From 63b9777a5b512f3f8300a4ebb4b8716c3e0a43ab Mon Sep 17 00:00:00 2001
From: jongleberry <jonathanrichardong@gmail.com>
Date: Fri, 22 Sep 2023 21:49:35 -0700
Subject: [PATCH] support null values

---
 __tests__/__snapshots__/types.js.snap | 2 ++
 __tests__/types.js                    | 9 +++++++++
 lib/index.js                          | 1 +
 3 files changed, 12 insertions(+)

diff --git a/__tests__/__snapshots__/types.js.snap b/__tests__/__snapshots__/types.js.snap
index 7fec84a..dbdce88 100644
--- a/__tests__/__snapshots__/types.js.snap
+++ b/__tests__/__snapshots__/types.js.snap
@@ -1,5 +1,7 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`a null value 1`] = `"__1____2____3__"`;
+
 exports[`a promise-returning function 1`] = `"__1__asdf__2__"`;
 
 exports[`a stream 1`] = `"__1__asdf__2__"`;
diff --git a/__tests__/types.js b/__tests__/types.js
index 6061cb8..3a50a20 100644
--- a/__tests__/types.js
+++ b/__tests__/types.js
@@ -54,3 +54,12 @@ test('a stream', async () => {
   assert.strictEqual(result, '__1__asdf__2__')
   expect(result).toMatchSnapshot()
 })
+
+test('a null value', async () => {
+  const promise1 = new Promise(resolve => setImmediate(() => resolve('')))
+  const promise2 = new Promise(resolve => setImmediate(() => resolve(null)))
+
+  const result = await streamToString(render`__1__${promise1}__2__${promise2}__3__`)
+  assert.strictEqual(result, '__1____2____3__')
+  expect(result).toMatchSnapshot()
+})
\ No newline at end of file
diff --git a/lib/index.js b/lib/index.js
index 68643c0..d50a840 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -30,6 +30,7 @@ function render (template, ...values) {
     }
 
     Promise.resolve(value).then((result) => {
+      if (!result) return
       if (typeof result === 'string') return stream.write(result)
       if (result.readableObjectMode) throw new Error('Readable object streams are not supported.')
       if (result.readable) return pipe(result)