// Does some sanity checks on the stream and returns the number of bytes read // when the checks passed. function test_stream(stream) { // This test only handles blocking streams; that's desired for file streams // anyway. Assert.equal(stream.isNonBlocking(), false);
// Check that the stream is not buffered Assert.equal(
Cc["@mozilla.org/io-util;1"]
.getService(Ci.nsIIOUtil)
.inputStreamIsBuffered(stream), false
);
// Wrap it in a binary stream (to avoid wrong results that // scriptablestream would produce with binary content) var binstream = Cc["@mozilla.org/binaryinputstream;1"].createInstance(
Ci.nsIBinaryInputStream
);
binstream.setInputStream(stream);
var numread = 0; for (;;) { Assert.equal(stream.available(), binstream.available()); var avail = stream.available(); Assert.notEqual(avail, -1);
// PR_UINT32_MAX and PR_INT32_MAX; the files we're testing with aren't that // large. Assert.notEqual(avail, Math.pow(2, 32) - 1); Assert.notEqual(avail, Math.pow(2, 31) - 1);
if (!avail) { // For blocking streams, available() only returns 0 on EOF // Make sure that there is really no data left var could_read = false; try {
binstream.readByteArray(1);
could_read = true;
} catch (e) { // We expect the exception, so do nothing here
} if (could_read) {
do_throw("Data readable when available indicated EOF!");
} return numread;
}
dump("Trying to read " + avail + " bytes\n"); // Note: Verification that this does return as much bytes as we asked for is // done in the binarystream implementation
binstream.readByteArray(avail);
numread += avail;
}
}
function stream_for_file(file) { var str = Cc["@mozilla.org/network/file-input-stream;1"].createInstance(
Ci.nsIFileInputStream
);
str.init(file, PR_RDONLY, 0, 0); return str;
}
function stream_from_channel(file) { var uri = Services.io.newFileURI(file); return NetUtil.newChannel({
uri,
loadUsingSystemPrincipal: true,
}).open();
}
function run_test() { // Get a file and a directory in order to do some testing var file = do_get_file("../unit/data/test_readline6.txt"); var len = file.fileSize; Assert.equal(test_stream(stream_for_file(file)), len); Assert.equal(test_stream(stream_from_channel(file)), len); var dir = file.parent;
test_stream(stream_from_channel(dir)); // Can't do size checking
}
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