test: add them

Author: jake-bassett

projects/common/src/utilities/formatters/enum/display-string-enum.test.ts

@@ -0,0 +1,31 @@
+import { displayStringEnum } from './display-string-enum';
+
+describe('Display string enum', () => {
+  const enum TestEnum {
+    Flat = 'flatcase',
+    UpperFlat = 'UPPERFLATCASE',
+    Camel = 'camelCase',
+    Pascal = 'PascalCase',
+    Snake = 'snake_case',
+    PascalSnake = 'Pascal_Snake_Case',
+    Kabob = 'kabob-case',
+    Train = 'Train-Case',
+    Macro = 'MACRO_CASE',
+    MacroTrain = 'MACRO-TRAIN-CASE'
+  }
+
+  test('can convert to display string', () => {
+    expect(displayStringEnum(undefined)).toBe('-');
+    expect(displayStringEnum('a')).toBe('A');
+    expect(displayStringEnum(TestEnum.Flat)).toBe('Flatcase');
+    expect(displayStringEnum(TestEnum.UpperFlat)).toBe('Upperflatcase');
+    expect(displayStringEnum(TestEnum.Camel)).toBe('Camel case');
+    expect(displayStringEnum(TestEnum.Pascal)).toBe('Pascal case');
+    expect(displayStringEnum(TestEnum.Snake)).toBe('Snake case');
+    expect(displayStringEnum(TestEnum.PascalSnake)).toBe('Pascal snake case');
+    expect(displayStringEnum(TestEnum.Kabob)).toBe('Kabob case');
+    expect(displayStringEnum(TestEnum.Train)).toBe('Train case');
+    expect(displayStringEnum(TestEnum.Macro)).toBe('Macro case');
+    expect(displayStringEnum(TestEnum.MacroTrain)).toBe('Macro train case');
+  });
+});

projects/common/src/utilities/formatters/enum/display-string-enum.ts

@@ -5,5 +5,9 @@ export const displayStringEnum = (provided?: string): string => {
     return '-';
   }
 
-  return startCase(provided.toLowerCase());
+  // This removes dashes and underscores and gives all words initial caps
+  const startCased = startCase(provided);
+
+  // We only want the first word capitalized.
+  return `${startCased[0]}${startCased.substr(1).toLowerCase()}`;
 };