/* appjet:version 0.1 */
/* appjet:library */
// Copyright (c) 2010, Herbert Vojčík
// Licensed by MIT license (http://www.opensource.org/licenses/mit-license.php)

/**@overview This library contains various utility functions to support unit-testing.
 */

/**
 * Returns stub function that logs arguments called
 * into its property called log and returns retval.
 * Useful primarily for testing.
 */
function stub(retval) {
    var result = function() {
        result.log.push(Array.slice(arguments));
        return retval;
    };
    result.log = [];
    return result;
}

function picker () {
  var args = Array.prototype.slice.call(arguments);
  return function (self) {
    return args.map(function (prop) {
      var ch = prop[0], rest = prop.substring(1);
      return ch === "+" ? +self[rest] : ch === "?" ? !!self[rest] : self[prop];
    });
  };
};

function mockLib(lib, exports) {
  var old = appjet._native.importApp;
  appjet._native.importApp = function () { return exports; };
  try { import({}, lib); } finally { appjet._native.importApp = old; }
}

/* appjet:server */
import("lib-support/jsunit");
var _l = import({}, "lib-support/jsunit-goodies");

// ==== Test cases ====

page.testSuite = [

	function logIsEmptyForNewStub() {
	    var f = _l.stub();
	    assertArrayEquals("Log is not empty array", [], f.log);
	},
	
	function stubIsAFunction() {
	    var f = _l.stub();
	    assertEquals("Stub is not a function", "function", typeof f);
	},
	
	function stubWithoutRetvalReturnsUndefined() {
	    var f = _l.stub();
	    assertEquals("Stub doesn't return undefined", undefined, f(3, "hello"));
	},
	
	function stubWithRetvalReturnsRetval() {
	    var f = _l.stub("world");
	    assertEquals("Stub returns incorrect value", "world", f(3, "hello"));
	},
	
	function stub_CalledMultipleTimes_ReturnsAlwaysRetval_AndLogsArguments() {
	    var f = _l.stub("hi");
	    var r1 = f("hello", 14, "world");
	    assertArrayEquals("Log is incorrect 1", [["hello", 14, "world"]], f.log);
	    var r2 = f("!", f);
	    assertArrayEquals("Log is incorrect 2", [["hello", 14, "world"], ["!", f]], f.log);
	    f();
	    assertArrayEquals("Log is incorrect 3", [["hello", 14, "world"], ["!", f], []], f.log);
	    assertEquals("Stub returns incorrect value 1", "hi", r1);
	    assertEquals("Stub returns incorrect value 2", "hi", r2);
	},
  
  //TODO tests for the rest

];

// ==== Test runner ====
import("lib-support/runner");
runTestsByDefault();