Merge pull request #32 from AlaeddineMessadi/add-counter-slice-tests

template/src/features/counter/counterSlice.spec.js

@@ -0,0 +1,35 @@
+import counter from './counterSlice'
+
+describe('counter reducer', () => {
+  it('should handle initial state', () => {
+    expect(counter(undefined, {})).toEqual({value: 0})
+  })
+
+
+  it('should handle increment', () => {
+    expect(
+      counter({ value: 3 }, {
+        type: 'counter/increment',
+      })
+    ).toEqual({ value: 4 });
+  });
+
+
+  it('should handle decrement', () => {
+    expect(
+      counter({ value: 4 }, {
+        type: 'counter/decrement',
+      })
+    ).toEqual({ value: 3 });
+  });
+
+
+  it('should handle incrementByAmount', () => {
+    expect(
+      counter({ value: 10 }, {
+        type: 'counter/incrementByAmount',
+        payload: 2
+      })
+    ).toEqual({ value: 12 });
+  });
+})