test_binarystream_systemprincipal.js

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/* Any copyright is dedicated to the Public Domain.

   http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

// The system principal is the only component that is both a singleton and

// serializable, and we support reading it from legacy principals, so make sure

// that it works with nsBinaryInputStream::ReadObject.

// We can't use SystemPrincipal::Write() directly because it does a release

// assert, so this test synthesizes what WriteCompoundObject used to emit: the

// CID, the IID, and nothing else.

add_task(function test_read_legacy_system_principal() {

  // Set up the streams.

  let pipe = Cc["@mozilla.org/pipe;1"].createInstance(Ci.nsIPipe);

  pipe.init(false, false, 0, 0, null);

  let output = Cc["@mozilla.org/binaryoutputstream;1"].createInstance(

    Ci.nsIObjectOutputStream

);

  output.setOutputStream(pipe.outputStream);

  let input = Cc["@mozilla.org/binaryinputstream;1"].createInstance(

    Ci.nsIObjectInputStream

);

  input.setInputStream(pipe.inputStream);

  // Write out the data.

  let registrar = Components.manager.QueryInterface(Ci.nsIComponentRegistrar);

  output.writeID(registrar.contractIDToCID("@mozilla.org/systemprincipal;1"));

  output.writeID(Ci.nsIPrincipal);

  // Deserialize and validate.

  let principal = input.readObject(true);

  let systemPrincipal = Services.scriptSecurityManager.getSystemPrincipal();

  Assert.ok(principal, "Deserialized a legacy system principal");

  Assert.ok(principal.isSystemPrincipal, "It is the system principal");

  Assert.ok(

    principal.equals(systemPrincipal),

    "equals the real system principal"

);

  Assert.equal(

    principal,

    systemPrincipal,

    "equal to the real system principal"

);

});