diff --git a/src/InputHandler.test.ts b/src/InputHandler.test.ts
index a8b2ff12..caf74624 100644
--- a/src/InputHandler.test.ts
+++ b/src/InputHandler.test.ts
@@ -67,142 +67,3 @@ describe('InputHandler', () => {
     });
   });
 });
-
-const old_wcwidth = (function(opts: {nul: number, control: number}): (ucs: number) => number {
-    // extracted from https://www.cl.cam.ac.uk/%7Emgk25/ucs/wcwidth.c
-    // combining characters
-    const COMBINING = [
-        [0x0300, 0x036F], [0x0483, 0x0486], [0x0488, 0x0489],
-        [0x0591, 0x05BD], [0x05BF, 0x05BF], [0x05C1, 0x05C2],
-        [0x05C4, 0x05C5], [0x05C7, 0x05C7], [0x0600, 0x0603],
-        [0x0610, 0x0615], [0x064B, 0x065E], [0x0670, 0x0670],
-        [0x06D6, 0x06E4], [0x06E7, 0x06E8], [0x06EA, 0x06ED],
-        [0x070F, 0x070F], [0x0711, 0x0711], [0x0730, 0x074A],
-        [0x07A6, 0x07B0], [0x07EB, 0x07F3], [0x0901, 0x0902],
-        [0x093C, 0x093C], [0x0941, 0x0948], [0x094D, 0x094D],
-        [0x0951, 0x0954], [0x0962, 0x0963], [0x0981, 0x0981],
-        [0x09BC, 0x09BC], [0x09C1, 0x09C4], [0x09CD, 0x09CD],
-        [0x09E2, 0x09E3], [0x0A01, 0x0A02], [0x0A3C, 0x0A3C],
-        [0x0A41, 0x0A42], [0x0A47, 0x0A48], [0x0A4B, 0x0A4D],
-        [0x0A70, 0x0A71], [0x0A81, 0x0A82], [0x0ABC, 0x0ABC],
-        [0x0AC1, 0x0AC5], [0x0AC7, 0x0AC8], [0x0ACD, 0x0ACD],
-        [0x0AE2, 0x0AE3], [0x0B01, 0x0B01], [0x0B3C, 0x0B3C],
-        [0x0B3F, 0x0B3F], [0x0B41, 0x0B43], [0x0B4D, 0x0B4D],
-        [0x0B56, 0x0B56], [0x0B82, 0x0B82], [0x0BC0, 0x0BC0],
-        [0x0BCD, 0x0BCD], [0x0C3E, 0x0C40], [0x0C46, 0x0C48],
-        [0x0C4A, 0x0C4D], [0x0C55, 0x0C56], [0x0CBC, 0x0CBC],
-        [0x0CBF, 0x0CBF], [0x0CC6, 0x0CC6], [0x0CCC, 0x0CCD],
-        [0x0CE2, 0x0CE3], [0x0D41, 0x0D43], [0x0D4D, 0x0D4D],
-        [0x0DCA, 0x0DCA], [0x0DD2, 0x0DD4], [0x0DD6, 0x0DD6],
-        [0x0E31, 0x0E31], [0x0E34, 0x0E3A], [0x0E47, 0x0E4E],
-        [0x0EB1, 0x0EB1], [0x0EB4, 0x0EB9], [0x0EBB, 0x0EBC],
-        [0x0EC8, 0x0ECD], [0x0F18, 0x0F19], [0x0F35, 0x0F35],
-        [0x0F37, 0x0F37], [0x0F39, 0x0F39], [0x0F71, 0x0F7E],
-        [0x0F80, 0x0F84], [0x0F86, 0x0F87], [0x0F90, 0x0F97],
-        [0x0F99, 0x0FBC], [0x0FC6, 0x0FC6], [0x102D, 0x1030],
-        [0x1032, 0x1032], [0x1036, 0x1037], [0x1039, 0x1039],
-        [0x1058, 0x1059], [0x1160, 0x11FF], [0x135F, 0x135F],
-        [0x1712, 0x1714], [0x1732, 0x1734], [0x1752, 0x1753],
-        [0x1772, 0x1773], [0x17B4, 0x17B5], [0x17B7, 0x17BD],
-        [0x17C6, 0x17C6], [0x17C9, 0x17D3], [0x17DD, 0x17DD],
-        [0x180B, 0x180D], [0x18A9, 0x18A9], [0x1920, 0x1922],
-        [0x1927, 0x1928], [0x1932, 0x1932], [0x1939, 0x193B],
-        [0x1A17, 0x1A18], [0x1B00, 0x1B03], [0x1B34, 0x1B34],
-        [0x1B36, 0x1B3A], [0x1B3C, 0x1B3C], [0x1B42, 0x1B42],
-        [0x1B6B, 0x1B73], [0x1DC0, 0x1DCA], [0x1DFE, 0x1DFF],
-        [0x200B, 0x200F], [0x202A, 0x202E], [0x2060, 0x2063],
-        [0x206A, 0x206F], [0x20D0, 0x20EF], [0x302A, 0x302F],
-        [0x3099, 0x309A], [0xA806, 0xA806], [0xA80B, 0xA80B],
-        [0xA825, 0xA826], [0xFB1E, 0xFB1E], [0xFE00, 0xFE0F],
-        [0xFE20, 0xFE23], [0xFEFF, 0xFEFF], [0xFFF9, 0xFFFB],
-        [0x10A01, 0x10A03], [0x10A05, 0x10A06], [0x10A0C, 0x10A0F],
-        [0x10A38, 0x10A3A], [0x10A3F, 0x10A3F], [0x1D167, 0x1D169],
-        [0x1D173, 0x1D182], [0x1D185, 0x1D18B], [0x1D1AA, 0x1D1AD],
-        [0x1D242, 0x1D244], [0xE0001, 0xE0001], [0xE0020, 0xE007F],
-        [0xE0100, 0xE01EF]
-    ];
-    // binary search
-    function bisearch(ucs: number): boolean {
-        let min = 0;
-        let max = COMBINING.length - 1;
-        let mid;
-        if (ucs < COMBINING[0][0] || ucs > COMBINING[max][1])
-            return false;
-        while (max >= min) {
-            mid = Math.floor((min + max) / 2);
-            if (ucs > COMBINING[mid][1])
-                min = mid + 1;
-            else if (ucs < COMBINING[mid][0])
-                max = mid - 1;
-            else
-                return true;
-        }
-        return false;
-    }
-    function wcwidth(ucs: number): number {
-      // test for 8-bit control characters
-      if (ucs === 0) {
-        return opts.nul;
-      }
-      if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0)) {
-        return opts.control;
-      }
-      // binary search in table of non-spacing characters
-      if (bisearch(ucs)) {
-        return 0;
-      }
-      // if we arrive here, ucs is not a combining or C0/C1 control character
-      if (isWide(ucs)) {
-        return 2;
-      }
-      return 1;
-    }
-    function isWide(ucs: number): boolean {
-      return (
-        ucs >= 0x1100 && (
-        ucs <= 0x115f ||                // Hangul Jamo init. consonants
-        ucs === 0x2329 ||
-        ucs === 0x232a ||
-        (ucs >= 0x2e80 && ucs <= 0xa4cf && ucs !== 0x303f) ||  // CJK..Yi
-        (ucs >= 0xac00 && ucs <= 0xd7a3) ||    // Hangul Syllables
-        (ucs >= 0xf900 && ucs <= 0xfaff) ||    // CJK Compat Ideographs
-        (ucs >= 0xfe10 && ucs <= 0xfe19) ||    // Vertical forms
-        (ucs >= 0xfe30 && ucs <= 0xfe6f) ||    // CJK Compat Forms
-        (ucs >= 0xff00 && ucs <= 0xff60) ||    // Fullwidth Forms
-        (ucs >= 0xffe0 && ucs <= 0xffe6) ||
-        (ucs >= 0x20000 && ucs <= 0x2fffd) ||
-        (ucs >= 0x30000 && ucs <= 0x3fffd)));
-    }
-    return wcwidth;
-})({nul: 0, control: 0});  // configurable options
-
-describe('wcwidth', () => {
-  it('same as old implementation for BMP and individual higher', (done) => {
-    for (let i = 0; i < 65536; ++i)
-      assert.equal(wcwidth(i), old_wcwidth(i));
-    // test some individual higher to fullfill branching
-    assert.equal(wcwidth(0x10A01), old_wcwidth(0x10A01));
-    assert.equal(wcwidth(0x30000), old_wcwidth(0x30000));
-    assert.equal(wcwidth(0x3fffe), old_wcwidth(0x3fffe));
-    done();
-  }).timeout(3000);
-  /*
-  it('new is at least 5 times faster', () => {
-    let start_new = new Date().getTime();
-    let x = 0;
-    for (let runs = 0; runs < 1; ++runs)
-      for (let i = 0; i < 65536; ++i)
-        x = wcwidth(i);
-    let end_new = new Date().getTime();
-    let start_old = new Date().getTime();
-    let y = 0;
-    for (let runs = 0; runs < 1; ++runs)
-      for (let i = 0; i < 65536; ++i)
-        y = old_wcwidth(i);
-    let end_old = new Date().getTime();
-    // console.log((end_new - start_new));
-    // console.log((end_old - start_old));
-    assert.equal(((end_new - start_new) * 5 < (end_old - start_old)), true);
-  });
-  */
-});