reducer

src/reducer.test.js

@@ -0,0 +1,33 @@
+import { test } from 'tap';
+import u from '@yanick/updeep';
+
+import { Updux } from './Updux.js';
+
+test('basic reducer', async (t) => {
+    const dux = new Updux({});
+
+    t.type(dux.reducer, 'function');
+
+    t.same(dux.reducer({ a: 1 }, { type: 'foo' }), { a: 1 }, 'noop');
+});
+
+test('basic upreducer', async (t) => {
+    const dux = new Updux({});
+
+    t.type(dux.upreducer, 'function');
+
+    t.same(dux.upreducer({ type: 'foo' })({ a: 1 }), { a: 1 }, 'noop');
+});
+
+test('reducer with action', async (t) => {
+    const dux = new Updux({
+        actions: {
+            inc: null,
+        },
+        mutations: {
+            inc: () => u({ a: (x) => x + 1 }),
+        },
+    });
+
+    t.same(dux.reducer({ a: 1 }, { type: 'inc' }), { a: 2 });
+});