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/*
* ============LICENSE_START=======================================================
* ONAP PAP
* ================================================================================
* Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.common.utils.coder;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.when;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.Writer;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.util.Arrays;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
public class StandardCoderTest {
private static final String EXPECTED_EXCEPTION = "expected exception";
private static final JsonParseException jpe = new JsonParseException(EXPECTED_EXCEPTION);
private static final IOException ioe = new IOException(EXPECTED_EXCEPTION);
private StandardCoder coder;
@Before
public void setUp() {
coder = new StandardCoder();
}
@Test
public void testEncodeObject() throws Exception {
List<Integer> arr = Arrays.asList(1100, 1110);
assertEquals("[1100,1110]", coder.encode(arr));
// test exception case
coder = spy(new StandardCoder());
when(coder.toJson(arr)).thenThrow(jpe);
assertThatThrownBy(() -> coder.encode(arr)).isInstanceOf(CoderException.class).hasCause(jpe);
}
@Test
public void testEncodeWriterObject() throws Exception {
List<Integer> arr = Arrays.asList(1200, 1210);
StringWriter wtr = new StringWriter();
coder.encode(wtr, arr);
assertEquals("[1200,1210]", wtr.toString());
// test json exception
coder = spy(new StandardCoder());
doThrow(jpe).when(coder).toJson(wtr, arr);
assertThatThrownBy(() -> coder.encode(wtr, arr)).isInstanceOf(CoderException.class).hasCause(jpe);
}
@Test
public void testEncodeOutputStreamObject() throws Exception {
List<Integer> arr = Arrays.asList(1300, 1310);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
coder.encode(stream, arr);
assertEquals("[1300,1310]", stream.toString("UTF-8"));
// test json exception
Writer wtr = new StringWriter();
coder = spy(new StandardCoder());
when(coder.makeWriter(stream)).thenReturn(wtr);
doThrow(jpe).when(coder).toJson(wtr, arr);
assertThatThrownBy(() -> coder.encode(stream, arr)).isInstanceOf(CoderException.class).hasCause(jpe);
// test exception when flushed
wtr = spy(new OutputStreamWriter(stream));
doThrow(ioe).when(wtr).flush();
coder = spy(new StandardCoder());
when(coder.makeWriter(stream)).thenReturn(wtr);
assertThatThrownBy(() -> coder.encode(stream, arr)).isInstanceOf(CoderException.class).hasCause(ioe);
}
@Test
public void testEncodeFileObject() throws Exception {
File file = new File(getClass().getResource(StandardCoder.class.getSimpleName() + ".json").getFile() + "X");
file.deleteOnExit();
List<Integer> arr = Arrays.asList(1400, 1410);
coder.encode(file, arr);
assertEquals("[1400,1410]", new String(Files.readAllBytes(file.toPath()), StandardCharsets.UTF_8));
// test json exception
StringWriter wtr = new StringWriter();
coder = spy(new StandardCoder());
when(coder.makeWriter(file)).thenReturn(wtr);
doThrow(jpe).when(coder).toJson(wtr, arr);
assertThatThrownBy(() -> coder.encode(file, arr)).isInstanceOf(CoderException.class).hasCause(jpe);
// test exception when closed
coder = spy(new StandardCoder());
wtr = spy(new StringWriter());
doThrow(ioe).when(wtr).close();
coder = spy(new StandardCoder());
when(coder.makeWriter(file)).thenReturn(wtr);
assertThatThrownBy(() -> coder.encode(file, arr)).isInstanceOf(CoderException.class).hasCause(ioe);
}
@Test
public void testDecodeStringClass() throws Exception {
String text = "[2200,2210]";
assertEquals(text, coder.decode(text, JsonElement.class).toString());
// test json exception
coder = spy(new StandardCoder());
when(coder.fromJson(text, JsonElement.class)).thenThrow(jpe);
assertThatThrownBy(() -> coder.decode(text, JsonElement.class)).isInstanceOf(CoderException.class)
.hasCause(jpe);
}
@Test
public void testDecodeReaderClass() throws Exception {
String text = "[2300,2310]";
assertEquals(text, coder.decode(new StringReader(text), JsonElement.class).toString());
// test json exception
coder = spy(new StandardCoder());
StringReader rdr = new StringReader(text);
when(coder.fromJson(rdr, JsonElement.class)).thenThrow(jpe);
assertThatThrownBy(() -> coder.decode(rdr, JsonElement.class)).isInstanceOf(CoderException.class).hasCause(jpe);
}
@Test
public void testDecodeInputStreamClass() throws Exception {
String text = "[2400,2410]";
assertEquals(text,
coder.decode(new ByteArrayInputStream(text.getBytes(StandardCharsets.UTF_8)), JsonElement.class)
.toString());
// test json exception
coder = spy(new StandardCoder());
ByteArrayInputStream stream = new ByteArrayInputStream(text.getBytes(StandardCharsets.UTF_8));
StringReader rdr = new StringReader(text);
when(coder.makeReader(stream)).thenReturn(rdr);
when(coder.fromJson(rdr, JsonElement.class)).thenThrow(jpe);
assertThatThrownBy(() -> coder.decode(stream, JsonElement.class)).isInstanceOf(CoderException.class)
.hasCause(jpe);
}
@Test
public void testDecodeFileClass() throws Exception {
File file = new File(getClass().getResource(StandardCoder.class.getSimpleName() + ".json").getFile());
String text = new String(Files.readAllBytes(file.toPath()), StandardCharsets.UTF_8);
assertEquals(text, coder.decode(file, JsonElement.class).toString());
// test FileNotFoundException case
assertThatThrownBy(() -> coder.decode(new File("unknown-file"), JsonElement.class))
.isInstanceOf(CoderException.class).hasCauseInstanceOf(FileNotFoundException.class);
// test json exception
Reader rdr = new StringReader(text);
coder = spy(new StandardCoder());
when(coder.makeReader(file)).thenReturn(rdr);
when(coder.fromJson(rdr, JsonElement.class)).thenThrow(jpe);
assertThatThrownBy(() -> coder.decode(file, JsonElement.class)).isInstanceOf(CoderException.class)
.hasCause(jpe);
// test IOException case
rdr = spy(new FileReader(file));
doThrow(ioe).when(rdr).close();
coder = spy(new StandardCoder());
when(coder.makeReader(file)).thenReturn(rdr);
assertThatThrownBy(() -> coder.decode(file, JsonElement.class)).isInstanceOf(CoderException.class)
.hasCause(ioe);
}
}
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