[enzyme] [Refactor] remove most uses of lodash

Author: ljharb

packages/enzyme/package.json

@@ -43,7 +43,8 @@
     "is-number-object": "^1.0.3",
     "is-string": "^1.0.4",
     "is-subset": "^0.1.1",
-    "lodash": "^4.17.4",
+    "lodash.escape": "^4.0.1",
+    "lodash.isequal": "^4.5.0",
     "object-inspect": "^1.6.0",
     "object-is": "^1.0.1",
     "object.assign": "^4.1.0",

packages/enzyme/src/Debug.js

@@ -1,6 +1,4 @@
-import without from 'lodash/without';
-import escape from 'lodash/escape';
-import compact from 'lodash/compact';
+import escape from 'lodash.escape';
 import functionName from 'function.prototype.name';
 import isString from 'is-string';
 import isNumber from 'is-number-object';
@@ -59,7 +57,7 @@ function propString(prop, options) {
 
 function propsString(node, options) {
   const props = propsOfNode(node);
-  const keys = without(Object.keys(props), 'children');
+  const keys = Object.keys(props).filter(x => x !== 'children');
   return keys.map(key => `${key}=${propString(props[key], options)}`).join(' ');
 }
 
@@ -77,7 +75,9 @@ export function debugNode(node, indentLength = 2, options = {}) {
   }
   if (!node) return '';
 
-  const childrenStrs = compact(childrenOfNode(node).map(n => debugNode(n, indentLength, options)));
+  const childrenStrs = childrenOfNode(node)
+    .map(n => debugNode(n, indentLength, options))
+    .filter(Boolean);
   const type = typeName(node);
 
   const props = options.ignoreProps ? '' : propsString(node, options);

packages/enzyme/src/ReactWrapper.js

@@ -1,6 +1,5 @@
 import cheerio from 'cheerio';
 import flat from 'array.prototype.flat';
-import compact from 'lodash/compact';
 
 import {
   containsChildrenSubArray,
@@ -57,7 +56,7 @@ function findWhereUnwrapped(wrapper, predicate, filter = treeFilter) {
  * @returns {ReactWrapper}
  */
 function filterWhereUnwrapped(wrapper, predicate) {
-  return wrapper.wrap(compact(wrapper.getNodesInternal().filter(predicate)));
+  return wrapper.wrap(wrapper.getNodesInternal().filter(predicate).filter(Boolean));
 }
 
 function privateSetNodes(wrapper, nodes) {
@@ -925,8 +924,7 @@ class ReactWrapper {
   flatMap(fn) {
     const nodes = this.getNodesInternal().map((n, i) => fn.call(this, this.wrap(n), i));
     const flattened = flat(nodes, 1);
-    const compacted = compact(flattened);
-    return this.wrap(compacted);
+    return this.wrap(flattened.filter(Boolean));
   }
 
   /**

packages/enzyme/src/ShallowWrapper.js

@@ -1,5 +1,4 @@
 import flat from 'array.prototype.flat';
-import compact from 'lodash/compact';
 import cheerio from 'cheerio';
 
 import {
@@ -61,7 +60,7 @@ function findWhereUnwrapped(wrapper, predicate, filter = treeFilter) {
  * @returns {ShallowWrapper}
  */
 function filterWhereUnwrapped(wrapper, predicate) {
-  return wrapper.wrap(compact(wrapper.getNodesInternal().filter(predicate)));
+  return wrapper.wrap(wrapper.getNodesInternal().filter(predicate).filter(Boolean));
 }
 
 /**
@@ -1129,8 +1128,7 @@ class ShallowWrapper {
   flatMap(fn) {
     const nodes = this.getNodesInternal().map((n, i) => fn.call(this, this.wrap(n), i));
     const flattened = flat(nodes, 1);
-    const compacted = compact(flattened);
-    return this.wrap(compacted);
+    return this.wrap(flattened.filter(Boolean));
   }
 
   /**

packages/enzyme/src/Utils.js

@@ -1,5 +1,5 @@
 /* eslint no-use-before-define: 0 */
-import isEqual from 'lodash/isEqual';
+import isEqual from 'lodash.isequal';
 import is from 'object-is';
 import entries from 'object.entries';
 import functionName from 'function.prototype.name';

packages/enzyme/src/selectors.js

@@ -1,8 +1,6 @@
 import { createParser } from 'rst-selector-parser';
 import values from 'object.values';
-import isEmpty from 'lodash/isEmpty';
 import flat from 'array.prototype.flat';
-import unique from 'lodash/uniq';
 import is from 'object-is';
 import has from 'has';
 import {
@@ -42,6 +40,10 @@ const PREFIX_ATTRIBUTE_OPERATOR = '^=';
 const SUFFIX_ATTRIBUTE_OPERATOR = '$=';
 const SUBSTRING_ATTRIBUTE_OPERATOR = '*=';
 
+function unique(arr) {
+  return [...new Set(arr)];
+}
+
 /**
  * Calls reduce on a array of nodes with the passed
  * function, returning only unique results.
@@ -260,7 +262,7 @@ export function buildPredicate(selector) {
   }
   // If the selector is an non-empty object, treat the keys/values as props
   if (typeof selector === 'object') {
-    if (!Array.isArray(selector) && selector !== null && !isEmpty(selector)) {
+    if (!Array.isArray(selector) && selector !== null && Object.keys(selector).length > 0) {
       const hasUndefinedValues = values(selector).some(value => typeof value === 'undefined');
       if (hasUndefinedValues) {
         throw new TypeError('Enzyme::Props can’t have `undefined` values. Try using ‘findWhere()’ instead.');