[enzyme] [patch] use array.prototype.flat

Author: ljharb

packages/enzyme/src/RSTTraversal.js

@@ -1,4 +1,4 @@
-import flatten from 'lodash/flatten';
+import flat from 'array.prototype.flat';
 import entries from 'object.entries';
 import isSubset from 'is-subset';
 import functionName from 'function.prototype.name';
@@ -9,7 +9,7 @@ export function propsOfNode(node) {
 
 export function childrenOfNode(node) {
   if (!node) return [];
-  return Array.isArray(node.rendered) ? flatten(node.rendered, true) : [node.rendered];
+  return Array.isArray(node.rendered) ? flat(node.rendered, 1) : [node.rendered];
 }
 
 export function hasClassName(node, className) {

packages/enzyme/src/ReactWrapper.js

@@ -1,5 +1,5 @@
 import cheerio from 'cheerio';
-import flatten from 'lodash/flatten';
+import flat from 'array.prototype.flat';
 import compact from 'lodash/compact';
 
 import {
@@ -905,7 +905,7 @@ class ReactWrapper {
    */
   flatMap(fn) {
     const nodes = this.getNodesInternal().map((n, i) => fn.call(this, this.wrap(n), i));
-    const flattened = flatten(nodes, true);
+    const flattened = flat(nodes, 1);
     const compacted = compact(flattened);
     return this.wrap(compacted);
   }

packages/enzyme/src/ShallowWrapper.js

@@ -1,4 +1,4 @@
-import flatten from 'lodash/flatten';
+import flat from 'array.prototype.flat';
 import compact from 'lodash/compact';
 import cheerio from 'cheerio';
 
@@ -1099,7 +1099,7 @@ class ShallowWrapper {
    */
   flatMap(fn) {
     const nodes = this.getNodesInternal().map((n, i) => fn.call(this, this.wrap(n), i));
-    const flattened = flatten(nodes, true);
+    const flattened = flat(nodes, 1);
     const compacted = compact(flattened);
     return this.wrap(compacted);
   }

packages/enzyme/src/selectors.js

@@ -1,7 +1,7 @@
 import { createParser } from 'rst-selector-parser';
 import values from 'object.values';
 import isEmpty from 'lodash/isEmpty';
-import flatten from 'lodash/flatten';
+import flat from 'array.prototype.flat';
 import unique from 'lodash/uniq';
 import is from 'object-is';
 import has from 'has';
@@ -422,5 +422,5 @@ export function reduceTreeBySelector(selector, root) {
 
 export function reduceTreesBySelector(selector, roots) {
   const results = roots.map(n => reduceTreeBySelector(selector, n));
-  return unique(flatten(results));
+  return unique(flat(results, 1));
 }