From f3e2752df3f9815c494cbbc38b04d99b626d8ab9 Mon Sep 17 00:00:00 2001
From: fergald <fergald@gmail.com>
Date: Sat, 24 Aug 2019 17:12:15 +0900
Subject: [PATCH] Support private properties in no-invalid-this
 (babel/eslint-plugin-babel#183)

* add failing test

* support ClassPrivateProperty
---
 .../babel-eslint-plugin/rules/no-invalid-this.js  |  7 ++++---
 .../tests/rules/no-invalid-this.js                | 15 +++++++++++++++
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/eslint/babel-eslint-plugin/rules/no-invalid-this.js b/eslint/babel-eslint-plugin/rules/no-invalid-this.js
index ab12ca5320..994499eaad 100644
--- a/eslint/babel-eslint-plugin/rules/no-invalid-this.js
+++ b/eslint/babel-eslint-plugin/rules/no-invalid-this.js
@@ -5,17 +5,18 @@ const eslint = require('eslint');
 const noInvalidThisRule = new eslint.Linter().getRules().get('no-invalid-this');
 
 module.exports = ruleComposer.filterReports(
-    noInvalidThisRule,    
+    noInvalidThisRule,
     (problem, metadata) => {
         let inClassProperty = false;
         let node = problem.node;
 
         while (node) {
-            if (node.type === "ClassProperty") {
+            if (node.type === "ClassProperty" ||
+                node.type === "ClassPrivateProperty") {
                 inClassProperty = true;
                 return;
             }
-            
+
             node = node.parent;
         }
 
diff --git a/eslint/babel-eslint-plugin/tests/rules/no-invalid-this.js b/eslint/babel-eslint-plugin/tests/rules/no-invalid-this.js
index 3ab5da59c9..e28c77aa5e 100644
--- a/eslint/babel-eslint-plugin/tests/rules/no-invalid-this.js
+++ b/eslint/babel-eslint-plugin/tests/rules/no-invalid-this.js
@@ -602,6 +602,21 @@ const patterns = [
         valid: [NORMAL, USE_STRICT, IMPLIED_STRICT, MODULES],
         invalid: []
     },
+
+    // Class Private Instance Properties.
+    {
+        code: "class A {#a = this.b;};",
+        parserOptions: { ecmaVersion: 6 },
+        valid: [NORMAL, USE_STRICT, IMPLIED_STRICT, MODULES],
+        invalid: []
+    },
+
+    {
+        code: "class A {#a = () => {return this.b;};};",
+        parserOptions: { ecmaVersion: 6 },
+        valid: [NORMAL, USE_STRICT, IMPLIED_STRICT, MODULES],
+        invalid: []
+    },
 ];
 
 const ruleTester = new RuleTester();