Bug 935114 - Node 'os'

lib/node/os.js

@@ -0,0 +1,76 @@
+/* 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/. */
+
+'use strict';
+
+module.metadata = {
+  "stability": "unstable"
+};
+
+const { Cc, Ci } = require('chrome');
+const system = require('../sdk/system');
+const runtime = require('../sdk/system/runtime');
+const oscpu = Cc["@mozilla.org/network/protocol;1?name=http"]
+                 .getService(Ci.nsIHttpProtocolHandler).oscpu;
+const hostname = Cc["@mozilla.org/network/dns-service;1"]
+                 .getService(Ci.nsIDNSService).myHostName;
+const isWindows = system.platform === 'win32';
+const endianness = ((new Uint32Array((new Uint8Array([1,2,3,4])).buffer))[0] === 0x04030201) ? 'LE' : 'BE';
+
+/**
+ * Returns a path to a temp directory
+ */
+exports.tmpdir = () => system.pathFor('TmpD');
+
+/**
+ * Returns the endianness of the architecture: either 'LE' or 'BE'
+ */
+exports.endianness = () => endianness;
+
+/**
+ * Returns hostname of the machine
+ */
+exports.hostname = () => hostname;
+
+/**
+ * Name of the OS type
+ * Possible values:
+ * https://developer.mozilla.org/en/OS_TARGET
+ */
+exports.type = () => runtime.OS;
+
+/**
+ * Name of the OS Platform in lower case string.
+ * Possible values:
+ * https://developer.mozilla.org/en/OS_TARGET
+ */
+exports.platform = () => system.platform;
+
+/**
+ * Type of processor architecture running:
+ * 'arm', 'ia32', 'x86', 'x64'
+ */
+exports.arch = () => system.architecture;
+
+/**
+ * Returns the operating system release.
+ */
+exports.release = () => {
+  let match = oscpu.match(/(\d[\.\d]*)/);
+  return match && match.length > 1 ? match[1] : oscpu;
+};
+
+/**
+ * Returns EOL character for the OS
+ */
+exports.EOL = isWindows ? '\r\n' : '\n';
+
+/**
+ * Returns [0, 0, 0], as this is not implemented.
+ */
+exports.loadavg = () => [0, 0, 0];
+
+['uptime', 'totalmem', 'freemem', 'cpus'].forEach(method => {
+  exports[method] = () => { throw new Error('os.' + method + ' is not supported.'); };
+});

test/test-node-os.js

@@ -0,0 +1,32 @@
+/* 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/. */
+"use strict";
+
+let os = require("node/os");
+let system = require("sdk/system");
+
+exports["test os"] = function (assert) {
+  assert.equal(os.tmpdir(), system.pathFor("TmpD"), "os.tmpdir() matches temp dir");
+  assert.ok(os.endianness() === "BE" || os.endianness() === "LE", "os.endianness is BE or LE");
+
+  assert.ok(~["arm", "ia32", "x86", "x64"].indexOf(os.arch()), "os.arch() returns a proper architecture");
+  assert.ok(os.type().length > 0, "os.type() returns a value");
+  assert.equal(typeof os.type(), "string", "os.type() returns a string");
+  assert.ok(os.platform().length > 0, "os.platform() returns a value");
+  assert.equal(typeof os.platform(), "string", "os.platform() returns a string");
+
+  assert.ok(os.release().length > 0, "os.release() returns a value");
+  assert.equal(typeof os.release(), "string", "os.release() returns a string");
+  assert.ok(os.hostname().length > 0, "os.hostname() returns a value");
+  assert.equal(typeof os.hostname(), "string", "os.hostname() returns a string");
+  assert.ok(os.EOL === "\n" || os.EOL === "\r\n", "os.EOL returns a correct EOL char");
+
+  assert.deepEqual(os.loadavg(), [0, 0, 0], "os.loadavg() returns an array of 0s");
+
+  ["uptime", "totalmem", "freemem", "cpus"].forEach(method => {
+    assert.throws(() => os[method](), "os." + method + " throws");
+  });
+};
+
+require("test").run(exports);