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Test Info:
- Manifest: xpcom/tests/unit/xpcshell.toml
/* -*- 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
/* eslint no-unused-vars: ["error", { "varsIgnorePattern": "unusedVariable" }] */
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 unusedVariable = ss.getOutputStream(0);
var inp2 = ss.newInputStream(0);
Assert.equal(inp2.available(), 0);
Assert.ok(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;
} else {
throw ex;
}
}
Assert.ok(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 {
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);
}
Assert.ok(inp.isNonBlocking(), "next test expects a non-blocking stream");
try {
var threw = false;
var bis = BIS(inp);
bis.readByteArray(5);
} catch (e) {
if (e.result != Cr.NS_BASE_STREAM_WOULD_BLOCK) {
do_throw("wrong error thrown: " + e);
}
threw = true;
}
Assert.ok(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);
bos.close();
var inp = ss.newInputStream(0);
var bis = BIS(inp);
var count = 0;
while (count < bytes.length) {
var data = bis.read8(1);
Assert.equal(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;
}