All files / src/internal/client/dev equality.js

81.37% Statements 83/102
60% Branches 9/15
71.42% Functions 5/7
81% Lines 81/100

Press n or j to go to the next uncovered block, b, p or k for the previous block.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 1012x 2x 2x 2x 4x 4x 4x 4x 4x 4x     4x 4x 4x 4x 626125x 626125x 626125x 304771x 304771x 304771x     304771x 626125x 626125x 4x 4x 4x 38950x 38950x 38950x 38950x 38950x 6x 6x 6x 6x 6x 6x 6x 6x 6x     6x 38950x 38950x 4x 4x 4x 656811x 656811x 656811x 580058x 580058x 580058x     580058x 656811x 656811x 4x 4x 4x 4x       4x 4x 2x 2x 2x 2x 2x 2x 2x 2x 18x     18x 18x 18x 2x 2x 2x 2x 2x 2x 2x 2x              
import * as w from '../warnings.js';
import { get_proxied_value } from '../proxy.js';
 
export function init_array_prototype_warnings() {
	const array_prototype = Array.prototype;
	// The REPL ends up here over and over, and this prevents it from adding more and more patches
	// of the same kind to the prototype, which would slow down everything over time.
	// @ts-expect-error
	const cleanup = Array.__svelte_cleanup;
	if (cleanup) {
		cleanup();
	}
 
	const { indexOf, lastIndexOf, includes } = array_prototype;
 
	array_prototype.indexOf = function (item, from_index) {
		const index = indexOf.call(this, item, from_index);
 
		if (index === -1) {
			const test = indexOf.call(get_proxied_value(this), get_proxied_value(item), from_index);
 
			if (test !== -1) {
				w.state_proxy_equality_mismatch('array.indexOf(...)');
			}
		}
 
		return index;
	};
 
	array_prototype.lastIndexOf = function (item, from_index) {
		// we need to specify this.length - 1 because it's probably using something like
		// `arguments` inside so passing undefined is different from not passing anything
		const index = lastIndexOf.call(this, item, from_index ?? this.length - 1);
 
		if (index === -1) {
			// we need to specify this.length - 1 because it's probably using something like
			// `arguments` inside so passing undefined is different from not passing anything
			const test = lastIndexOf.call(
				get_proxied_value(this),
				get_proxied_value(item),
				from_index ?? this.length - 1
			);
 
			if (test !== -1) {
				w.state_proxy_equality_mismatch('array.lastIndexOf(...)');
			}
		}
 
		return index;
	};
 
	array_prototype.includes = function (item, from_index) {
		const has = includes.call(this, item, from_index);
 
		if (!has) {
			const test = includes.call(get_proxied_value(this), get_proxied_value(item), from_index);
 
			if (test) {
				w.state_proxy_equality_mismatch('array.includes(...)');
			}
		}
 
		return has;
	};
 
	// @ts-expect-error
	Array.__svelte_cleanup = () => {
		array_prototype.indexOf = indexOf;
		array_prototype.lastIndexOf = lastIndexOf;
		array_prototype.includes = includes;
	};
}
 
/**
 * @param {any} a
 * @param {any} b
 * @param {boolean} equal
 * @returns {boolean}
 */
export function strict_equals(a, b, equal = true) {
	if ((a === b) !== (get_proxied_value(a) === get_proxied_value(b))) {
		w.state_proxy_equality_mismatch(equal ? '===' : '!==');
	}
 
	return (a === b) === equal;
}
 
/**
 * @param {any} a
 * @param {any} b
 * @param {boolean} equal
 * @returns {boolean}
 */
export function equals(a, b, equal = true) {
	if ((a == b) !== (get_proxied_value(a) == get_proxied_value(b))) {
		w.state_proxy_equality_mismatch(equal ? '==' : '!=');
	}

	return (a == b) === equal;
}