Set helpers #isEqual, adds some test coverage

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.40.0
+
+* Adding `#isEqual` to Set helpers (@mrflip). (provisional)
+
 ## 0.39.2
 
 * Fixing typings of low-level structure consuming methods (@jerome-benoit).

package.json

@@ -5,7 +5,7 @@
   "scripts": {
     "lint": "eslint --cache ./*.js ./utils ./test",
     "lint:fix": "eslint --cache --fix ./*.js ./utils ./test",
-    "prepublishOnly": "npm run lint && npm test && npm run test:types",
+    "prepublishOnly": "npm run lint && npm test && npm run test:types && echo 'Success! All checks passed!'",
     "test": "mocha",
     "test:types": "tsc --target es2015 --noEmit --noImplicitAny --noImplicitReturns ./test/types.ts"
   },
@@ -80,6 +80,7 @@
     "asciitree": "^1.0.2",
     "damerau-levenshtein": "^1.0.7",
     "eslint": "^8.2.0",
+    "eslint-plugin-mocha": "^10.1.0",
     "leven": "^3.1.0",
     "lodash": "^4.17.21",
     "matcha": "^0.7.0",
@@ -90,14 +91,19 @@
     "typescript": "^4.5.2"
   },
   "eslintConfig": {
-    "extends": "@yomguithereal/eslint-config",
+    "extends": [
+      "plugin:mocha/recommended",
+      "@yomguithereal/eslint-config"
+    ],
     "parserOptions": {
       "ecmaVersion": 6,
       "ecmaFeatures": {
         "forOf": true
       }
     },
     "rules": {
+      "mocha/no-identical-title": 0,
+      "mocha/no-setup-in-describe": 0,
       "no-new": 0
     }
   }

set.js

@@ -181,6 +181,33 @@ exports.isSubset = function(A, B) {
   return true;
 };
 
+
+/**
+ * Function returning whether A equals B (same size and B has all elements of A)
+ *
+ * @param  {Set} A - First set.
+ * @param  {Set} B - Second set.
+ * @return {boolean}
+ */
+exports.isEqual = function(A, B) {
+  var iterator = A.values(),
+      step;
+
+  // Shortcuts
+  if (A === B)
+    return true;
+
+  if (A.size !== B.size)
+    return false;
+
+  while ((step = iterator.next(), !step.done)) {
+    if (!B.has(step.value))
+      return false;
+  }
+
+  return true;
+};
+
 /**
  * Function returning whether A is a superset of B.
  *

test/_utils.js

@@ -14,14 +14,14 @@ describe('utils', function() {
   describe('typed-arrays', function() {
 
     describe('#.getPointerArray', function() {
-      var validatePointerArrayConstructor = function (min, max, expectedCtor) {
-        it(`returns ${expectedCtor} for ${min}`, () => {
+      var validatePointerArrayConstructor = function(min, max, expectedCtor) {
+        it(`returns ${expectedCtor} for ${min}`, function() {
           assert.strictEqual(typed.getPointerArray(min), expectedCtor);
         });
-        it(`returns ${expectedCtor} for ${(max - min) / 2}`, () => {
+        it(`returns ${expectedCtor} for ${(max - min) / 2}`, function() {
           assert.strictEqual(typed.getPointerArray((max - min) / 2), expectedCtor);
         });
-        it(`returns ${expectedCtor} for ${max}`, () => {
+        it(`returns ${expectedCtor} for ${max}`, function() {
           assert.strictEqual(typed.getPointerArray(max), expectedCtor);
         });
       };