make windows paths case-insensitive

sindresorhus · Jul 3, 2019 · 40b4d6d · 40b4d6d
1 parent 69364ed
commit 40b4d6d
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diff --git a/index.js b/index.js
@@ -1,11 +1,17 @@
 'use strict';
 const path = require('path');
+const os = require('os');
 const pathIsInside = require('path-is-inside');
 
 module.exports = (childPath, parentPath) => {
 	childPath = path.resolve(childPath);
 	parentPath = path.resolve(parentPath);
 
+	if (os.platform() === 'win32') {
+		childPath = childPath.toLowerCase();
+		parentPath = parentPath.toLowerCase();
+	}
+
 	if (childPath === parentPath) {
 		return false;
 	}

diff --git a/test.js b/test.js
@@ -1,3 +1,5 @@
+import os from 'os';
+import path from 'path';
 import test from 'ava';
 import isPathInside from '.';
 
@@ -7,3 +9,22 @@ test('main', t => {
 	t.false(isPathInside('a/b', 'a/b'));
 	t.false(isPathInside('/a/b', '/a/b'));
 });
+
+test('win32', t => {
+	const osPlatform = os.platform;
+	const processPlatform = process.platform;
+	const pathSep = path.sep;
+
+	os.platform = () => 'win32';
+	Object.defineProperty(process, 'platform', {value: 'win32'});
+	Object.defineProperty(path, 'sep', {value: '\\'});
+
+	t.true(isPathInside('A\\b\\c', 'a\\b'));
+	t.false(isPathInside('A\\b', 'a\\b'));
+	t.true(isPathInside('c:\\a\\b\\c\\d', 'C:\\a\\b\\c'));
+	t.false(isPathInside('C:\\a\\b\\c', 'c:\\a\\b\\c'));
+
+	os.platform = osPlatform;
+	Object.defineProperty(process, 'platform', {value: processPlatform});
+	Object.defineProperty(path, 'sep', {value: pathSep});
+});