src/v8/test/mjsunit/compiler/this-property-refs.js

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// Test references to properties of this.
function Test() {
  this.a = 0;
  this.b = 1;
  this.c = 2;
  this.d = 3;
}

Test.prototype.test0 = function () {
  this.a = this.b;
};

Test.prototype.test1 = function() {
  this.a = this.b = this.c;
};

Test.prototype.test2 = function() {
  this.c = this.d;
  this.b = this.c;
  this.a = this.b;
};

var t = new Test();

t.test0();
assertEquals(1, t.a);

t.test1();
assertEquals(2, t.a);
assertEquals(2, t.b);

t.test2();
assertEquals(3, t.a);
assertEquals(3, t.b);
assertEquals(3, t.c);