lukecwik commented on a change in pull request #11263: [BEAM-9325] Override
proper write method in UnownedOutputStream
URL: https://github.com/apache/beam/pull/11263#discussion_r401020590
##########
File path:
sdks/java/core/src/test/java/org/apache/beam/sdk/util/UnownedOutputStreamTest.java
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@@ -53,4 +56,22 @@ public void testClosingThrows() throws Exception {
expectedException.expectMessage("Caller does not own the underlying");
os.close();
}
+
+ @Test
+ public void testWrite() throws IOException {
+ ByteArrayOutputStream expected = new ByteArrayOutputStream();
+ ByteArrayOutputStream actual = new ByteArrayOutputStream();
+ UnownedOutputStream osActual = new UnownedOutputStream(actual);
+
+ byte[] data0 = "Hello World!".getBytes(StandardCharsets.UTF_8);
+ byte[] data1 = "Welcome!".getBytes(StandardCharsets.UTF_8);
+
+ expected.write(data0, 0, data0.length);
+ osActual.write(data0, 0, data0.length);
+
+ expected.write(data1, 0, data1.length);
+ osActual.write(data1, 0, data1.length);
+
+ assertArrayEquals(expected.toByteArray(), actual.toByteArray());
Review comment:
This won't actually test that the singular version of the method was called
since if FilteredOutputStream wrote one byte at a time you would still get the
expected result. You'll need to use a mock and validate that `#write(byte[],
int, int)` was called the correct number of times.
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