From 097262f6f800c387724143808e17608c0cced743 Mon Sep 17 00:00:00 2001
From: Cameron Crothers <jprogrammer@gmail.com>
Date: Thu, 7 Mar 2019 03:11:02 +1100
Subject: [PATCH] fix(eslint-plugin): [interface-name-prefix] correct error
 message in always mode (#333)

interface-name-prefix currenlty provides 'Interface name must not be
prefixed with "I".' but when in always mode it should give an error
message that matches the intent, added 'Interface name must be prefixed
with "I".' for when "always" is enabled
---
 packages/eslint-plugin/src/rules/interface-name-prefix.ts    | 5 +++--
 .../eslint-plugin/tests/rules/interface-name-prefix.test.ts  | 4 ++--
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/packages/eslint-plugin/src/rules/interface-name-prefix.ts b/packages/eslint-plugin/src/rules/interface-name-prefix.ts
index 175cbf41c3b..b9c3b91a052 100644
--- a/packages/eslint-plugin/src/rules/interface-name-prefix.ts
+++ b/packages/eslint-plugin/src/rules/interface-name-prefix.ts
@@ -1,7 +1,7 @@
 import * as util from '../util';
 
 type Options = ['never' | 'always'];
-type MessageIds = 'noPrefix';
+type MessageIds = 'noPrefix' | 'alwaysPrefix';
 
 export default util.createRule<Options, MessageIds>({
   name: 'interface-name-prefix',
@@ -15,6 +15,7 @@ export default util.createRule<Options, MessageIds>({
     },
     messages: {
       noPrefix: 'Interface name must not be prefixed with "I".',
+      alwaysPrefix: 'Interface name must be prefixed with "I".',
     },
     schema: [
       {
@@ -51,7 +52,7 @@ export default util.createRule<Options, MessageIds>({
           if (!isPrefixedWithI(node.id.name)) {
             context.report({
               node: node.id,
-              messageId: 'noPrefix',
+              messageId: 'alwaysPrefix',
             });
           }
         }
diff --git a/packages/eslint-plugin/tests/rules/interface-name-prefix.test.ts b/packages/eslint-plugin/tests/rules/interface-name-prefix.test.ts
index d954d160fa9..09cf548c7ac 100644
--- a/packages/eslint-plugin/tests/rules/interface-name-prefix.test.ts
+++ b/packages/eslint-plugin/tests/rules/interface-name-prefix.test.ts
@@ -77,7 +77,7 @@ interface Animal {
       options: ['always'],
       errors: [
         {
-          messageId: 'noPrefix',
+          messageId: 'alwaysPrefix',
           line: 2,
           column: 11,
         },
@@ -92,7 +92,7 @@ interface Iguana {
       options: ['always'],
       errors: [
         {
-          messageId: 'noPrefix',
+          messageId: 'alwaysPrefix',
           line: 2,
           column: 11,
         },