From b72d1a3b6cc3ecf7212c3c0c77515c40f8b5e9c6 Mon Sep 17 00:00:00 2001
From: Phillip Johnsen <johphi@gmail.com>
Date: Mon, 21 Oct 2019 14:04:37 +0200
Subject: [PATCH] Add CI test verifying Mustache works with Deno

To ensure the ES module and source exposed by this package is compatible
with Deno going forward.

Added benefit is we get some sanity checks of the source code for free
due to Deno's built-in TypeScript compiler getting angry if it sees
things that does not make sense, in terms of missing function arguments
and so on.
---
 .github/workflows/verify.yml     | 13 ++++++++++++-
 test/module-systems/deno-test.ts | 17 +++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)
 create mode 100644 test/module-systems/deno-test.ts

diff --git a/.github/workflows/verify.yml b/.github/workflows/verify.yml
index f6d37898c..42e80d9d4 100644
--- a/.github/workflows/verify.yml
+++ b/.github/workflows/verify.yml
@@ -2,7 +2,7 @@ name: Verify changes
 
 on: [push, pull_request]
 
-jobs:       
+jobs:
   tests:
     runs-on: ubuntu-latest
 
@@ -71,3 +71,14 @@ jobs:
         run: |
           npm ci
           npx mocha test/module-systems/browser-test.js
+
+  deno-usage:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v1
+      - uses: denolib/setup-deno@v1
+        with:
+          deno-version: 'v0.23.0'
+      - run: deno --version
+      - run: deno test --allow-net=deno.land test/module-systems/deno-test.ts
diff --git a/test/module-systems/deno-test.ts b/test/module-systems/deno-test.ts
new file mode 100644
index 000000000..9325ae0b4
--- /dev/null
+++ b/test/module-systems/deno-test.ts
@@ -0,0 +1,17 @@
+import { test } from "https://deno.land/std@v0.21.0/testing/mod.ts";
+import { assertEquals } from "https://deno.land/std@v0.21.0/testing/asserts.ts";
+import mustache from "../../mustache.mjs";
+
+const view = {
+  title: "Joe",
+  calc: function() {
+    return 2 + 4;
+  }
+};
+
+test(function canUseMustache() {
+  assertEquals(
+    mustache.render("{{title}} spends {{calc}}", view),
+    "Joe spends 6"
+  );
+});