update unit test

test/configFactory.test.ts

@@ -0,0 +1,41 @@
+import { expect } from 'chai';
+import { configFactory, ConfigFunction } from '../src/configFactory';
+import { Config } from '../src/types';
+
+describe('configFactory', () => {
+  let config: ReturnType<typeof configFactory>;
+
+  beforeEach(() => {
+    config = configFactory();
+  });
+
+  it('should set and get configuration values', () => {
+    config.setValue('someKey' as keyof Config, 'someValue');
+    expect(config('someKey' as keyof Config)).to.equal('someValue');
+  });
+
+  it('should throw an error if no provider is set and key is not in settings', () => {
+    expect(() => config('someKey' as keyof Config)).to.throw(
+      'A configuration provider has not been set'
+    );
+  });
+
+  it('should use the provider function to get configuration values', () => {
+    const providerFunction: ConfigFunction = (key) => {
+      if ((key as string) === 'someKey') return 'providedValue';
+      return null;
+    };
+    config.setProvider(providerFunction);
+    expect(config('someKey' as keyof Config)).to.equal('providedValue');
+  });
+
+  it('should prioritize settings over provider function', () => {
+    config.setValue('someKey' as keyof Config, 'someValue');
+    const providerFunction: ConfigFunction = (key) => {
+      if ((key as string) === 'someKey') return 'providedValue';
+      return null;
+    };
+    config.setProvider(providerFunction);
+    expect(config('someKey' as keyof Config)).to.equal('someValue');
+  });
+});