test/mjsunit/math-round.js

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assertEquals(0, Math.round(0));
assertEquals(-0, Math.round(-0));
assertEquals(Infinity, Math.round(Infinity));
assertEquals(-Infinity, Math.round(-Infinity));
assertNaN(Math.round(NaN));

assertEquals(1, Math.round(0.5));
assertEquals(1, Math.round(0.7));
assertEquals(1, Math.round(1));
assertEquals(1, Math.round(1.1));
assertEquals(1, Math.round(1.49999));
assertEquals(1/-0, 1/Math.round(-0.5));  // Test for -0 result.
assertEquals(-1, Math.round(-0.5000000000000001));
assertEquals(-1, Math.round(-0.7));
assertEquals(-1, Math.round(-1));
assertEquals(-1, Math.round(-1.1));
assertEquals(-1, Math.round(-1.49999));
assertEquals(-1, Math.round(-1.5));

assertEquals(9007199254740990, Math.round(9007199254740990));
assertEquals(9007199254740991, Math.round(9007199254740991));
assertEquals(-9007199254740990, Math.round(-9007199254740990));
assertEquals(-9007199254740991, Math.round(-9007199254740991));
assertEquals(Number.MAX_VALUE, Math.round(Number.MAX_VALUE));
assertEquals(-Number.MAX_VALUE, Math.round(-Number.MAX_VALUE));