зеркало из https://github.com/mozilla/gecko-dev.git
90 строки
3.0 KiB
JavaScript
90 строки
3.0 KiB
JavaScript
// Tests bug 304414
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const PR_RDONLY = 0x1; // see prio.h
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function getDir(key) {
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var dirSvc = Components.classes["@mozilla.org/file/directory_service;1"]
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.getService(Components.interfaces.nsIProperties);
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return dirSvc.get(key, Components.interfaces.nsILocalFile);
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}
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// Does some sanity checks on the stream and returns the number of bytes read
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// when the checks passed.
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function test_stream(stream) {
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// This test only handles blocking streams; that's desired for file streams
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// anyway.
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do_check_eq(stream.isNonBlocking(), false);
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// Check that the stream is not buffered
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do_check_eq(Components.classes["@mozilla.org/io-util;1"]
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.getService(Components.interfaces.nsIIOUtil)
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.inputStreamIsBuffered(stream),
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false);
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// Wrap it in a binary stream (to avoid wrong results that
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// scriptablestream would produce with binary content)
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var binstream = Components.classes['@mozilla.org/binaryinputstream;1']
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.createInstance(Components.interfaces.nsIBinaryInputStream);
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binstream.setInputStream(stream);
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var numread = 0;
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for (;;) {
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do_check_eq(stream.available(), binstream.available());
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var avail = stream.available();
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do_check_neq(avail, -1);
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// PR_UINT32_MAX and PR_INT32_MAX; the files we're testing with aren't that
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// large.
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do_check_neq(avail, Math.pow(2, 32) - 1);
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do_check_neq(avail, Math.pow(2, 31) - 1);
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if (!avail) {
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// For blocking streams, available() only returns 0 on EOF
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// Make sure that there is really no data left
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var could_read = false;
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try {
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binstream.readByteArray(1);
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could_read = true;
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} catch (e) {
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// We expect the exception, so do nothing here
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}
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if (could_read)
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do_throw("Data readable when available indicated EOF!");
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return numread;
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}
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dump("Trying to read " + avail + " bytes\n");
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// Note: Verification that this does return as much bytes as we asked for is
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// done in the binarystream implementation
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var data = binstream.readByteArray(avail);
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numread += avail;
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}
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return numread;
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}
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function stream_for_file(file) {
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var str = Components.classes["@mozilla.org/network/file-input-stream;1"]
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.createInstance(Components.interfaces.nsIFileInputStream);
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str.init(file, PR_RDONLY, 0, 0);
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return str;
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}
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function stream_from_channel(file) {
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var ios = Components.classes["@mozilla.org/network/io-service;1"]
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.getService(Components.interfaces.nsIIOService);
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var uri = ios.newFileURI(file);
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return ios.newChannelFromURI(uri).open();
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}
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function run_test() {
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// Get a file and a directory in order to do some testing
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var file = getDir("XpcomLib");
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var len = file.fileSize;
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do_check_eq(test_stream(stream_for_file(file)), len);
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do_check_eq(test_stream(stream_from_channel(file)), len);
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var dir = file.parent;
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test_stream(stream_from_channel(dir)); // Can't do size checking
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}
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