test: unit testing infrastrutcure/boxen

* Includes test for greenboxing

* Better name for test

* Move test next to the code tested

* test(infrastructure/boxen): replace snapshot testing

* test(infrastructure/boxen): using mock aproach to test

* test(infrastructure/boxen): should add margin if config is passed

jest.config.js

@@ -4,6 +4,6 @@ module.exports = {
   collectCoverageFrom: ['<rootDir>/src/**/*.js'],
   coverageDirectory: 'coverage',
   testEnvironment: 'node',
-  testMatch: ['<rootDir>/tests/**/*.test.js'],
+  testMatch: ['<rootDir>/tests/**/*.test.js', '<rootDir>/src/**/*.test.js'],
   verbose: true,
 }

src/infrastructure/boxen.test.js

@@ -0,0 +1,34 @@
+const boxen = require('boxen')
+const { greenBox } = require('./boxen')
+
+jest.mock('boxen')
+beforeEach(boxen.mockReset)
+
+test('Should call boxen with basic settings and return boxen content', async () => {
+  boxen.mockReturnValue('MOCKED VALUE')
+
+  const input = 'sample input'
+  const greenBoxConfig = {
+    padding: 1,
+    borderStyle: 'double',
+    borderColor: 'green',
+  }
+
+  const result = greenBox(input)
+
+  const boxenMockFirstCall = boxen.mock.calls[0]
+
+  expect(boxenMockFirstCall[0]).toEqual(input)
+  expect(boxenMockFirstCall[1]).toMatchObject(greenBoxConfig)
+
+  expect(result).toEqual('MOCKED VALUE')
+})
+
+test('Should add margin if config is passed', () => {
+  boxen.mockReturnValue('MOCKED VALUE')
+
+  greenBox('some input', { margin: 4 })
+
+  const boxenMockFirstCall = boxen.mock.calls[0]
+  expect(boxenMockFirstCall[1]).toMatchObject({ margin: 4 })
+})