From c233061f7dd402bbf116a539b37498ecffef1064 Mon Sep 17 00:00:00 2001
From: Maximilian Stoiber <contact@mxstbr.com>
Date: Sun, 24 Sep 2017 17:36:42 +0200
Subject: [PATCH] Add failing test for tab indentation completion

---
 lib/__tests__/handle-tab.test.js | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/lib/__tests__/handle-tab.test.js b/lib/__tests__/handle-tab.test.js
index 38bb7c7..b15b8c9 100644
--- a/lib/__tests__/handle-tab.test.js
+++ b/lib/__tests__/handle-tab.test.js
@@ -61,3 +61,29 @@ it('should replace selected content with the tab', () => {
   expect(toPlainText(before)).toEqual(initialText);
   expect(toPlainText(after)).toEqual(tabs(1));
 });
+
+it('should match the indentation of the previous line', () => {
+  const evt = { preventDefault: jest.fn() };
+  const initialText = `${tabs(2)}const a = 'b';\n`;
+
+  const currentContent = ContentState.createFromText(initialText);
+  // "        const a = 'b'
+  //  "
+  // ^ cursor here (on second line/in second block)
+  const cursorOnSecondLine = SelectionState.createEmpty(
+    currentContent
+      .getBlockMap()
+      .last()
+      .getKey()
+  );
+  const before = EditorState.create({
+    allowUndo: true,
+    currentContent,
+    // Focus the entire initial word
+    selection: cursorOnSecondLine
+  });
+
+  const after = handleTab(evt, before);
+  expect(toPlainText(before)).toEqual(initialText);
+  expect(toPlainText(after)).toEqual(initialText + tabs(2));
+});