fix(MockInstance): resetting scopes on each level

Author: satanTime

tests/mock-instance-reset/backup.spec.ts

@@ -0,0 +1,46 @@
+let globalVar = 0;
+
+const backupTest = (newValue: typeof globalVar): void => {
+  let backup: typeof globalVar;
+
+  beforeEach(() => {
+    backup = globalVar;
+    globalVar = newValue;
+  });
+
+  afterEach(() => {
+    globalVar = backup;
+  });
+};
+
+describe('mock-instance-reset:backup', () => {
+  it('equals 0 before all', () => {
+    expect(globalVar).toEqual(0);
+  });
+
+  describe('globalVar', () => {
+    backupTest(1);
+    backupTest(2);
+
+    it('equals 2 before each', () => {
+      expect(globalVar).toEqual(2);
+    });
+
+    describe('each', () => {
+      backupTest(3);
+      backupTest(4);
+
+      it('equals 4 after each', () => {
+        expect(globalVar).toEqual(4);
+      });
+    });
+
+    it('resets to 2 after each', () => {
+      expect(globalVar).toEqual(2);
+    });
+  });
+
+  it('resets to 0 after all', () => {
+    expect(globalVar).toEqual(0);
+  });
+});

tests/mock-instance-reset/test.spec.ts

@@ -0,0 +1,68 @@
+const triggers: string[] = [];
+
+describe('mock-instance-reset', () => {
+  describe('test', () => {
+    beforeAll(() => triggers.push('beforeAll:1'));
+    afterAll(() => triggers.push('afterAll:1'));
+
+    beforeAll(() => triggers.push('beforeAll:2'));
+    afterAll(() => triggers.push('afterAll:2'));
+
+    beforeEach(() => triggers.push('beforeEach:1'));
+    beforeEach(() => triggers.push('beforeEach:2'));
+
+    afterEach(() => triggers.push('afterEach:1'));
+    afterEach(() => triggers.push('afterEach:2'));
+
+    it('triggers test #1', () => {
+      expect(1).toEqual(1);
+    });
+
+    it('triggers test #2', () => {
+      expect(2).toEqual(2);
+    });
+
+    describe('nested', () => {
+      beforeAll(() => triggers.push('beforeAll:3'));
+      afterAll(() => triggers.push('afterAll:3'));
+
+      beforeEach(() => triggers.push('beforeEach:3'));
+      afterEach(() => triggers.push('afterEach:3'));
+
+      it('triggers test #3', () => {
+        expect(3).toEqual(3);
+      });
+    });
+  });
+
+  it('has expected order', () => {
+    // first before is called the first
+    // first after is called the last
+    expect(triggers).toEqual([
+      'beforeAll:1',
+      'beforeAll:2',
+
+      'beforeEach:1',
+      'beforeEach:2',
+      'afterEach:2',
+      'afterEach:1',
+
+      'beforeEach:1',
+      'beforeEach:2',
+      'afterEach:2',
+      'afterEach:1',
+
+      'beforeAll:3',
+      'beforeEach:1',
+      'beforeEach:2',
+      'beforeEach:3',
+      'afterEach:3',
+      'afterEach:2',
+      'afterEach:1',
+      'afterAll:3',
+
+      'afterAll:2',
+      'afterAll:1',
+    ]);
+  });
+});