Add tests

Author: Pytal

test/helpers/parse.test.ts

@@ -0,0 +1,61 @@
+import { parseArgv } from '../../src/helpers/parse'
+
+
+test( 'deploymentEnv arg is parsed into same deploymentEnv string', () => {
+  const argv = [,,'production']
+
+  expect(parseArgv(argv)).toMatchObject({
+    deploymentEnv: 'production'
+  })
+})
+
+
+test( 'No ENV_VAR arg is parsed as null', () => {
+  const argv = [,,'production']
+
+  expect(parseArgv(argv)).toMatchObject({
+    varNameList: null
+  })
+})
+
+
+test( 'Single ENV_VAR arg is parsed into [string]', () => {
+  const argv = [,,'production','API_KEY']
+
+  expect(parseArgv(argv)).toMatchObject({
+    varNameList: ['API_KEY']
+  })
+})
+
+
+test( 'Multiple ENV_VAR args are parsed into string[]', () => {
+  const argv = [,,'production','API_KEY','SECRET','GRAPHQL_ENDPOINT']
+
+  expect(parseArgv(argv)).toMatchObject({
+    varNameList: ['API_KEY','SECRET','GRAPHQL_ENDPOINT']
+  })
+})
+
+
+test( 'Invalid arg shoud print help message to stdout', () => {
+  const argv = [,,'basilisk']
+
+  jest.spyOn(console, 'log')
+  // handle process.exit so test doesn't error
+  jest.spyOn(process, 'exit').mockImplementation()
+
+  parseArgv(argv)
+
+  const stdout = 'Usage: deploy-env [production | preview | development] [ENV_VAR]...'
+  expect(console.log).toHaveBeenCalledWith(stdout)
+})
+
+
+test( 'Invalid arg should exit process with code 9', () => {
+  const argv = [,,'basilisk']
+
+  parseArgv(argv)
+
+  const exitCode = 9
+  expect(process.exit).toHaveBeenCalledWith(exitCode)
+})