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/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
var Cc = Components.classes;
var Ci = Components.interfaces;
var Cr = Components.results;
function run_test()
{
test1();
test2();
test3();
test4();
}
/**
* Checks that getting an input stream from a storage stream which has never had
* anything written to it throws a not-initialized exception.
*/
function test1()
{
var ss = Cc["@mozilla.org/storagestream;1"]
.createInstance(Ci.nsIStorageStream);
ss.init(1024, 1024, null);
var out = ss.getOutputStream(0);
var inp2 = ss.newInputStream(0);
do_check_eq(inp2.available(), 0);
do_check_true(inp2.isNonBlocking());
var sis =
Cc["@mozilla.org/scriptableinputstream;1"]
.createInstance(Ci.nsIScriptableInputStream);
sis.init(inp2);
var threw = false;
try {
sis.read(1);
} catch (ex if ex.result == Cr.NS_BASE_STREAM_WOULD_BLOCK) {
threw = true;
}
do_check_true(threw);
}
/**
* Checks that getting an input stream from a storage stream to which 0 bytes of
* data have been explicitly written doesn't throw an exception.
*/
function test2()
{
var ss = Cc["@mozilla.org/storagestream;1"]
.createInstance(Ci.nsIStorageStream);
ss.init(1024, 1024, null);
var out = ss.getOutputStream(0);
out.write("", 0);
try
{
var inp2 = ss.newInputStream(0);
}
catch (e)
{
do_throw("shouldn't throw exception when new input stream created");
}
}
/**
* Checks that reading any non-zero amount of data from a storage stream
* which has had 0 bytes written to it explicitly works correctly.
*/
function test3()
{
var ss = Cc["@mozilla.org/storagestream;1"]
.createInstance(Ci.nsIStorageStream);
ss.init(1024, 1024, null);
var out = ss.getOutputStream(0);
out.write("", 0);
try
{
var inp = ss.newInputStream(0);
}
catch (e)
{
do_throw("newInputStream(0) shouldn't throw if write() is called: " + e);
}
do_check_true(inp.isNonBlocking(), "next test expects a non-blocking stream");
try
{
var threw = false;
var bis = BIS(inp);
var dummy = bis.readByteArray(5);
}
catch (e)
{
if (e.result != Cr.NS_BASE_STREAM_WOULD_BLOCK)
do_throw("wrong error thrown: " + e);
threw = true;
}
do_check_true(threw,
"should have thrown (nsStorageInputStream is nonblocking)");
}
/**
* Basic functionality test for storagestream: write data to it, get an input
* stream, and read the data back to see that it matches.
*/
function test4()
{
var bytes = [65, 66, 67, 68, 69, 70, 71, 72, 73, 74];
var ss = Cc["@mozilla.org/storagestream;1"]
.createInstance(Ci.nsIStorageStream);
ss.init(1024, 1024, null);
var outStream = ss.getOutputStream(0);
var bos = Cc["@mozilla.org/binaryoutputstream;1"]
.createInstance(Ci.nsIBinaryOutputStream);
bos.setOutputStream(outStream);
bos.writeByteArray(bytes, bytes.length);
bos.close();
var inp = ss.newInputStream(0);
var bis = BIS(inp);
var count = 0;
while (count < bytes.length)
{
var data = bis.read8(1);
do_check_eq(data, bytes[count++]);
}
var threw = false;
try
{
data = bis.read8(1);
}
catch (e)
{
if (e.result != Cr.NS_ERROR_FAILURE)
do_throw("wrong error thrown: " + e);
threw = true;
}
if (!threw)
do_throw("should have thrown but instead returned: '" + data + "'");
}
function BIS(input)
{
var bis = Cc["@mozilla.org/binaryinputstream;1"]
.createInstance(Ci.nsIBinaryInputStream);
bis.setInputStream(input);
return bis;
}
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