From 6c84fd47744cc818976c917cc269b5cd3910d93d Mon Sep 17 00:00:00 2001
From: Kurt Tomlinson <ktomlinson@taskrabbit.com>
Date: Fri, 9 Oct 2020 10:02:43 -0400
Subject: [PATCH 1/3] create diff output folder before trying to create diff
 output file

---
 packages/diff-looks-same/src/create-looks-same-differ.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/diff-looks-same/src/create-looks-same-differ.js b/packages/diff-looks-same/src/create-looks-same-differ.js
index 033a2e6e..1aa501ba 100644
--- a/packages/diff-looks-same/src/create-looks-same-differ.js
+++ b/packages/diff-looks-same/src/create-looks-same-differ.js
@@ -20,12 +20,13 @@ function createLooksSameDiffer(config) {
         return reject(new Error('Current image is empty'));
       }
 
-      return looksSame(reference, current, instanceConfig, (err, isSame) => {
+      return looksSame(reference, current, instanceConfig, async (err, isSame) => {
         if (err) {
           reject(err);
         } else if (isSame) {
           resolve(isSame);
         } else {
+          await fs.ensureFile(diffPath);
           looksSame.createDiff(
             {
               ...instanceConfig,

From 8b9661466318643350558b5b961b69e1fc87bf31 Mon Sep 17 00:00:00 2001
From: Kurt Tomlinson <ktomlinson@taskrabbit.com>
Date: Fri, 9 Oct 2020 10:08:16 -0400
Subject: [PATCH 2/3] use sync fs function instead

---
 packages/diff-looks-same/src/create-looks-same-differ.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/diff-looks-same/src/create-looks-same-differ.js b/packages/diff-looks-same/src/create-looks-same-differ.js
index 1aa501ba..7ba7f5e7 100644
--- a/packages/diff-looks-same/src/create-looks-same-differ.js
+++ b/packages/diff-looks-same/src/create-looks-same-differ.js
@@ -20,13 +20,13 @@ function createLooksSameDiffer(config) {
         return reject(new Error('Current image is empty'));
       }
 
-      return looksSame(reference, current, instanceConfig, async (err, isSame) => {
+      return looksSame(reference, current, instanceConfig, (err, isSame) => {
         if (err) {
           reject(err);
         } else if (isSame) {
           resolve(isSame);
         } else {
-          await fs.ensureFile(diffPath);
+          fs.ensureFileSync(diffPath);
           looksSame.createDiff(
             {
               ...instanceConfig,

From f72172ea3242221ce94839cf06b4ace1e153fd27 Mon Sep 17 00:00:00 2001
From: Kurt Tomlinson <kurttomlinson@gmail.com>
Date: Sat, 14 Nov 2020 12:58:22 -0500
Subject: [PATCH 3/3] add a spec to verify that deeply nested diff files can be
 created

---
 .../src/create-looks-same-differ.spec.js      | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 packages/diff-looks-same/src/create-looks-same-differ.spec.js

diff --git a/packages/diff-looks-same/src/create-looks-same-differ.spec.js b/packages/diff-looks-same/src/create-looks-same-differ.spec.js
new file mode 100644
index 00000000..7083a0a4
--- /dev/null
+++ b/packages/diff-looks-same/src/create-looks-same-differ.spec.js
@@ -0,0 +1,51 @@
+const fs = require('fs-extra');
+const path = require('path');
+const createLooksSameDiffer = require('./create-looks-same-differ');
+
+const workingDirectory = './fwtaajxnfeuzedzu';
+const darkGrayPath = path.join(workingDirectory, 'dark-dray.png');
+const lightGrayPath = path.join(workingDirectory, 'light-dray.png');
+
+function writeBase64Image({ outputPath, base64String }) {
+  const imageData = base64String.split(';base64,').pop();
+
+  fs.ensureFileSync(outputPath);
+  fs.writeFileSync(outputPath, imageData, { encoding: 'base64' });
+}
+
+describe('createLooksSameDiffer', () => {
+  beforeEach(() => {
+    const darkGrayBase64String =
+      'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQYV2NISUn5DwAEiAIshLJN6AAAAABJRU5ErkJggg==';
+    writeBase64Image({
+      outputPath: darkGrayPath,
+      base64String: darkGrayBase64String,
+    });
+    const lightGrayBase64String =
+      'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQYV2M4ceLEfwAIDANYMDoQswAAAABJRU5ErkJggg==';
+    writeBase64Image({
+      outputPath: lightGrayPath,
+      base64String: lightGrayBase64String,
+    });
+  });
+
+  afterEach(() => {
+    fs.rmdirSync(workingDirectory, { recursive: true });
+  });
+
+  it('creates diff files in deeply nested directories', async () => {
+    const config = {};
+    const looksSameDiffer = createLooksSameDiffer(config);
+
+    const diffPath = path.join(
+      workingDirectory,
+      'deeply',
+      'nested',
+      'diff.png'
+    );
+    const tolerance = 0;
+    await looksSameDiffer(darkGrayPath, lightGrayPath, diffPath, tolerance);
+
+    expect(fs.existsSync(diffPath)).toEqual(true);
+  });
+});