microsoft#667 Error setting resourceFile: "Maximum call stack size exceeded" (microsoft#773)

* microsoft#667 Error setting resourceFile: "Maximum call stack size exceeded"

 + Preventing the infinite recustion by not translating warning about missing translation.

* Wrong variable in warning output.

- Getting rid of unnecessary escaping backslash

* Bumping package version

* Missing Localization test using mockery

The missing file lib.json is simulated via resporting nonexistent file via mockery.

Co-authored-by: Martin Šimek <martin.simek@digiteqautomotive.com>
Co-authored-by: Anatoly Bolshakov <anatoly.bolshakov@akvelon.com>

Author: 3 people

node/internal.ts

@@ -200,10 +200,10 @@ export function _loc(key: string, ...param: any[]): string {
     }
     else {
         if (Object.keys(_resourceFiles).length <= 0) {
-            _warning(_loc('LIB_ResourceFileNotSet', key));
+            _warning(`Resource file haven't been set, can't find loc string for key: ${key}`);
         }
         else {
-            _warning(_loc('LIB_LocStringNotFound', key));
+            _warning(`Can't find loc string for key: ${key}`);
         }
 
         locString = key;

node/package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "azure-pipelines-task-lib",
-  "version": "3.1.9",
+  "version": "3.1.10",
   "description": "Azure Pipelines Task SDK",
   "main": "./task.js",
   "typings": "./task.d.ts",

node/package.json

@@ -7,6 +7,7 @@ import * as path from 'path';
 import * as testutil from './testutil';
 import * as tl from '../_build/task';
 import * as im from '../_build/internal';
+import * as mockery from 'mockery'
 
 describe('Internal Path Helper Tests', function () {
 
@@ -401,4 +402,32 @@ describe('Internal Path Helper Tests', function () {
 
         done();
     });
+    
+    it('ReportMissingStrings', (done: MochaDone) => {
+
+        mockery.registerAllowable('../_build/internal')
+        const fsMock = {
+            statSync: function (path) { return null; }
+        };
+        mockery.registerMock('fs', fsMock);
+        mockery.enable({ useCleanCache: true })
+
+        const local_im = require('../_build/internal');
+
+        try{
+            const localizedMessage : string = local_im._loc("gizmo", "whatever", "music");
+            assert.strictEqual(localizedMessage, "gizmo whatever music");
+
+        }finally{
+            mockery.disable();
+            mockery.deregisterAll();
+        }
+        done();
+    });
+
+    it('ReportMissingLocalization', (done: MochaDone) => {
+        const localizedMessage : string = im._loc("gizmo", "whatever", "music");
+        assert.strictEqual(localizedMessage, "gizmo whatever music");
+        done();
+    });
 });