Add windows test in CircleCI (facebook#1114)

Summary: Pull Request resolved: facebook#1114

Reviewed By: avp

Differential Revision: D49014182

Pulled By: neildhar

fbshipit-source-id: 615394848483cb3898980fb65127090462dbba5c

.circleci/config.yml

@@ -31,6 +31,7 @@ workflows:
             - macos
       - emscripten
       - test-linux
+      - test-windows
       - test-e2e
       - test-e2e-intl
       - test-macos-test262
@@ -314,6 +315,23 @@ jobs:
             cmake --build ./build
             cmake --build ./build --target check-hermes
 
+  test-windows:
+    executor:
+      name: win/default
+    steps:
+      - checkout:
+          path: hermes
+      - run:
+          name: Set up dependencies
+          command: |
+            choco install cmake --installargs 'ADD_CMAKE_TO_PATH=System'
+            ln -s C:\tools\miniconda3\python C:\tools\miniconda3\python3
+      - run:
+          name: Run Hermes regression tests
+          command: |
+            cmake -S hermes -B build -G 'Visual Studio 16 2019'
+            cmake --build build --target check-hermes
+
   windows:
     executor:
       name: win/default

.gitattributes

@@ -0,0 +1,2 @@
+# Avoid modifying the line endings for lit tests since they change the output.
+test/** text eol=lf

test/hermes/date-default-timezone.js

@@ -5,7 +5,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-// RUN: TZ="MST+7MDT,M3.2.0/2,M11.1.0/2" %hermes -O %s | %FileCheck --match-full-lines %s
+// RUN: TZ="MST7MDT" %hermes -O %s | %FileCheck --match-full-lines %s
 "use strict";
 
 // Tests are being run under Mountain Time, with DST changes enabled (TZ var).