samples: getTable (#165)

* samples: getTable

* nit updates

samples/src/main/java/com/example/bigquery/GetTable.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed 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 com.example.bigquery;
+
+// [START bigquery_get_table]
+import com.google.cloud.bigquery.BigQuery;
+import com.google.cloud.bigquery.BigQueryException;
+import com.google.cloud.bigquery.BigQueryOptions;
+import com.google.cloud.bigquery.Table;
+import com.google.cloud.bigquery.TableId;
+
+public class GetTable {
+
+  public static void runGetTable() {
+    // TODO(developer): Replace these variables before running the sample.
+    String projectId = "bigquery_public_data";
+    String datasetName = "samples";
+    String tableName = "shakespeare";
+    getTable(projectId, datasetName, tableName);
+  }
+
+  public static void getTable(String projectId, String datasetName, String tableName) {
+    try {
+      // Initialize client that will be used to send requests. This client only needs to be created
+      // once, and can be reused for multiple requests.
+      BigQuery bigquery = BigQueryOptions.getDefaultInstance().getService();
+
+      TableId tableId = TableId.of(projectId, datasetName, tableName);
+      Table table = bigquery.getTable(tableId);
+      System.out.println("Table info: " + table.getDescription());
+    } catch (BigQueryException e) {
+      System.out.println("Table not retrieved. \n" + e.toString());
+    }
+  }
+}
+// [END bigquery_get_table]

samples/src/test/java/com/example/bigquery/GetTableIT.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Licensed 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 com.example.bigquery;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+public class GetTableIT {
+  private ByteArrayOutputStream bout;
+  private PrintStream out;
+
+  @Before
+  public void setUp() throws Exception {
+    bout = new ByteArrayOutputStream();
+    out = new PrintStream(bout);
+    System.setOut(out);
+  }
+
+  @After
+  public void tearDown() {
+    System.setOut(null);
+  }
+
+  @Test
+  public void testGetTable() {
+    // Get shakespeare table from bigquery-public-data:samples dataset
+    GetTable.getTable("bigquery-public-data", "samples", "shakespeare");
+    assertThat(bout.toString()).contains("Table info:");
+  }
+}

samples/src/test/java/com/example/bigquery/ListDatasetsIT.java

@@ -41,7 +41,7 @@ public void tearDown() {
   }
 
   @Test
-  public void listDatasets() {
+  public void testListDatasets() {
     // List datasets in bigquery-public-data project
     ListDatasets.listDatasets("bigquery-public-data");
     assertThat(bout.toString()).contains("Success! Dataset ID");