chore: better test coverage

src/types/errors/spec/SAS9AuthError.spec.ts

@@ -0,0 +1,30 @@
+import { SAS9AuthError } from '../SAS9AuthError'
+
+describe('SAS9AuthError', () => {
+  it('should have the correct error message', () => {
+    const error = new SAS9AuthError()
+    expect(error.message).toBe(
+      'The credentials you provided cannot be authenticated. Please provide a valid set of credentials.'
+    )
+  })
+
+  it('should have the correct error name', () => {
+    const error = new SAS9AuthError()
+    expect(error.name).toBe('AuthorizeError')
+  })
+
+  it('should be an instance of SAS9AuthError', () => {
+    const error = new SAS9AuthError()
+    expect(error).toBeInstanceOf(SAS9AuthError)
+  })
+
+  it('should be an instance of Error', () => {
+    const error = new SAS9AuthError()
+    expect(error).toBeInstanceOf(Error)
+  })
+
+  it('should set the prototype correctly', () => {
+    const error = new SAS9AuthError()
+    expect(Object.getPrototypeOf(error)).toBe(SAS9AuthError.prototype)
+  })
+})