From 7bb988aa541b8841f8be8ee6aab7da9873e91c86 Mon Sep 17 00:00:00 2001
From: Yanick Champoux <yanick@babyl.ca>
Date: Thu, 2 Mar 2023 11:42:33 -0500
Subject: [PATCH] initialState

---
 src/Updux.ts        | 18 +++++++++++++++++-
 src/initial.test.ts | 15 +++++++++++++++
 2 files changed, 32 insertions(+), 1 deletion(-)
 create mode 100644 src/initial.test.ts

diff --git a/src/Updux.ts b/src/Updux.ts
index eeb5984..e77f598 100644
--- a/src/Updux.ts
+++ b/src/Updux.ts
@@ -1 +1,17 @@
-export default class Updux { }
+export default class Updux<T_Local_State = Record<any, any>> {
+    #local_initial: T_Local_State;
+
+    constructor(
+        config: Partial<{
+            initial: T_Local_State;
+        }>,
+    ) {
+        // TODO test that we default to {}
+        this.#local_initial = config.initial ?? ({} as T_Local_State);
+    }
+
+    // TODO memoize?
+    get initial() {
+        return this.#local_initial;
+    }
+}
diff --git a/src/initial.test.ts b/src/initial.test.ts
new file mode 100644
index 0000000..082a40e
--- /dev/null
+++ b/src/initial.test.ts
@@ -0,0 +1,15 @@
+import Updux from './Updux.js';
+
+test('default', () => {
+    const { initial } = new Updux({});
+
+    expect(initial).toBeTypeOf('object');
+    expect(initial).toEqual({});
+});
+
+test('number', () => {
+    const { initial } = new Updux({ initial: 3 });
+
+    expect(initial).toBeTypeOf('number');
+    expect(initial).toEqual(3);
+});