Merge "ErrnoException: Add test coverage."
diff --git a/luni/src/test/java/libcore/android/system/ErrnoExceptionTest.java b/luni/src/test/java/libcore/android/system/ErrnoExceptionTest.java
new file mode 100644
index 0000000..59cdb4b
--- /dev/null
+++ b/luni/src/test/java/libcore/android/system/ErrnoExceptionTest.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * 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 libcore.android.system;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import android.system.ErrnoException;
+
+import java.io.IOException;
+import java.net.SocketException;
+
+import static android.system.OsConstants.EBADF;
+import static android.system.OsConstants.EINVAL;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
+
+@RunWith(JUnit4.class)
+public class ErrnoExceptionTest {
+
+ @Test public void messageErrnoAndCause() {
+ // For simplicitly, we hard-code "EINVAL (Invalid argument)" here even though
+ // strictly speaking, those only need to be consistent with errnoName() and
+ // strerror().
+ check_messageErrnoAndCause("null failed: EINVAL (Invalid argument)", null, EINVAL);
+ check_messageErrnoAndCause("name failed: EINVAL (Invalid argument)", "name", EINVAL);
+ check_messageErrnoAndCause("name failed: EBADF (Bad file descriptor)", "name", EBADF);
+ }
+
+ private static void check_messageErrnoAndCause(String msg, String nameOrNull, int errno) {
+ Throwable cause = new Throwable("cause msg");
+ assertMessageErrnoAndCause(msg, errno, null, new ErrnoException(nameOrNull, errno));
+ assertMessageErrnoAndCause(msg, errno, null, new ErrnoException(nameOrNull, errno, null));
+ assertMessageErrnoAndCause(msg, errno, cause, new ErrnoException(nameOrNull, errno, cause));
+ }
+
+ private static void assertMessageErrnoAndCause(String message, int errno, Throwable cause,
+ ErrnoException e) {
+ assertEquals(message, e.getMessage());
+ assertEquals(errno, e.errno);
+ assertEquals(cause, e.getCause());
+ }
+
+ @Test public void rethrow() {
+ check_rethrow(new ErrnoException(null, EINVAL));
+ check_rethrow(new ErrnoException(null, EINVAL, null));
+ check_rethrow(new ErrnoException(null, EINVAL, new Throwable("cause msg")));
+
+ check_rethrow(new ErrnoException("name", EINVAL));
+ check_rethrow(new ErrnoException("name", EINVAL, null));
+ check_rethrow(new ErrnoException("name", EINVAL, new Throwable("cause msg")));
+ }
+
+ private void check_rethrow(ErrnoException cause) {
+ try {
+ cause.rethrowAsIOException();
+ fail();
+ } catch (IOException e) {
+ assertEquals(cause.getMessage(), e.getMessage());
+ assertEquals(cause, e.getCause());
+ assertEquals(IOException.class, e.getClass());
+ }
+
+ try {
+ cause.rethrowAsSocketException();
+ fail();
+ } catch (SocketException e) {
+ assertEquals(cause.getMessage(), e.getMessage());
+ assertEquals(cause, e.getCause());
+ assertEquals(SocketException.class, e.getClass());
+ }
+ }
+}