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 644544x 644544x 644544x 312272x 312272x 312272x     312272x 644544x 644544x 4x 4x 4x 39573x 39573x 39573x 39573x 39573x 6x 6x 6x 6x 6x 6x 6x 6x 6x     6x 39573x 39573x 4x 4x 4x 657986x 657986x 657986x 587113x 587113x 587113x     587113x 657986x 657986x 4x 4x 4x 4x       4x 4x 2x 2x 2x 2x 2x 2x 2x 2x 100x     100x 100x 100x 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;
}