test/mjsunit/string-compare-alignment.js

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// Test that we can compare two strings that are not 4-byte aligned.
// This situation can arise with sliced strings.  This tests for an ARM bug
// that was fixed in r554.

var base =
    "Now is the time for all good men to come to the aid of the party. " +
    "Now is the time for all good men to come to the aid of the party."
var s1 = base.substring(0, 64);
var s2 = base.substring(66, 130);

var o = new Object();
o[s1] = 1;
o[s2] = 2;

var first_time = true;

for (var x in o) {
  assertTrue(o[x] == 2, "expect 2");
  assertTrue(first_time, "once only");
  first_time = false;
}