054_truthy.xml

<?xml version="1.0" encoding="utf-8" ?>
<!--
/*****************************************************************************
 *
 * ReoScript - .NET Script Language Engine
 *
 * https://github.com/unvell/ReoScript
 *
 * THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
 * KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
 * PURPOSE.
 *
 * This software released under MIT license.
 * Copyright (c) 2012-2019 Jingwood, unvell.com, all rights reserved.
 *
 ****************************************************************************/
-->

<test-suite id="054" name="truthy">

  <test-case id="001" name="if truthy values">
    <script>
      var t = debug.assert;

      var result = false;
      if (1) result = true;
      t(result == true);

      result = false;
      if ("hello") result = true;
      t(result == true);

      result = false;
      var obj = {};
      if (obj) result = true;
      t(result == true);

      result = false;
      if (-1) result = true;
      t(result == true);

      result = false;
      if (0.5) result = true;
      t(result == true);
    </script>
  </test-case>

  <test-case id="002" name="if falsy values">
    <script>
      var t = debug.assert;

      var result = true;
      if (0) result = false;
      t(result == true);

      result = true;
      if (null) result = false;
      t(result == true);

      result = true;
      if ("") result = false;
      t(result == true);
    </script>
  </test-case>

  <test-case id="003" name="not operator truthy">
    <script>
      var t = debug.assert;

      t(!null == true);
      t(!0 == true);
      t(!"" == true);

      t(!1 == false);
      t(!"hello" == false);
      t(!{} == false);
    </script>
  </test-case>

  <test-case id="004" name="logical or default value">
    <script>
      var t = debug.assert;

      var a = null;
      var b = a || "default";
      t(b, "default");

      var c = "value";
      var d = c || "default";
      t(d, "value");

      var e = 0;
      var f = e || 42;
      t(f, 42);
    </script>
  </test-case>

  <test-case id="005" name="logical and short-circuit">
    <script>
      var t = debug.assert;

      var a = null;
      var b = a &amp;&amp; "hello";
      t(b == null);

      var c = "value";
      var d = c &amp;&amp; "hello";
      t(d, "hello");

      var e = 1;
      var f = e &amp;&amp; 42;
      t(f, 42);
    </script>
  </test-case>

  <test-case id="006" name="ternary with truthy">
    <script>
      var t = debug.assert;

      var a = 1 ? "yes" : "no";
      t(a, "yes");

      var b = 0 ? "yes" : "no";
      t(b, "no");

      var c = "str" ? "yes" : "no";
      t(c, "yes");

      var d = null ? "yes" : "no";
      t(d, "no");
    </script>
  </test-case>

  <test-case id="007" name="while with truthy condition">
    <script>
      var t = debug.assert;

      var count = 5;
      var sum = 0;
      while (count) {
        sum += count;
        count--;
      }
      t(sum, 15);
    </script>
  </test-case>

  <test-case id="008" name="for with truthy condition">
    <script>
      var t = debug.assert;

      var sum = 0;
      for (var arr = [1,2,3], i = arr.length; i; i--) {
        sum += arr[i - 1];
      }
      t(sum, 6);
    </script>
  </test-case>

</test-suite>