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// Tests for TypedArray#reduce.
for (var constructor of anyTypedArrayConstructors) {
assertEq(constructor.prototype.reduce.length, 1);
// Basic tests.
var arr = new constructor([1, 2, 3, 4, 5]);
assertEq(arr.reduce((previous, current) => previous + current), 15);
assertEq(arr.reduce((previous, current) => current - previous), 3);
var count = 0;
var sum = 0;
assertEq(arr.reduce((previous, current, index, array) => {
count++;
sum += current;
assertEq(current - 1, index);
assertEq(current, arr[index]);
assertEq(array, arr);
return previous * current;
}), 120);
assertEq(count, 4);
assertEq(sum, 14);
// Tests for `initialValue` argument.
assertEq(arr.reduce((previous, current) => previous + current, -15), 0);
assertEq(arr.reduce((previous, current) => previous + current, ""), "12345");
assertDeepEq(arr.reduce((previous, current) => previous.concat(current), []), [1, 2, 3, 4, 5]);
// Tests for `this` value.
var global = this;
arr.reduce(function(){
assertEq(this, global);
});
arr.reduce(function(){
"use strict";
assertEq(this, undefined);
});
arr.reduce(() => assertEq(this, global));
// Throw an exception in the callback.
var count = 0;
var sum = 0;
assertThrowsInstanceOf(() => {
arr.reduce((previous, current, index, array) => {
count++;
sum += current;
if (index === 3) {
throw TypeError("reduce");
}
})
}, TypeError);
assertEq(count, 3);
assertEq(sum, 9);
// There is no callback or callback is not a function.
assertThrowsInstanceOf(() => {
arr.reduce();
}, TypeError);
var invalidCallbacks = [undefined, null, 1, false, "", Symbol(), [], {}, /./];
invalidCallbacks.forEach(callback => {
assertThrowsInstanceOf(() => {
arr.reduce(callback);
}, TypeError);
})
// Callback is a generator.
arr.reduce(function*(){
throw "This line will not be executed";
});
// Called from other globals.
if (typeof newGlobal === "function") {
var reduce = newGlobal()[constructor.name].prototype.reduce;
assertEq(reduce.call(arr, (previous, current) => Math.min(previous, current)), 1);
}
// Throws if `this` isn't a TypedArray.
var invalidReceivers = [undefined, null, 1, false, "", Symbol(), [], {}, /./,
new Proxy(new constructor(3), {})];
invalidReceivers.forEach(invalidReceiver => {
assertThrowsInstanceOf(() => {
constructor.prototype.reduce.call(invalidReceiver, () => {});
}, TypeError, "Assert that reduce fails if this value is not a TypedArray");
});
// Test that the length getter is never called.
assertEq(Object.defineProperty(arr, "length", {
get() {
throw new Error("length accessor called");
}
}).reduce((previous, current) => Math.max(previous, current)), 5);
}
// Tests for TypedArray#reduceRight.
for (var constructor of anyTypedArrayConstructors) {
assertEq(constructor.prototype.reduceRight.length, 1);
// Basic tests.
var arr = new constructor([1, 2, 3, 4, 5]);
assertEq(arr.reduceRight((previous, current) => previous + current), 15);
assertEq(arr.reduceRight((previous, current) => current - previous), 3);
var count = 0;
var sum = 0;
assertEq(arr.reduceRight((previous, current, index, array) => {
count++;
sum += current;
assertEq(current - 1, index);
assertEq(current, arr[index]);
assertEq(array, arr);
return previous * current;
}), 120);
assertEq(count, 4);
assertEq(sum, 10);
// Tests for `initialValue` argument.
assertEq(arr.reduceRight((previous, current) => previous + current, -15), 0);
assertEq(arr.reduceRight((previous, current) => previous + current, ""), "54321");
assertDeepEq(arr.reduceRight((previous, current) => previous.concat(current), []), [5, 4, 3, 2, 1]);
// Tests for `this` value.
var global = this;
arr.reduceRight(function(){
assertEq(this, global);
});
arr.reduceRight(function(){
"use strict";
assertEq(this, undefined);
});
arr.reduceRight(() => assertEq(this, global));
// Throw an exception in the callback.
var count = 0;
var sum = 0;
assertThrowsInstanceOf(() => {
arr.reduceRight((previous, current, index, array) => {
count++;
sum += current;
if (index === 1) {
throw TypeError("reduceRight");
}
})
}, TypeError);
assertEq(count, 3);
assertEq(sum, 9);
// There is no callback or callback is not a function.
assertThrowsInstanceOf(() => {
arr.reduceRight();
}, TypeError);
var invalidCallbacks = [undefined, null, 1, false, "", Symbol(), [], {}, /./];
invalidCallbacks.forEach(callback => {
assertThrowsInstanceOf(() => {
arr.reduceRight(callback);
}, TypeError);
})
// Callback is a generator.
arr.reduceRight(function*(){
throw "This line will not be executed";
});
// Called from other globals.
if (typeof newGlobal === "function") {
var reduceRight = newGlobal()[constructor.name].prototype.reduceRight;
assertEq(reduceRight.call(arr, (previous, current) => Math.min(previous, current)), 1);
}
// Throws if `this` isn't a TypedArray.
var invalidReceivers = [undefined, null, 1, false, "", Symbol(), [], {}, /./,
new Proxy(new constructor(3), {})];
invalidReceivers.forEach(invalidReceiver => {
assertThrowsInstanceOf(() => {
constructor.prototype.reduceRight.call(invalidReceiver, () => {});
}, TypeError, "Assert that reduceRight fails if this value is not a TypedArray");
});
// Test that the length getter is never called.
assertEq(Object.defineProperty(arr, "length", {
get() {
throw new Error("length accessor called");
}
}).reduceRight((previous, current) => Math.max(previous, current)), 5);
}
if (typeof reportCompare === "function")
reportCompare(true, true);
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