From 26a752baeaeac57c387f942c30e7415c4c8cdfd0 Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Sat, 4 Apr 2020 18:49:17 -0400
Subject: [PATCH] Added a simple javascript "shim" to invoke dustjs for later
 use with testing

---
 src/js/README.md                            |  9 +++++++
 src/js/dustjs_shim.js                       | 29 +++++++++++++++++++++
 src/js/test_cases/hello_world/input1.json   |  1 +
 src/js/test_cases/hello_world/input2.json   |  1 +
 src/js/test_cases/hello_world/template.dust |  1 +
 5 files changed, 41 insertions(+)
 create mode 100644 src/js/README.md
 create mode 100644 src/js/dustjs_shim.js
 create mode 100644 src/js/test_cases/hello_world/input1.json
 create mode 100644 src/js/test_cases/hello_world/input2.json
 create mode 100644 src/js/test_cases/hello_world/template.dust

diff --git a/src/js/README.md b/src/js/README.md
new file mode 100644
index 0000000..70a0fdd
--- /dev/null
+++ b/src/js/README.md
@@ -0,0 +1,9 @@
+* Compliance Tests
+These tests run my implementation of LinkedIn's Dust and the official implementation of [LinkedIn's DustJS](https://www.dustjs.com) as compares the output to ensure they match.
+** Setup
+Install LinkedIn's DustJS in order to rust the compliance tests
+** Running
+The dustjs_shim expects a path to a template file as the first parameter, and it expects a json context over stdin. For example, to invoke it on the command line you could run:
+```sh
+cat test_cases/hello_world/input1.json | node dustjs_shim.js test_cases/hello_world/template.dust
+```
diff --git a/src/js/dustjs_shim.js b/src/js/dustjs_shim.js
new file mode 100644
index 0000000..83b1ba8
--- /dev/null
+++ b/src/js/dustjs_shim.js
@@ -0,0 +1,29 @@
+var dust = require('dustjs-linkedin');
+var fs = require('fs');
+
+var argv = process.argv.slice(2);
+if (argv.length != 1) {
+  console.error("Expecting only 1 argument (a path to a template)");
+  process.exit(1);
+}
+var context = JSON.parse(fs.readFileSync(0, 'utf-8'));
+
+try {
+  var template_source = fs.readFileSync(argv[0], 'utf-8');
+} catch (err) {
+  console.error(err);
+  process.exit(1);
+}
+
+var compiled_template = dust.compile(template_source, "tmpl");
+dust.loadSource(compiled_template);
+
+dust.render("tmpl", context, function(err, out) {
+  if(err) {
+    console.error(err);
+    process.exit(1);
+  } else {
+    console.log(out);
+    process.exit(0);
+  }
+});
diff --git a/src/js/test_cases/hello_world/input1.json b/src/js/test_cases/hello_world/input1.json
new file mode 100644
index 0000000..ad7288d
--- /dev/null
+++ b/src/js/test_cases/hello_world/input1.json
@@ -0,0 +1 @@
+{"name": "Bob"}
diff --git a/src/js/test_cases/hello_world/input2.json b/src/js/test_cases/hello_world/input2.json
new file mode 100644
index 0000000..54011f2
--- /dev/null
+++ b/src/js/test_cases/hello_world/input2.json
@@ -0,0 +1 @@
+{"name": "Alice"}
diff --git a/src/js/test_cases/hello_world/template.dust b/src/js/test_cases/hello_world/template.dust
new file mode 100644
index 0000000..09f2e19
--- /dev/null
+++ b/src/js/test_cases/hello_world/template.dust
@@ -0,0 +1 @@
+Hello {name}!