Normalize Unicode

lib/fuzzy-finder-view.js

@@ -23,8 +23,14 @@ class FuzzyFinderView {
         if (colon !== -1) {
           query = query.slice(0, colon)
         }
-        // Normalize to backslashes on Windows
-        if (process.platform === 'win32') {
+
+        // Compose Unicode by default
+        query = query.normalize('NFC')
+        if (process.platform === 'darwin') {
+          // But decompose on macOS
+          query = query.normalize('NFD')
+        } else if (process.platform === 'win32') {
+          // Normalize to backslashes on Windows
           query = query.replace(/\//g, '\\')
         }
 

spec/fuzzy-finder-spec.js

@@ -927,6 +927,42 @@ describe('FuzzyFinder', () => {
     })
   })
 
+  describe('unicode characters', () => {
+    const originalPlatform = process.platform
+
+    afterEach(() => {
+      Object.defineProperty(process, 'platform', {value: originalPlatform})
+    })
+
+    it('decomposes unicode characters on macOS', async () => {
+      Object.defineProperty(process, 'platform', {value: 'darwin'})
+
+      await bufferView.toggle()
+
+      bufferView.selectListView.refs.queryEditor.setText('erstiebegrüßung')
+
+      const query = bufferView.selectListView.getFilterQuery()
+      expect(query.length).toBe(16)
+      expect(query.includes('ü')).toBe(false)
+      expect(query.includes('u\u0308')).toBe(true)
+    })
+
+    it('composes unicode characters on Windows and Linux', async () => {
+      for (let platform of ['win32, linux']) {
+        Object.defineProperty(process, 'platform', {value: platform})
+
+        await bufferView.toggle()
+
+        bufferView.selectListView.refs.queryEditor.setText('erstiebegru\u0308ßung')
+
+        const query = bufferView.selectListView.getFilterQuery()
+        expect(query.length).toBe(15)
+        expect(query.includes('ü')).toBe(true)
+        expect(query.includes('u\u0308')).toBe(false)
+      }
+    })
+  })
+
   describe('match highlighting', () => {
     beforeEach(async () => {
       jasmine.attachToDOM(workspaceElement)