List<Target> targets = new ArrayList<>(numTargets);
+        for (int i = 0; i < numTargets; i++) {
+            targets.add(new Target(randomAlphaOfLength(10).toLowerCase(Locale.ROOT));
+        }
+        return targets;
+    }
+
+    private static View randomInstance() {
+        final List<Target> targets = randomTargets();
+        final String viewName = randomAlphaOfLength(10).toLowerCase(Locale.ROOT);
+        final String description = randomAlphaOfLength(100).toLowerCase(Locale.ROOT);
+        return new View(viewName, description, Math.abs(randomLong()), Math.abs(randomLong()), targets);
+    }
+
+    @Override
+    protected View doParseInstance(XContentParser parser) throws IOException {
+        return View.fromXContent(parser);
+    }
+
+    @Override
+    protected Writeable.Reader<View> instanceReader() {
+        return View::new;
+    }
+
+    @Override
+    protected View createTestInstance() {
+        return randomInstance();
+    }
+
+    public void testNullName() {
+        final NullPointerException npe = assertThrows(NullPointerException.class, () -> new View(null, null, null, null, null));
+
+        assertThat(npe.getMessage(), equalTo("Name must be provided"));
+    }
+
+    public void testNullTargets() {
+        final NullPointerException npe = assertThrows(NullPointerException.class, () -> new View("name", null, null, null, null));
+
+        assertThat(npe.getMessage(), equalTo("Targets are required on a view"));
+    }
+
+    public void testNullTargetIndexPattern() {
+        final NullPointerException npe = assertThrows(NullPointerException.class, () -> new View.Target(null));
+
+        assertThat(npe.getMessage(), equalTo("IndexPattern is required"));
+    }
+
+
+    public void testDefaultValues() {
+        final View view = new View("myName", null, null, null, List.of());
+
+        assertThat(view.name, equalTo("myName"));
+        assertThat(view.description, equalTo(null));
+        assertThat(view.createdAt, equalTo(-1L));
+        assertThat(view.modifiedAt, equalTo(-1L));
+        assertThat(view.targets, empty());
+    }
+
+
+}