Fix normalize Cb to B in Db (#1183)

Resolves #1171
Thanks to @beltonk for reporting

Author: martijnversluis

src/normalize_mappings/enharmonic-normalize.ts

@@ -19,7 +19,7 @@ const enharmonics: Record<string, Record<string, string>> = {
     'Bb': 'A#',
   },
   'Db': {
-    'B': 'Cb',
+    'Cb': 'B',
     'F#': 'Gb',
     'G#': 'Ab',
     'A#': 'Bb',

test/key/normalize.test.ts

@@ -1,8 +1,11 @@
 import { buildKey } from '../utilities';
+
 import {
-  ChordProParser, NUMERIC, SYMBOL, TextFormatter,
+  NUMERAL,
+  NUMERIC,
+  SOLFEGE,
+  SYMBOL,
 } from '../../src';
-import { NUMERAL, SOLFEGE } from '../../src/constants';
 
 describe('Key', () => {
   describe('normalize', () => {
@@ -69,15 +72,5 @@ describe('Key', () => {
     it('normalizes bIV', () => {
       expect(buildKey('IV', NUMERAL, 'b').normalize().toString()).toEqual('III');
     });
-
-    it('normalizes Db key', () => {
-      const song = new ChordProParser()
-        .parse('[E] [E/B] [E/C#] [E/A]')
-        .setKey('E')
-        .setCapo(3);
-
-      const rendered = new TextFormatter().format(song).trim();
-      expect(rendered).toEqual('Db Db/Ab Db/Bb Db/Gb');
-    });
   });
 });

test/numeral_chord/to_chord_symbol_string.test.ts

@@ -121,7 +121,7 @@ const majorExamples = {
     'V': 'Ab',
     'bVI': 'A',
     'VI': 'Bb',
-    'bVII': 'Cb',
+    'bVII': 'B',
     'VII': 'C',
   },
 

test/numeric_chord/to_chord_symbol_string.test.ts

@@ -121,7 +121,7 @@ const majorExamples = {
     '5': 'Ab',
     'b6': 'A',
     '6': 'Bb',
-    'b7': 'Cb',
+    'b7': 'B',
     '7': 'C',
   },