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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.flags.file;
import com.yahoo.vespa.flags.FetchVector;
import com.yahoo.vespa.flags.FlagId;
import com.yahoo.vespa.flags.json.FlagData;
import com.yahoo.vespa.test.file.TestFileSystem;
import org.hamcrest.collection.IsMapContaining;
import org.junit.jupiter.api.Test;
import java.nio.charset.StandardCharsets;
import java.nio.file.FileSystem;
import java.nio.file.Files;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import static com.yahoo.yolean.Exceptions.uncheck;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.equalTo;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
/**
* @author hakonhall
*/
public class FlagDbFileTest {
private final FileSystem fileSystem = TestFileSystem.create();
private final FlagDbFile flagDb = new FlagDbFile(fileSystem);
@Test
void test() {
Map<FlagId, FlagData> dataMap = new HashMap<>();
FlagId id1 = new FlagId("id1");
FlagData data1 = new FlagData(id1, new FetchVector());
dataMap.put(id1, data1);
FlagId id2 = new FlagId("id2");
FlagData data2 = new FlagData(id2, new FetchVector());
dataMap.put(id2, data2);
// Non-existing directory => empty map
assertTrue(flagDb.read().isEmpty());
// sync() will create directory with map content
assertThat(flagDb.sync(dataMap), equalTo(true));
Map<FlagId, FlagData> readDataMap = flagDb.read();
assertEquals(2, readDataMap.size());
assertThat(readDataMap, IsMapContaining.hasKey(id1));
assertThat(readDataMap, IsMapContaining.hasKey(id2));
assertThat(getDbContent(), equalTo("{\"flags\":[{\"id\":\"id1\"},{\"id\":\"id2\"}]}"));
// another sync with the same data is a no-op
assertThat(flagDb.sync(dataMap), equalTo(false));
// Changing value of id1, removing id2, adding id3
dataMap.remove(id2);
FlagData newData1 = new FlagData(id1, new FetchVector().with(FetchVector.Dimension.HOSTNAME, "h1"));
dataMap.put(id1, newData1);
FlagId id3 = new FlagId("id3");
FlagData data3 = new FlagData(id3, new FetchVector());
dataMap.put(id3, data3);
assertThat(flagDb.sync(dataMap), equalTo(true));
Map<FlagId, FlagData> anotherReadDataMap = flagDb.read();
assertEquals(2, anotherReadDataMap.size());
assertThat(anotherReadDataMap, IsMapContaining.hasKey(id1));
assertThat(anotherReadDataMap, IsMapContaining.hasKey(id3));
assertThat(anotherReadDataMap.get(id1).serializeToJson(), equalTo("{\"id\":\"id1\",\"attributes\":{\"hostname\":\"h1\"}}"));
assertThat(flagDb.sync(Collections.emptyMap()), equalTo(true));
assertThat(getDbContent(), equalTo("{\"flags\":[]}"));
}
public String getDbContent() {
return uncheck(() -> new String(Files.readAllBytes(flagDb.getPath()), StandardCharsets.UTF_8));
}
}
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