Changing test; fixing null check

.github/workflows/test.yml

@@ -19,7 +19,7 @@ jobs:
         vs-version: "[16.4,16.5]"
 
     - name: echo msbuild path
-      run: echo ${{ steps.setup_msbuild.outputs.msbuildPath }}
+      run: echo "${{ steps.setup_msbuild.outputs.msbuildPath }}"
 
     - name: echo vswhere
       run: vswhere.exe

dist/index.js

@@ -1294,7 +1294,7 @@ function run() {
             // check to see if we are using a specific path for vswhere
             let vswhereToolExe = '';
             let cachedToolDirectory = '';
-            if (!VSWHERE_PATH) {
+            if (VSWHERE_PATH) {
                 // specified a path for vswhere, use it and cache the location
                 vswhereToolExe = path.join(VSWHERE_PATH, 'vswhere.exe');
                 cachedToolDirectory = yield toolCache.cacheDir(VSWHERE_PATH, 'vswhere', VSWHERE_VERSION);

src/main.ts

@@ -33,7 +33,7 @@ async function run(): Promise<void> {
     let vswhereToolExe = ''
     let cachedToolDirectory = ''
 
-    if (!VSWHERE_PATH) {
+    if (VSWHERE_PATH) {
       // specified a path for vswhere, use it and cache the location
       vswhereToolExe = path.join(VSWHERE_PATH, 'vswhere.exe')
       cachedToolDirectory = await toolCache.cacheDir(