test(checker): Add test suites for `getServiceByName`

+ TODO

src/services/checker/checker.spec.ts

@@ -2,6 +2,11 @@ import { expect } from 'chai'
 import { CheckerService, /* Service, */ CheckerItem, Checker } from '.'
 
 describe('Test #checker service', function () {
+  describe('TODO', () => {
+    it('Add opportunity abort check')
+    it('Not check if state field in pending state')
+  })
+
   describe('Real cases', () => {
     it('Check all registered services. Should returns array with bool state each service.', (done) => {
       const checker = new CheckerService()
@@ -95,7 +100,7 @@ describe('Test #checker service', function () {
         }
       })
 
-      checker.on('start', (service: CheckerItem) => {
+      checker.on(CheckerService.START, (service: CheckerItem) => {
         const expected = {
           name: 'test',
           state: 'pending',
@@ -105,7 +110,7 @@ describe('Test #checker service', function () {
         expect(service).to.contain(expected)
       })
 
-      checker.on('finish', (actual: CheckerItem) => {
+      checker.on(CheckerService.FINISH, (actual: CheckerItem) => {
         const expected = {
           name: 'test',
           state: 'resolve',
@@ -218,4 +223,35 @@ describe('Test #checker service', function () {
         .catch(done)
     })
   })
+
+  describe('`getServiceByName`', () => {
+    it('Try get unregistered service. Should return undefined', () => {
+      const checker = new CheckerService()
+
+      const actual = checker.getServiceByName('unknown service name')
+
+      expect(actual).to.be.equal(undefined)
+    })
+
+    it('Try get registered service. Should return CheckerItem of service', () => {
+      const checker = new CheckerService()
+      const service = {
+        async check () {
+          return Promise.resolve(true)
+        }
+      }
+      const expectedCheckerItem: CheckerItem = {
+        name: 'service',
+        instance: service,
+        state: 'init',
+        isActive: false
+      }
+
+      checker.registerService('service', service)
+      const actualCheckerItem = checker.getServiceByName('service')
+
+      expect(actualCheckerItem?.instance).to.be.eql(service)
+      expect(actualCheckerItem).to.be.eql(expectedCheckerItem)
+    })
+  })
 })