Add protected keyword to underscore lint rule

packages/tslint-config/CHANGELOG.md

@@ -1,5 +1,10 @@
 # CHANGELOG
 
+## v0.5.0 - _TBD, 2018_
+
+    * Modified custom 'underscore-privates' rule, changing it to 'underscore-private-protected' requiring underscores to be prepended to private variable names
+    * Because our tools can be used in both a TS and JS environment, we want to make the private methods of any public facing interface show up at the bottom of auto-complete lists. Additionally, we wanted to remain consistent with respect to our usage of underscores in order to enforce this rule with a linter rule, rather then manual code reviews.
+
 ## v0.4.0 - _December 28, 2017_
 
     * Added custom 'underscore-privates' rule, requiring underscores to be prepended to private variable names

packages/tslint-config/rules/underscorePrivateAndProtectedRule.ts

@@ -12,7 +12,7 @@ type RelevantClassMember =
 // Copied from: https://github.com/DanielRosenwasser/underscore-privates-tslint-rule
 // The version on github is not published on npm
 export class Rule extends Lint.Rules.AbstractRule {
-    public static FAILURE_STRING = 'private members must be prefixed with an underscore';
+    public static FAILURE_STRING = 'private and protected members must be prefixed with an underscore';
 
     public apply(sourceFile: ts.SourceFile): Lint.RuleFailure[] {
         return this.applyWithFunction(sourceFile, walk);
@@ -54,7 +54,7 @@ function nameStartsWithUnderscore(text: string) {
     return text.charCodeAt(0) === UNDERSCORE.charCodeAt(0);
 }
 function memberIsPrivate(node: ts.Declaration) {
-    return Lint.hasModifier(node.modifiers, ts.SyntaxKind.PrivateKeyword);
+    return Lint.hasModifier(node.modifiers, ts.SyntaxKind.PrivateKeyword, ts.SyntaxKind.ProtectedKeyword);
 }
 function nameIsIdentifier(node: ts.Node): node is ts.Identifier {
     return node.kind === ts.SyntaxKind.Identifier;

packages/tslint-config/tslint.json

@@ -73,7 +73,7 @@
         ],
         "space-within-parens": false,
         "type-literal-delimiter": true,
-        "underscore-privates": true,
+        "underscore-private-and-protected": true,
         "variable-name": [true, "ban-keywords", "allow-pascal-case"],
         "whitespace": [
             true,