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ExtractTableToJsonIT.java
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ExtractTableToJsonIT.java
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/*
* 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 static junit.framework.TestCase.assertNotNull;
import com.google.cloud.bigquery.FormatOptions;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.junit.After;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
public class ExtractTableToJsonIT {
private final Logger log = Logger.getLogger(this.getClass().getName());
private ByteArrayOutputStream bout;
private PrintStream out;
private PrintStream originalPrintStream;
private static final String GCS_BUCKET = System.getenv("GCS_BUCKET");
private static void requireEnvVar(String varName) {
assertNotNull(
"Environment variable " + varName + " is required to perform these tests.",
System.getenv(varName));
}
@BeforeClass
public static void checkRequirements() {
requireEnvVar("GCS_BUCKET");
}
@Before
public void setUp() throws Exception {
bout = new ByteArrayOutputStream();
out = new PrintStream(bout);
originalPrintStream = System.out;
System.setOut(out);
}
@After
public void tearDown() {
// restores print statements in the original method
System.out.flush();
System.setOut(originalPrintStream);
log.log(Level.INFO, "\n" + bout.toString());
}
@Test
public void testExtractTableToJson() {
String projectId = "bigquery-public-data";
String datasetName = "samples";
String tableName = "shakespeare";
String destinationUri = "gs://" + GCS_BUCKET + "/extractTest.json";
// FormatOptions.json() is not "JSON" but "NEWLINE_DELIMITED_JSON"
String dataFormat = FormatOptions.json().getType();
// Extract table content to GCS in JSON format
ExtractTableToJson.extractTableToJson(
projectId, datasetName, tableName, destinationUri, dataFormat);
assertThat(bout.toString())
.contains("Table export successful. Check in GCS bucket for the " + dataFormat + " file.");
}
}