refactor: private namespaces ExecLimit

.eslintrc.js

@@ -4,5 +4,8 @@ module.exports = {
   plugins: ['you-dont-need-lodash-underscore'],
   rules: {
     'import/no-extraneous-dependencies': 'off'
+  },
+  env: {
+    node: true
   }
 }

src/.eslintrc.js

@@ -4,5 +4,8 @@ module.exports = {
   plugins: ['you-dont-need-lodash-underscore'],
   rules: {
     'import/no-extraneous-dependencies': 'off'
+  },
+  env: {
+    node: true
   }
 }

src/ExecLimit.js

@@ -1,21 +1,23 @@
 module.exports = class ExecLimit {
-  constructor () {
-    this.namespaces = Object.create(null)
+  #namespaces = Object.create(null)
+
+  get namespacesCount () {
+    return Object.keys(this.#namespaces).length
   }
 
   clear (namespace) {
     if (namespace) {
-      delete this.namespaces[namespace]
+      delete this.#namespaces[namespace]
     } else {
-      this.namespaces = Object.create(null)
+      this.#namespaces = Object.create(null)
     }
   }
 
   getHistory (namespace) {
-    if (!this.namespaces[namespace]) {
-      this.namespaces[namespace] = new Set()
+    if (!this.#namespaces[namespace]) {
+      this.#namespaces[namespace] = new Set()
     }
-    return this.namespaces[namespace]
+    return this.#namespaces[namespace]
   }
 
   isExeced (key, namespace) {

src/ExecLimit.test.js

@@ -21,13 +21,13 @@ describe('ExecLimit', () => {
     expect(results.length).toBeGreaterThanOrEqual(15)
 
     execLimit.exec('test', () => {}, 'test')
-    expect(execLimit.namespaces.default.size).toEqual(1)
-    expect(execLimit.namespaces.test.size).toEqual(1)
-    expect(Object.keys(execLimit.namespaces).length).toEqual(2)
+    expect(execLimit.getHistory('default').size).toEqual(1)
+    expect(execLimit.getHistory('test').size).toEqual(1)
+    expect(execLimit.namespacesCount).toEqual(2)
     execLimit.clear('default')
-    expect(execLimit.namespaces.test.size).toEqual(1)
-    expect(Object.keys(execLimit.namespaces).length).toEqual(1)
+    expect(execLimit.getHistory('test').size).toEqual(1)
+    expect(execLimit.namespacesCount).toEqual(1)
     execLimit.clear()
-    expect(Object.keys(execLimit.namespaces).length).toEqual(0)
+    expect(execLimit.namespacesCount).toEqual(0)
   })
 })