Fix removeSingleSlash option adding slashes (#122)

Author: silverwind

index.js

@@ -175,9 +175,15 @@ const normalizeUrl = (urlString, options) => {
 		urlObj.pathname = urlObj.pathname.replace(/\/$/, '');
 	}
 
+	const oldUrlString = urlString;
+
 	// Take advantage of many of the Node `url` normalizations
 	urlString = urlObj.toString();
 
+	if (!options.removeSingleSlash && urlObj.pathname === '/' && !oldUrlString.endsWith('/') && urlObj.hash === '') {
+		urlString = urlString.replace(/\/$/, '');
+	}
+
 	// Remove ending `/` unless removeSingleSlash is false
 	if ((options.removeTrailingSlash || urlObj.pathname === '/') && urlObj.hash === '' && options.removeSingleSlash) {
 		urlString = urlString.replace(/\/$/, '');

index.test-d.ts

@@ -16,6 +16,7 @@ normalizeUrl('www.sindresorhus.com?foo=bar&ref=test_ref', {
 	removeQueryParameters: ['ref', /test/]
 });
 normalizeUrl('http://sindresorhus.com/', {removeTrailingSlash: false});
+normalizeUrl('http://sindresorhus.com/', {removeSingleSlash: false});
 normalizeUrl('www.sindresorhus.com/foo/default.php', {
 	removeDirectoryIndex: [/^default\.[a-z]+$/, 'foo']
 });

test.js

@@ -119,26 +119,35 @@ test('forceHttps option', t => {
 
 test('removeTrailingSlash option', t => {
 	const options = {removeTrailingSlash: false};
+	t.is(normalizeUrl('http://sindresorhus.com'), 'http://sindresorhus.com');
 	t.is(normalizeUrl('http://sindresorhus.com/'), 'http://sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com', options), 'http://sindresorhus.com');
 	t.is(normalizeUrl('http://sindresorhus.com/', options), 'http://sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com/redirect'), 'http://sindresorhus.com/redirect');
 	t.is(normalizeUrl('http://sindresorhus.com/redirect/'), 'http://sindresorhus.com/redirect');
 	t.is(normalizeUrl('http://sindresorhus.com/redirect/', options), 'http://sindresorhus.com/redirect/');
+	t.is(normalizeUrl('http://sindresorhus.com/redirect/', options), 'http://sindresorhus.com/redirect/');
+	t.is(normalizeUrl('http://sindresorhus.com/#/'), 'http://sindresorhus.com/#/');
 	t.is(normalizeUrl('http://sindresorhus.com/#/', options), 'http://sindresorhus.com/#/');
 	t.is(normalizeUrl('http://sindresorhus.com/?unicorns=true'), 'http://sindresorhus.com/?unicorns=true');
 	t.is(normalizeUrl('http://sindresorhus.com/?unicorns=true', options), 'http://sindresorhus.com/?unicorns=true');
 });
 
 test('removeSingleSlash option', t => {
 	const options = {removeSingleSlash: false};
+	t.is(normalizeUrl('https://sindresorhus.com', options), 'https://sindresorhus.com');
 	t.is(normalizeUrl('https://sindresorhus.com/', options), 'https://sindresorhus.com/');
+	t.is(normalizeUrl('https://sindresorhus.com/redirect', options), 'https://sindresorhus.com/redirect');
 	t.is(normalizeUrl('https://sindresorhus.com/redirect/', options), 'https://sindresorhus.com/redirect');
 	t.is(normalizeUrl('https://sindresorhus.com/#/', options), 'https://sindresorhus.com/#/');
 	t.is(normalizeUrl('https://sindresorhus.com/?unicorns=true', options), 'https://sindresorhus.com/?unicorns=true');
 });
 
 test('removeSingleSlash option combined with removeTrailingSlash option', t => {
 	const options = {removeTrailingSlash: false, removeSingleSlash: false};
+	t.is(normalizeUrl('https://sindresorhus.com', options), 'https://sindresorhus.com');
 	t.is(normalizeUrl('https://sindresorhus.com/', options), 'https://sindresorhus.com/');
+	t.is(normalizeUrl('https://sindresorhus.com/redirect', options), 'https://sindresorhus.com/redirect');
 	t.is(normalizeUrl('https://sindresorhus.com/redirect/', options), 'https://sindresorhus.com/redirect/');
 	t.is(normalizeUrl('https://sindresorhus.com/#/', options), 'https://sindresorhus.com/#/');
 	t.is(normalizeUrl('https://sindresorhus.com/?unicorns=true', options), 'https://sindresorhus.com/?unicorns=true');