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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;
import static com.google.common.truth.Truth.assertThat;
import com.google.common.testing.EqualsTester;
import io.opencensus.trace.Tracestate.Entry;
import java.util.Arrays;
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 Tracestate}. */
@RunWith(JUnit4.class)
public class TracestateTest {
private static final String FIRST_KEY = "key_1";
private static final String SECOND_KEY = "key_2";
private static final String FIRST_VALUE = "value.1";
private static final String SECOND_VALUE = "value.2";
@Rule public final ExpectedException thrown = ExpectedException.none();
private static final Tracestate EMPTY = new Tracestate.Builder().build();
private final Tracestate firstTracestate = EMPTY.toBuilder().set(FIRST_KEY, FIRST_VALUE).build();
private final Tracestate secondTracestate =
EMPTY.toBuilder().set(SECOND_KEY, SECOND_VALUE).build();
private final Tracestate multiValueTracestate =
EMPTY.toBuilder().set(FIRST_KEY, FIRST_VALUE).set(SECOND_KEY, SECOND_VALUE).build();
@Test
public void get() {
assertThat(firstTracestate.get(FIRST_KEY)).isEqualTo(FIRST_VALUE);
assertThat(secondTracestate.get(SECOND_KEY)).isEqualTo(SECOND_VALUE);
assertThat(multiValueTracestate.get(FIRST_KEY)).isEqualTo(FIRST_VALUE);
assertThat(multiValueTracestate.get(SECOND_KEY)).isEqualTo(SECOND_VALUE);
}
@Test
public void getEntries() {
assertThat(firstTracestate.getEntries()).containsExactly(Entry.create(FIRST_KEY, FIRST_VALUE));
assertThat(secondTracestate.getEntries())
.containsExactly(Entry.create(SECOND_KEY, SECOND_VALUE));
assertThat(multiValueTracestate.getEntries())
.containsExactly(
Entry.create(FIRST_KEY, FIRST_VALUE), Entry.create(SECOND_KEY, SECOND_VALUE));
}
@Test
public void disallowsNullKey() {
thrown.expect(NullPointerException.class);
EMPTY.toBuilder().set(null, FIRST_VALUE).build();
}
@Test
public void invalidFirstKeyCharacter() {
thrown.expect(IllegalArgumentException.class);
EMPTY.toBuilder().set("1_key", FIRST_VALUE).build();
}
@Test
public void invalidKeyCharacters() {
thrown.expect(IllegalArgumentException.class);
EMPTY.toBuilder().set("kEy_1", FIRST_VALUE).build();
}
@Test
public void invalidKeySize() {
char[] chars = new char[257];
Arrays.fill(chars, 'a');
String longKey = new String(chars);
thrown.expect(IllegalArgumentException.class);
EMPTY.toBuilder().set(longKey, FIRST_VALUE).build();
}
@Test
public void allAllowedKeyCharacters() {
StringBuilder stringBuilder = new StringBuilder();
for (char c = 'a'; c <= 'z'; c++) {
stringBuilder.append(c);
}
for (char c = '0'; c <= '9'; c++) {
stringBuilder.append(c);
}
stringBuilder.append('_');
stringBuilder.append('-');
stringBuilder.append('*');
stringBuilder.append('/');
String allowedKey = stringBuilder.toString();
assertThat(EMPTY.toBuilder().set(allowedKey, FIRST_VALUE).build().get(allowedKey))
.isEqualTo(FIRST_VALUE);
}
@Test
public void disallowsNullValue() {
thrown.expect(NullPointerException.class);
EMPTY.toBuilder().set(FIRST_KEY, null).build();
}
@Test
public void valueCannotContainEqual() {
thrown.expect(IllegalArgumentException.class);
EMPTY.toBuilder().set(FIRST_KEY, "my_vakue=5").build();
}
@Test
public void valueCannotContainComma() {
thrown.expect(IllegalArgumentException.class);
EMPTY.toBuilder().set(FIRST_KEY, "first,second").build();
}
@Test
public void valueCannotContainTrailingSpaces() {
thrown.expect(IllegalArgumentException.class);
EMPTY.toBuilder().set(FIRST_KEY, "first ").build();
}
@Test
public void invalidValueSize() {
char[] chars = new char[257];
Arrays.fill(chars, 'a');
String longValue = new String(chars);
thrown.expect(IllegalArgumentException.class);
EMPTY.toBuilder().set(FIRST_KEY, longValue).build();
}
@Test
public void allAllowedValueCharacters() {
StringBuilder stringBuilder = new StringBuilder();
for (char c = ' ' /* '\u0020' */; c <= '~' /* '\u007E' */; c++) {
if (c == ',' || c == '=') {
continue;
}
stringBuilder.append(c);
}
String allowedValue = stringBuilder.toString();
assertThat(EMPTY.toBuilder().set(FIRST_KEY, allowedValue).build().get(FIRST_KEY))
.isEqualTo(allowedValue);
}
@Test
public void addEntry() {
assertThat(firstTracestate.toBuilder().set(SECOND_KEY, SECOND_VALUE).build())
.isEqualTo(multiValueTracestate);
}
@Test
public void updateEntry() {
assertThat(firstTracestate.toBuilder().set(FIRST_KEY, SECOND_VALUE).build().get(FIRST_KEY))
.isEqualTo(SECOND_VALUE);
Tracestate updatedMultiValueTracestate =
multiValueTracestate.toBuilder().set(FIRST_KEY, SECOND_VALUE).build();
assertThat(updatedMultiValueTracestate.get(FIRST_KEY)).isEqualTo(SECOND_VALUE);
assertThat(updatedMultiValueTracestate.get(SECOND_KEY)).isEqualTo(SECOND_VALUE);
}
@Test
public void addAndUpdateEntry() {
assertThat(
firstTracestate
.toBuilder()
.set(FIRST_KEY, SECOND_VALUE) // update the existing entry
.set(SECOND_KEY, FIRST_VALUE) // add a new entry
.build()
.getEntries())
.containsExactly(
Entry.create(FIRST_KEY, SECOND_VALUE), Entry.create(SECOND_KEY, FIRST_VALUE));
}
@Test
public void addSameKey() {
assertThat(
EMPTY
.toBuilder()
.set(FIRST_KEY, SECOND_VALUE) // update the existing entry
.set(FIRST_KEY, FIRST_VALUE) // add a new entry
.build()
.getEntries())
.containsExactly(Entry.create(FIRST_KEY, FIRST_VALUE));
}
@Test
public void remove() {
assertThat(multiValueTracestate.toBuilder().remove(SECOND_KEY).build())
.isEqualTo(firstTracestate);
}
@Test
public void addAndRemoveEntry() {
assertThat(
EMPTY
.toBuilder()
.set(FIRST_KEY, SECOND_VALUE) // update the existing entry
.remove(FIRST_KEY) // add a new entry
.build())
.isEqualTo(EMPTY);
}
@Test
public void remove_NullNotAllowed() {
thrown.expect(NullPointerException.class);
multiValueTracestate.toBuilder().remove(null).build();
}
@Test
public void tracestate_EqualsAndHashCode() {
EqualsTester tester = new EqualsTester();
tester.addEqualityGroup(EMPTY, EMPTY);
tester.addEqualityGroup(firstTracestate, EMPTY.toBuilder().set(FIRST_KEY, FIRST_VALUE).build());
tester.addEqualityGroup(
secondTracestate, EMPTY.toBuilder().set(SECOND_KEY, SECOND_VALUE).build());
tester.testEquals();
}
@Test
public void tracestate_ToString() {
assertThat(EMPTY.toString()).isEqualTo("Tracestate{entries=[]}");
}
}
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