runner-container-hooks/packages/k8s/tests/k8s-utils-test.ts

import * as fs from 'fs'
import { containerPorts, POD_VOLUME_NAME } from '../src/k8s'
import {
  containerVolumes,
  generateContainerName,
  writeEntryPointScript
} from '../src/k8s/utils'
import { TestHelper } from './test-setup'

let testHelper: TestHelper

describe('k8s utils', () => {
  describe('write entrypoint', () => {
    beforeEach(async () => {
      testHelper = new TestHelper()
      await testHelper.initialize()
    })

    afterEach(async () => {
      await testHelper.cleanup()
    })

    it('should not throw', () => {
      expect(() =>
        writeEntryPointScript(
          '/test',
          'sh',
          ['-e', 'script.sh'],
          ['/prepend/path'],
          {
            SOME_ENV: 'SOME_VALUE'
          }
        )
      ).not.toThrow()
    })

    it('should throw if RUNNER_TEMP is not set', () => {
      delete process.env.RUNNER_TEMP
      expect(() =>
        writeEntryPointScript(
          '/test',
          'sh',
          ['-e', 'script.sh'],
          ['/prepend/path'],
          {
            SOME_ENV: 'SOME_VALUE'
          }
        )
      ).toThrow()
    })

    it('should return object with containerPath and runnerPath', () => {
      const { containerPath, runnerPath } = writeEntryPointScript(
        '/test',
        'sh',
        ['-e', 'script.sh'],
        ['/prepend/path'],
        {
          SOME_ENV: 'SOME_VALUE'
        }
      )
      expect(containerPath).toMatch(/\/__w\/_temp\/.*\.sh/)
      const re = new RegExp(`${process.env.RUNNER_TEMP}/.*\\.sh`)
      expect(runnerPath).toMatch(re)
    })

    it('should write entrypoint path and the file should exist', () => {
      const { runnerPath } = writeEntryPointScript(
        '/test',
        'sh',
        ['-e', 'script.sh'],
        ['/prepend/path'],
        {
          SOME_ENV: 'SOME_VALUE'
        }
      )
      expect(fs.existsSync(runnerPath)).toBe(true)
    })
  })

  describe('container volumes', () => {
    beforeEach(async () => {
      testHelper = new TestHelper()
      await testHelper.initialize()
    })

    afterEach(async () => {
      await testHelper.cleanup()
    })

    it('should throw if container action and GITHUB_WORKSPACE env is not set', () => {
      delete process.env.GITHUB_WORKSPACE
      expect(() => containerVolumes([], true, true)).toThrow()
      expect(() => containerVolumes([], false, true)).toThrow()
    })

    it('should always have work mount', () => {
      let volumes = containerVolumes([], true, true)
      expect(volumes.find(e => e.mountPath === '/__w')).toBeTruthy()
      volumes = containerVolumes([], true, false)
      expect(volumes.find(e => e.mountPath === '/__w')).toBeTruthy()
      volumes = containerVolumes([], false, true)
      expect(volumes.find(e => e.mountPath === '/__w')).toBeTruthy()
      volumes = containerVolumes([], false, false)
      expect(volumes.find(e => e.mountPath === '/__w')).toBeTruthy()
    })

    it('should have container action volumes', () => {
      let volumes = containerVolumes([], true, true)
      let workspace = volumes.find(e => e.mountPath === '/github/workspace')
      let fileCommands = volumes.find(
        e => e.mountPath === '/github/file_commands'
      )
      expect(workspace).toBeTruthy()
      expect(workspace?.subPath).toBe('repo/repo')
      expect(fileCommands).toBeTruthy()
      expect(fileCommands?.subPath).toBe('_temp/_runner_file_commands')

      volumes = containerVolumes([], false, true)
      workspace = volumes.find(e => e.mountPath === '/github/workspace')
      fileCommands = volumes.find(e => e.mountPath === '/github/file_commands')
      expect(workspace).toBeTruthy()
      expect(workspace?.subPath).toBe('repo/repo')
      expect(fileCommands).toBeTruthy()
      expect(fileCommands?.subPath).toBe('_temp/_runner_file_commands')
    })

    it('should have externals, github home and github workflow mounts if job container', () => {
      const volumes = containerVolumes()
      expect(volumes.find(e => e.mountPath === '/__e')).toBeTruthy()
      expect(volumes.find(e => e.mountPath === '/github/home')).toBeTruthy()
      expect(volumes.find(e => e.mountPath === '/github/workflow')).toBeTruthy()
    })

    it('should throw if user volume source volume path is not in workspace', () => {
      expect(() =>
        containerVolumes(
          [
            {
              sourceVolumePath: '/outside/of/workdir'
            }
          ],
          true,
          false
        )
      ).toThrow()
    })

    it(`all volumes should have name ${POD_VOLUME_NAME}`, () => {
      let volumes = containerVolumes([], true, true)
      expect(volumes.every(e => e.name === POD_VOLUME_NAME)).toBeTruthy()
      volumes = containerVolumes([], true, false)
      expect(volumes.every(e => e.name === POD_VOLUME_NAME)).toBeTruthy()
      volumes = containerVolumes([], false, true)
      expect(volumes.every(e => e.name === POD_VOLUME_NAME)).toBeTruthy()
      volumes = containerVolumes([], false, false)
      expect(volumes.every(e => e.name === POD_VOLUME_NAME)).toBeTruthy()
    })

    it('should parse container ports', () => {
      const tt = [
        {
          spec: '8080:80',
          want: {
            containerPort: 80,
            hostPort: 8080,
            protocol: 'TCP'
          }
        },
        {
          spec: '8080:80/udp',
          want: {
            containerPort: 80,
            hostPort: 8080,
            protocol: 'UDP'
          }
        },
        {
          spec: '8080/udp',
          want: {
            containerPort: 8080,
            hostPort: undefined,
            protocol: 'UDP'
          }
        },
        {
          spec: '8080',
          want: {
            containerPort: 8080,
            hostPort: undefined,
            protocol: 'TCP'
          }
        }
      ]

      for (const tc of tt) {
        const got = containerPorts({ portMappings: [tc.spec] })
        for (const [key, value] of Object.entries(tc.want)) {
          expect(got[0][key]).toBe(value)
        }
      }
    })

    it('should throw when ports are out of range (0, 65536)', () => {
      expect(() => containerPorts({ portMappings: ['65536'] })).toThrow()
      expect(() => containerPorts({ portMappings: ['0'] })).toThrow()
      expect(() => containerPorts({ portMappings: ['65536/udp'] })).toThrow()
      expect(() => containerPorts({ portMappings: ['0/udp'] })).toThrow()
      expect(() => containerPorts({ portMappings: ['1:65536'] })).toThrow()
      expect(() => containerPorts({ portMappings: ['65536:1'] })).toThrow()
      expect(() => containerPorts({ portMappings: ['1:65536/tcp'] })).toThrow()
      expect(() => containerPorts({ portMappings: ['65536:1/tcp'] })).toThrow()
      expect(() => containerPorts({ portMappings: ['1:'] })).toThrow()
      expect(() => containerPorts({ portMappings: [':1'] })).toThrow()
      expect(() => containerPorts({ portMappings: ['1:/tcp'] })).toThrow()
      expect(() => containerPorts({ portMappings: [':1/tcp'] })).toThrow()
    })

    it('should throw on multi ":" splits', () => {
      expect(() => containerPorts({ portMappings: ['1:1:1'] })).toThrow()
    })

    it('should throw on multi "/" splits', () => {
      expect(() => containerPorts({ portMappings: ['1:1/tcp/udp'] })).toThrow()
      expect(() => containerPorts({ portMappings: ['1/tcp/udp'] })).toThrow()
    })
  })

  describe('generate container name', () => {
    it('should return the container name from image string', () => {
      expect(
        generateContainerName('public.ecr.aws/localstack/localstack')
      ).toEqual('localstack')
      expect(
        generateContainerName(
          'public.ecr.aws/url/with/multiple/slashes/postgres:latest'
        )
      ).toEqual('postgres')
      expect(generateContainerName('postgres')).toEqual('postgres')
      expect(generateContainerName('postgres:latest')).toEqual('postgres')
      expect(generateContainerName('localstack/localstack')).toEqual(
        'localstack'
      )
      expect(generateContainerName('localstack/localstack:latest')).toEqual(
        'localstack'
      )
    })

    it('should throw on invalid image string', () => {
      expect(() =>
        generateContainerName('localstack/localstack/:latest')
      ).toThrow()
      expect(() => generateContainerName(':latest')).toThrow()
    })
  })
})