@Test
public void catMoreTextThanFitsInSingleBufferReceivedOnStdout() throws Exception {
ProcessExecutorParams params;
if (Platform.detect() == Platform.WINDOWS) {
params =
ProcessExecutorParams.ofCommand(
"python", "-c", "import sys, shutil; shutil.copyfileobj(sys.stdin, sys.stdout)");
} else {
params = ProcessExecutorParams.ofCommand("cat");
}
ListeningProcessExecutor executor = new ListeningProcessExecutor();
StringBuilder sb = new StringBuilder();
// Use a 3 byte Unicode sequence to ensure writes go across byte buffer
// boundaries, and append it as many times as needed to ensure it doesn't
// fit in a single I/O buffer.
String threeByteUTF8 = "\u2764";
for (int i = 0; i < ListeningProcessExecutor.LaunchedProcess.BUFFER_CAPACITY + 1; i++) {
sb.append(threeByteUTF8);
}
sb.append(String.format("%n"));
String longString = sb.toString();
StdinWritingListener listener = new StdinWritingListener(longString);
ListeningProcessExecutor.LaunchedProcess process = executor.launchProcess(params, listener);
process.wantWrite();
int returnCode = executor.waitForProcess(process);
assertThat(returnCode, equalTo(0));
assertThat(listener.capturedStdout.toString("UTF-8"), equalTo(longString));
assertThat(listener.capturedStderr.toString("UTF-8"), is(emptyString()));
}
@Test
public void catTextSentToStdinReceivedOnStdout() throws Exception {
ProcessExecutorParams params;
if (Platform.detect() == Platform.WINDOWS) {
params =
ProcessExecutorParams.ofCommand(
"python", "-c", "import sys, shutil; shutil.copyfileobj(sys.stdin, sys.stdout)");
} else {
params = ProcessExecutorParams.ofCommand("cat");
}
ListeningProcessExecutor executor = new ListeningProcessExecutor();
StdinWritingListener listener = new StdinWritingListener(String.format("Meow%n"));
ListeningProcessExecutor.LaunchedProcess process = executor.launchProcess(params, listener);
process.wantWrite();
int returnCode = executor.waitForProcess(process);
assertThat(returnCode, equalTo(0));
assertThat(listener.capturedStdout.toString("UTF-8"), equalTo(String.format("Meow%n")));
assertThat(listener.capturedStderr.toString("UTF-8"), is(emptyString()));
}
