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/*
* Copyright 2018, OpenCensus Authors
*
* 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 io.opencensus.trace.internal;
import static com.google.common.truth.Truth.assertThat;
import java.nio.charset.Charset;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Unit tests for {@link LowerCaseBase16Encoding}. */
@RunWith(JUnit4.class)
public class LowerCaseBase16EncodingTest {
private static final Charset CHARSET = Charset.forName("UTF-8");
@Rule public ExpectedException thrown = ExpectedException.none();
@Test
public void valid_EncodeDecode() {
testEncoding("", "");
testEncoding("f", "66");
testEncoding("fo", "666f");
testEncoding("foo", "666f6f");
testEncoding("foob", "666f6f62");
testEncoding("fooba", "666f6f6261");
testEncoding("foobar", "666f6f626172");
}
@Test
public void invalidDecodings_UnrecongnizedCharacters() {
// These contain bytes not in the decoding.
thrown.expect(IllegalArgumentException.class);
thrown.expectMessage("Invalid character g");
LowerCaseBase16Encoding.decodeToBytes("efhg");
}
@Test
public void invalidDecodings_InvalidInputLength() {
// Valid base16 strings always have an even length.
thrown.expect(IllegalArgumentException.class);
thrown.expectMessage("Invalid input length 3");
LowerCaseBase16Encoding.decodeToBytes("abc");
}
@Test
public void invalidDecodings_InvalidInputLengthAndCharacter() {
// These have a combination of invalid length and unrecognized characters.
thrown.expect(IllegalArgumentException.class);
thrown.expectMessage("Invalid input length 1");
LowerCaseBase16Encoding.decodeToBytes("?");
}
private static void testEncoding(String decoded, String encoded) {
testEncodes(decoded, encoded);
testDecodes(encoded, decoded);
}
private static void testEncodes(String decoded, String encoded) {
assertThat(LowerCaseBase16Encoding.encodeToString(decoded.getBytes(CHARSET)))
.isEqualTo(encoded);
}
private static void testDecodes(String encoded, String decoded) {
assertThat(LowerCaseBase16Encoding.decodeToBytes(encoded)).isEqualTo(decoded.getBytes(CHARSET));
}
}
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