add reducers tests for undefined state

antonk52 · May 2, 2021 · f21f5a6 · f21f5a6
1 parent 3e81a3a
commit f21f5a6
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diff --git a/test/immer.test.ts b/test/immer.test.ts
@@ -37,6 +37,12 @@ describe('immer', () => {
         expect(result).toEqual({id: 123, result: 'loading'})
     });
 
+    it('accepts undefined as the state argument', () => {
+        const result = reducer(undefined, req.init(123));
+
+        expect(result).toEqual({id: 123, result: 'loading'})
+    });
+
     it('modifies state as expected by returning', () => {
         const st: State = {
             ...defaultState,

diff --git a/test/reducer.test.ts b/test/reducer.test.ts
@@ -35,6 +35,12 @@ describe('reducer', () => {
         expect(result).toEqual({id: 123, result: 'loading'})
     });
 
+    it('accepts undefined as the state argument', () => {
+        const result = reducer(undefined, req.init(123));
+
+        expect(result).toEqual({id: 123, result: 'loading'})
+    });
+
     it('does not modify state for unknown action', () => {
         const st: State = {
             ...defaultState,