Filter file scheme; disable http, https and ftp entirely

test/app/protocol_filter_test.js

@@ -0,0 +1,83 @@
+const { expect } = require('chai');
+
+const { _urlToPath } = require('../../app/protocol_filter');
+
+describe('Protocol Filter', () => {
+  describe('_urlToPath', () => {
+    it('returns proper file path for unix style file URI with hash', () => {
+      const path =
+        'file:///Users/someone/Development/signal/electron/background.html#first-page';
+      const expected =
+        '/Users/someone/Development/signal/electron/background.html';
+
+      const actual = _urlToPath(path);
+      expect(actual).to.equal(expected);
+    });
+
+    it('returns proper file path for unix style file URI with querystring', () => {
+      const path =
+        'file:///Users/someone/Development/signal/electron/background.html?name=Signal&locale=en&version=2.4.0';
+      const expected =
+        '/Users/someone/Development/signal/electron/background.html';
+
+      const actual = _urlToPath(path);
+      expect(actual).to.equal(expected);
+    });
+
+    it('returns proper file path for unix style file URI with hash and querystring', () => {
+      const path =
+        'file:///Users/someone/Development/signal/electron/background.html#somewhere?name=Signal';
+      const expected =
+        '/Users/someone/Development/signal/electron/background.html';
+
+      const actual = _urlToPath(path);
+      expect(actual).to.equal(expected);
+    });
+
+    it('returns proper file path for windows style file URI', () => {
+      const path =
+        'file:///C:/Users/Someone/dev/desktop/background.html?name=Signal&locale=en&version=2.4.0';
+      const expected = 'C:/Users/Someone/dev/desktop/background.html';
+
+      const actual = _urlToPath(path, { isWindows: true });
+      expect(actual).to.equal(expected);
+    });
+
+    it('translates from URL format to filesystem format', () => {
+      const path =
+        'file:///Users/someone/Development%20Files/signal/electron/background.html';
+      const expected =
+        '/Users/someone/Development Files/signal/electron/background.html';
+
+      const actual = _urlToPath(path);
+      expect(actual).to.equal(expected);
+    });
+
+    it('translates from URL format to filesystem format', () => {
+      const path =
+        'file:///Users/someone/Development%20Files/signal/electron/background.html';
+      const expected =
+        '/Users/someone/Development Files/signal/electron/background.html';
+
+      const actual = _urlToPath(path);
+      expect(actual).to.equal(expected);
+    });
+
+    // this seems to be the only way to get a relative path through Electron
+    it('handles SMB share path', () => {
+      const path = 'file://relative/path';
+      const expected = 'relative/path';
+
+      const actual = _urlToPath(path);
+      expect(actual).to.equal(expected);
+    });
+
+    it('hands back a path with .. in it', () => {
+      const path = 'file://../../..';
+      const expected = '../../..';
+
+      const actual = _urlToPath(path);
+      expect(actual).to.equal(expected);
+    });
+  });
+});