From 9c94c0808977ac1047073f5fc5a50426be94d0e3 Mon Sep 17 00:00:00 2001
From: Sergii Mykyteiek <sergii.mykyteiek@itrexgroup.com>
Date: Wed, 6 Oct 2021 14:53:12 +0300
Subject: [PATCH] LT-9: Cover stack services with tests

---
 src/modules/stack/stack.controller.spec.ts    |  2 +-
 src/modules/stack/stack.repository.spec.ts    | 70 +++++++++++++++++++
 .../stack.validation-service.spec.ts          | 60 ++++++++++++++++
 3 files changed, 131 insertions(+), 1 deletion(-)
 create mode 100644 src/modules/stack/stack.repository.spec.ts
 create mode 100644 src/modules/stack/validation/stack.validation-service.spec.ts

diff --git a/src/modules/stack/stack.controller.spec.ts b/src/modules/stack/stack.controller.spec.ts
index 1119c40..b322130 100644
--- a/src/modules/stack/stack.controller.spec.ts
+++ b/src/modules/stack/stack.controller.spec.ts
@@ -95,4 +95,4 @@ describe('StackController', () => {
             expect(mockResponse.json).toBeCalledWith(response);
         });
     });
-})
\ No newline at end of file
+});
diff --git a/src/modules/stack/stack.repository.spec.ts b/src/modules/stack/stack.repository.spec.ts
new file mode 100644
index 0000000..b54f897
--- /dev/null
+++ b/src/modules/stack/stack.repository.spec.ts
@@ -0,0 +1,70 @@
+import 'reflect-metadata';
+import { Container } from 'typedi';
+import { StackModel } from './stack.model';
+import { StackRepository } from './stack.repository';
+
+describe('StackRepository', () => {
+    let stackModel;
+    let stackRepository: StackRepository;
+
+    beforeEach(() => {
+        stackModel = Container.get(StackModel);
+        stackRepository = Container.get(StackRepository);
+    });
+
+    afterEach(() => {
+        jest.clearAllMocks();
+    });
+
+    describe('add', () => {
+        it('Should return created item', () => {
+            const data = 'some data'
+            const dto = {
+                data,
+            };
+            jest.spyOn(stackModel, 'push').mockImplementation(() => dto);
+
+            const result = stackRepository.add(dto);
+
+            expect(stackModel.push).toBeCalledWith(dto.data);
+            expect(result).toHaveProperty('data');
+        });
+    });
+
+    describe('get', () => {
+        it('Should call pop method',  () => {
+            const data = 'some data'
+            const dto = {
+                data,
+            };
+            jest.spyOn(stackModel, 'pop').mockImplementation(() => dto);
+
+            const result = stackRepository.get();
+
+            expect(stackModel.pop).toBeCalled();
+            expect(result).toHaveProperty('data');
+        });
+    });
+
+    describe('isEmpty', () => {
+        it('When stack is empty -> should return true',  () => {
+            const length = 0;
+            jest.spyOn(stackModel, 'getLength').mockImplementation(() => length);
+
+            const result = stackRepository.isEmpty();
+
+            expect(stackModel.getLength).toBeCalled();
+            expect(result).toBe(true);
+        });
+
+        it('When stack is not empty -> should return false',  () => {
+            const length = 2;
+            jest.spyOn(stackModel, 'getLength').mockImplementation(() => length);
+
+            const result = stackRepository.isEmpty();
+
+            expect(stackModel.getLength).toBeCalled();
+            expect(result).toBe(false);
+        });
+    });
+});
diff --git a/src/modules/stack/validation/stack.validation-service.spec.ts b/src/modules/stack/validation/stack.validation-service.spec.ts
new file mode 100644
index 0000000..6f8ac79
--- /dev/null
+++ b/src/modules/stack/validation/stack.validation-service.spec.ts
@@ -0,0 +1,60 @@
+import 'reflect-metadata';
+import { Container } from 'typedi';
+import { StackValidationService } from './stack.validation-service';
+
+describe('StackValidationService', () => {
+    let validateService: StackValidationService;
+
+    beforeEach(() => {
+        validateService = Container.get(StackValidationService);
+    });
+
+    afterEach(() => {
+        jest.clearAllMocks();
+    });
+
+    describe('validateBody',  () => {
+        describe('When body does not pass validation', () => {
+            it('When body has extra properties -> should return errors',  async () => {
+                const body = {
+                    data: 'some data',
+                    extra: 100,
+                };
+
+                const errors = await validateService.validateBody(body);
+
+                expect(errors.length).not.toBe(0);
+            });
+
+            it('When body is empty -> should return errors',  async () => {
+                const body: any = {};
+
+                const errors = await validateService.validateBody(body);
+
+                expect(errors.length).not.toBe(0);
+            });
+
+            it('When body wrong fields -> should return errors',  async () => {
+                const body: any = {
+                    dara: 6,
+                };
+
+                const errors = await validateService.validateBody(body);
+
+                expect(errors.length).not.toBe(0);
+            });
+        });
+
+        describe('When body pass validation', () => {
+            it('Should return empty array of errors',  async () => {
+                const body = {
+                    data: 'some data',
+                };
+
+                const errors = await validateService.validateBody(body);
+
+                expect(errors.length).toBe(0);
+            });
+        })
+    });
+});
-- 
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