Merge remote-tracking branch 'aosp/upstream-master' into merge am: dd3cabeacc

am: 6fbc3cf5a1

Change-Id: I11b0ec1cf561d2a14da78e444b1594f167787fe6

1 files changed, 93 insertions, 0 deletions

diff --git a/api/src/test/java/io/opencensus/trace/TraceIdTest.java b/api/src/test/java/io/opencensus/trace/TraceIdTest.java
new file mode 100644
index 00000000..c8b5dc8f
--- /dev/null
+++ b/api/src/test/java/io/opencensus/trace/TraceIdTest.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2016-17, 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 java.util.Arrays;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@link TraceId}. */
+@RunWith(JUnit4.class)
+public class TraceIdTest {
+  private static final byte[] firstBytes =
+      new byte[] {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 'a'};
+  private static final byte[] secondBytes =
+      new byte[] {(byte) 0xFF, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 'A'};
+  private static final TraceId first = TraceId.fromBytes(firstBytes);
+  private static final TraceId second = TraceId.fromBytes(secondBytes);
+
+  @Test
+  public void invalidTraceId() {
+    assertThat(TraceId.INVALID.getBytes()).isEqualTo(new byte[16]);
+  }
+
+  @Test
+  public void isValid() {
+    assertThat(TraceId.INVALID.isValid()).isFalse();
+    assertThat(first.isValid()).isTrue();
+    assertThat(second.isValid()).isTrue();
+  }
+
+  @Test
+  public void getBytes() {
+    assertThat(first.getBytes()).isEqualTo(firstBytes);
+    assertThat(second.getBytes()).isEqualTo(secondBytes);
+  }
+
+  @Test
+  public void fromLowerBase16() {
+    assertThat(TraceId.fromLowerBase16("00000000000000000000000000000000"))
+        .isEqualTo(TraceId.INVALID);
+    assertThat(TraceId.fromLowerBase16("00000000000000000000000000000061")).isEqualTo(first);
+    assertThat(TraceId.fromLowerBase16("ff000000000000000000000000000041")).isEqualTo(second);
+  }
+
+  @Test
+  public void toLowerBase16() {
+    assertThat(TraceId.INVALID.toLowerBase16()).isEqualTo("00000000000000000000000000000000");
+    assertThat(first.toLowerBase16()).isEqualTo("00000000000000000000000000000061");
+    assertThat(second.toLowerBase16()).isEqualTo("ff000000000000000000000000000041");
+  }
+
+  @Test
+  public void traceId_CompareTo() {
+    assertThat(first.compareTo(second)).isGreaterThan(0);
+    assertThat(second.compareTo(first)).isLessThan(0);
+    assertThat(first.compareTo(TraceId.fromBytes(firstBytes))).isEqualTo(0);
+  }
+
+  @Test
+  public void traceId_EqualsAndHashCode() {
+    EqualsTester tester = new EqualsTester();
+    tester.addEqualityGroup(TraceId.INVALID, TraceId.INVALID);
+    tester.addEqualityGroup(first, TraceId.fromBytes(Arrays.copyOf(firstBytes, firstBytes.length)));
+    tester.addEqualityGroup(
+        second, TraceId.fromBytes(Arrays.copyOf(secondBytes, secondBytes.length)));
+    tester.testEquals();
+  }
+
+  @Test
+  public void traceId_ToString() {
+    assertThat(TraceId.INVALID.toString()).contains("00000000000000000000000000000000");
+    assertThat(first.toString()).contains("00000000000000000000000000000061");
+    assertThat(second.toString()).contains("ff000000000000000000000000000041");
+  }
+}