Function test_count

deps/v8/test/mjsunit/constant-folding.js:33–70

()

// Test count operations involving constants
function test_count() {
  var x = "foo";
  var y = "3";

  x += x++;  // ++ and -- apply ToNumber to their operand, even for postfix.
  assertEquals(x, "fooNaN", "fooNaN test");
  x = "luft";
  x += ++x;
  assertEquals(x, "luftNaN", "luftNaN test");

  assertTrue(y++ === 3, "y++ === 3, where y = \"3\"");
  y = 3;
  assertEquals(y++, 3, "y++ == 3, where y = 3");
  y = "7.1";
  assertTrue(y++ === 7.1, "y++ === 7.1, where y = \"7.1\"");
  var z = y = x = "9";
  assertEquals( z++ + (++y) + x++, 28, "z++ + (++y) + x++ == 28");
  z = y = x = 13;
  assertEquals( z++ + (++y) + x++, 40, "z++ + (++y) + x++ == 40");
  z = y = x = -5.5;
  assertEquals( z++ + (++y) + x++, -15.5, "z++ + (++y) + x++ == -15.5");

  assertEquals(y, -4.5);
  z = y;
  z++;
  assertEquals(y, -4.5);
  z = y;
  y++;
  assertEquals(z, -4.5);

  y = 20;
  z = y;
  z++;
  assertEquals(y, 20);
  z = y;
  y++;
  assertEquals(z, 20);
}

test_count();