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"};

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

assertFalse(natives.SameValue(0,1));
assertFalse(natives.SameValue("foo", "bar"));
assertFalse(natives.SameValue(obj1, obj2));
assertFalse(natives.SameValue(true, false));

assertFalse(natives.SameValue(obj1, true));
assertFalse(natives.SameValue(obj1, "foo"));
assertFalse(natives.SameValue(obj1, 1));
assertFalse(natives.SameValue(obj1, undefined));
assertFalse(natives.SameValue(obj1, NaN));

assertFalse(natives.SameValue(undefined, true));
assertFalse(natives.SameValue(undefined, "foo"));
assertFalse(natives.SameValue(undefined, 1));
assertFalse(natives.SameValue(undefined, obj1));
assertFalse(natives.SameValue(undefined, NaN));

assertFalse(natives.SameValue(NaN, true));
assertFalse(natives.SameValue(NaN, "foo"));
assertFalse(natives.SameValue(NaN, 1));
assertFalse(natives.SameValue(NaN, obj1));
assertFalse(natives.SameValue(NaN, undefined));

assertFalse(natives.SameValue("foo", true));
assertFalse(natives.SameValue("foo", 1));
assertFalse(natives.SameValue("foo", obj1));
assertFalse(natives.SameValue("foo", undefined));
assertFalse(natives.SameValue("foo", NaN));

assertFalse(natives.SameValue(true, 1));
assertFalse(natives.SameValue(true, obj1));
assertFalse(natives.SameValue(true, undefined));
assertFalse(natives.SameValue(true, NaN));
assertFalse(natives.SameValue(true, "foo"));

assertFalse(natives.SameValue(1, true));
assertFalse(natives.SameValue(1, obj1));
assertFalse(natives.SameValue(1, undefined));
assertFalse(natives.SameValue(1, NaN));
assertFalse(natives.SameValue(1, "foo"));

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

// -0 and +0 are should be different
assertFalse(natives.SameValue(+0, -0));
assertFalse(natives.SameValue(-0, +0));