Support arrays in t.like() assertion

lib/like-selector.js

@@ -1,8 +1,14 @@
 export function isLikeSelector(selector) {
-	return selector !== null
-		&& typeof selector === 'object'
-		&& Reflect.getPrototypeOf(selector) === Object.prototype
-		&& Reflect.ownKeys(selector).length > 0;
+	const isArrayOrObject = selector !== null && typeof selector === 'object';
+
+	if (!isArrayOrObject) {
+		return false;
+	}
+
+	const isArray = Array.isArray(selector);
+	const minimumKeysRequired = isArray ? 1 : 0;
+
+	return Reflect.ownKeys(selector).length > minimumKeysRequired;
 }
 
 export const CIRCULAR_SELECTOR = new Error('Encountered a circular selector');
@@ -18,7 +24,7 @@ export function selectComparable(lhs, selector, circular = new Set()) {
 		return lhs;
 	}
 
-	const comparable = {};
+	const comparable = Array.isArray(selector) ? [] : {};
 	for (const [key, rhs] of Object.entries(selector)) {
 		if (isLikeSelector(rhs)) {
 			comparable[key] = selectComparable(Reflect.get(lhs, key), rhs, circular);

test-tap/assert.js

@@ -761,6 +761,8 @@ test('.like()', t => {
 		values: [{label: 'Difference (- actual, + expected):', formatted: /{\n-\s*a: 'foo',\n\+\s*a: 'bar',\n\s*}/}],
 	});
 
+	passes(t, () => assertions.like({a: [{a: 1, b: 2}]}, {a: [{a: 1}]}));
+
 	t.end();
 });