feat(services): add guilds endpoints

src/tools/utils/__test__/parseStringNullish.test.ts

@@ -3,15 +3,20 @@ import { parseStringNullish } from '../parseStringNullish.js'
 const defaultString = 'defaultString'
 
 describe('/tools/utils/parseStringNullish', () => {
+  it('returns `defaultString` if `string === undefined`', () => {
+    expect(parseStringNullish(defaultString, undefined)).toEqual(defaultString)
+  })
+
+  it('returns `null` if `string === null`', () => {
+    expect(parseStringNullish(defaultString, null)).toEqual(null)
+  })
+
   it('returns `null` if `string.length === 0`', () => {
     expect(parseStringNullish(defaultString, '')).toEqual(null)
   })
 
-  it('returns `defaultString` if `string == null`', () => {
-    expect(parseStringNullish(defaultString)).toEqual(defaultString)
-  })
-
   it('returns `string` if `string.length > 0`', () => {
-    expect(parseStringNullish(defaultString, 'string')).toEqual('string')
+    const string = 'myString'
+    expect(parseStringNullish(defaultString, string)).toEqual(string)
   })
 })