From 62ea2c691e9a0e288bd3733f9e3c7f2b97dbf48a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Breitbart?= <jerch@rockborn.de>
Date: Mon, 17 Feb 2020 12:39:36 +0100
Subject: [PATCH] wide char tests

---
 src/InputHandler.test.ts | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/src/InputHandler.test.ts b/src/InputHandler.test.ts
index 645a905db..6b98d61e8 100644
--- a/src/InputHandler.test.ts
+++ b/src/InputHandler.test.ts
@@ -1507,6 +1507,29 @@ describe('InputHandler', () => {
         assert.equal(term.buffer.x, 0);
         assert.equal(term.buffer.y, 1);
       });
+      it('handles wide chars correctly', () => {
+        term.writeSync('\x1b[?45h');
+        term.writeSync('￥￥￥');
+        assert.deepEqual(getLines(term, 2), ['￥￥', '￥']);
+        term.writeSync(ttyBS);
+        assert.deepEqual(getLines(term, 2), ['￥￥', '  ']);
+        assert.equal(term.buffer.x, 1);
+        term.writeSync(ttyBS);
+        assert.deepEqual(getLines(term, 2), ['￥￥', '  ']);
+        assert.equal(term.buffer.x, 0);
+        term.writeSync(ttyBS);
+        assert.deepEqual(getLines(term, 2), ['￥  ', '  ']);
+        assert.equal(term.buffer.x, 3);  // x=4 skipped due to early wrap-around
+        term.writeSync(ttyBS);
+        assert.deepEqual(getLines(term, 2), ['￥  ', '  ']);
+        assert.equal(term.buffer.x, 2);
+        term.writeSync(ttyBS);
+        assert.deepEqual(getLines(term, 2), ['    ', '  ']);
+        assert.equal(term.buffer.x, 1);
+        term.writeSync(ttyBS);
+        assert.deepEqual(getLines(term, 2), ['    ', '  ']);
+        assert.equal(term.buffer.x, 0);
+      });
     });
   });
 });