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// Ensure inlined subarray() checks for detached buffers.
function testDetached() {
var ab = new ArrayBuffer(10);
var ta = new Int8Array(ab);
for (var i = 0; i <= 100; ++i) {
if (i === 100) {
detachArrayBuffer(ab);
}
try {
var r = ta.subarray();
assertEq(r.length, ta.length);
} catch (e) {
assertEq(e.name, "TypeError");
assertEq(i, 100);
}
}
}
testDetached();
// Ensure shape guard to handle own "constructor" property.
function testShapeForOwnConstructor() {
var ta = new Int8Array(10);
for (var i = 0; i <= 100; ++i) {
if (i === 100) {
ta.constructor = Uint8Array;
}
var r = ta.subarray();
assertEq(r.length, ta.length);
assertEq(r.constructor, i < 100 ? Int8Array : Uint8Array);
}
}
testShapeForOwnConstructor();
// Ensure shape guard to handle expected prototype.
function testShapeForPrototype() {
var ta = new Int8Array(10);
for (var i = 0; i <= 100; ++i) {
if (i === 100) {
Object.setPrototypeOf(ta, Uint8Array.prototype);
}
var r = ta.subarray();
assertEq(r.length, ta.length);
assertEq(r.constructor, i < 100 ? Int8Array : Uint8Array);
}
}
testShapeForPrototype();
// Ensure fuse guard for "OptimizeTypedArraySpeciesFuse".
function testFuse() {
var ta = new Int8Array(10);
// Fuse is intact.
assertEq(getFuseState().OptimizeTypedArraySpeciesFuse.intact, true);
for (var i = 0; i <= 100; ++i) {
if (i === 100) {
Int8Array.prototype.constructor = Uint8Array;
}
var r = ta.subarray();
assertEq(r.length, ta.length);
assertEq(r.constructor, i < 100 ? Int8Array : Uint8Array);
}
// Fuse was popped.
assertEq(getFuseState().OptimizeTypedArraySpeciesFuse.intact, false);
}
// Test in a new global to avoid invalidating the fuse of the current realm.
newGlobal().eval(`(${testFuse})()`);
// Ensure fuse of the current realm still intact.
assertEq(getFuseState().OptimizeTypedArraySpeciesFuse.intact, true);
// Ensure non-integer start index is correctly handled.
function testStartIndexNonInteger() {
var ta = new Int8Array(10);
for (var i = 0; i <= 100; ++i) {
// ToInteger(1.5) = 1
var start = [0, 1.5][(i === 100)|0];
var r = ta.subarray(start);
assertEq(r.length, ta.length - ((i === 100)|0));
}
}
testStartIndexNonInteger();
// Ensure non-integer end index is correctly handled.
function testEndIndexNonInteger() {
var ta = new Int8Array(10);
for (var i = 0; i <= 100; ++i) {
// ToInteger(6.5) = 6.
var end = [5, 6.5][(i === 100)|0];
var r = ta.subarray(0, end);
assertEq(r.length, ta.length - 5 + ((i === 100)|0));
}
}
testEndIndexNonInteger();