v8/test/mjsunit/samevalue.js

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// Flags: --expose-natives-as natives
// Test the SameValue internal method.

var obj1 = {x: 10, y: 11, z: "test"};
var obj2 = {x: 10, y: 11, z: "test"};

var sameValue = natives.$sameValue;

assertTrue(sameValue(0, 0));
assertTrue(sameValue(+0, +0));
assertTrue(sameValue(-0, -0));
assertTrue(sameValue(1, 1));
assertTrue(sameValue(2, 2));
assertTrue(sameValue(-1, -1));
assertTrue(sameValue(0.5, 0.5));
assertTrue(sameValue(true, true));
assertTrue(sameValue(false, false));
assertTrue(sameValue(NaN, NaN));
assertTrue(sameValue(null, null));
assertTrue(sameValue("foo", "foo"));
assertTrue(sameValue(obj1, obj1));
// Undefined values.
assertTrue(sameValue());
assertTrue(sameValue(undefined, undefined));

assertFalse(sameValue(0,1));
assertFalse(sameValue("foo", "bar"));
assertFalse(sameValue(obj1, obj2));
assertFalse(sameValue(true, false));

assertFalse(sameValue(obj1, true));
assertFalse(sameValue(obj1, "foo"));
assertFalse(sameValue(obj1, 1));
assertFalse(sameValue(obj1, undefined));
assertFalse(sameValue(obj1, NaN));

assertFalse(sameValue(undefined, true));
assertFalse(sameValue(undefined, "foo"));
assertFalse(sameValue(undefined, 1));
assertFalse(sameValue(undefined, obj1));
assertFalse(sameValue(undefined, NaN));

assertFalse(sameValue(NaN, true));
assertFalse(sameValue(NaN, "foo"));
assertFalse(sameValue(NaN, 1));
assertFalse(sameValue(NaN, obj1));
assertFalse(sameValue(NaN, undefined));

assertFalse(sameValue("foo", true));
assertFalse(sameValue("foo", 1));
assertFalse(sameValue("foo", obj1));
assertFalse(sameValue("foo", undefined));
assertFalse(sameValue("foo", NaN));

assertFalse(sameValue(true, 1));
assertFalse(sameValue(true, obj1));
assertFalse(sameValue(true, undefined));
assertFalse(sameValue(true, NaN));
assertFalse(sameValue(true, "foo"));

assertFalse(sameValue(1, true));
assertFalse(sameValue(1, obj1));
assertFalse(sameValue(1, undefined));
assertFalse(sameValue(1, NaN));
assertFalse(sameValue(1, "foo"));

// Special string cases.
assertFalse(sameValue("1", 1));
assertFalse(sameValue("true", true));
assertFalse(sameValue("false", false));
assertFalse(sameValue("undefined", undefined));
assertFalse(sameValue("NaN", NaN));

// -0 and +0 are should be different
assertFalse(sameValue(+0, -0));
assertFalse(sameValue(-0, +0));