Merge pull request #18 from JoseRFelix/test/add-general-testing

Author: William Luke

jest.config.js

@@ -0,0 +1,7 @@
+module.exports = {
+  roots: ['<rootDir>/src'],
+  testMatch: ['**/__tests__/**/*.+(ts|tsx|js)', '**/?(*.)+(spec|test).+(ts|tsx|js)'],
+  transform: {
+    '^.+\\.(ts|tsx)$': 'ts-jest',
+  },
+}

package.json

@@ -30,18 +30,23 @@
     "dev:test-app": "cd test-app && yarn dev",
     "dev": "yarn watch & yarn dev:test-app",
     "build": "rimraf ./dist && tsc",
-    "stable": "dripip stable"
+    "stable": "dripip stable",
+    "test": "jest",
+    "test:watch": "jest --watch"
   },
   "dependencies": {},
   "devDependencies": {
     "@prisma-labs/prettier-config": "0.1.0",
+    "@types/jest": "^26.0.15",
     "@types/webpack": "4.41.22",
     "dripip": "0.10.0",
     "eslint": "7.10.0",
     "eslint-config-prettier": "6.12.0",
+    "jest": "^26.6.0",
     "prettier": "2.1.2",
     "prettier-eslint": "11.0.0",
     "rimraf": "^3.0.2",
+    "ts-jest": "^26.4.1",
     "typescript": "4.0.3",
     "webpack": "4.44.2"
   },

src/__tests__/index.test.ts

@@ -0,0 +1,24 @@
+import withPrismaPlugin from '../index'
+
+describe('withPrismaPlugin', () => {
+  it('should keep nextConfig object properties in other phases', () => {
+    const nextConfig = { foo: 'bar' }
+
+    const newConfig = withPrismaPlugin(nextConfig)('phase-export', {})
+    expect(newConfig).toEqual(nextConfig)
+  })
+
+  it('should call nextConfig function in other phases', () => {
+    const nextConfig = () => ({ foo: 'bar' })
+
+    const newConfig = withPrismaPlugin(nextConfig)('phase-export', {})
+    expect(newConfig).toEqual(nextConfig())
+  })
+
+  it('should add webpack property', () => {
+    const nextConfig = { foo: 'bar' }
+
+    const newConfig = withPrismaPlugin(nextConfig)('phase-development-server', {})
+    expect(newConfig).toHaveProperty('webpack')
+  })
+})

src/index.ts

@@ -6,45 +6,39 @@ const PATH_DELIMITER = '[\\\\/]' // match 2 antislashes or one slash
  * paths of the modules. So we need to check for \\ and /
  */
 // @ts-ignore
-const safePath = module => module.split(/[\\\/]/g).join(PATH_DELIMITER)
+const safePath = (module) => module.split(/[\\\/]/g).join(PATH_DELIMITER)
 
 /**
  * Actual Next.js plugin
  */
 
 const withPrismaPlugin = (nextConfig = {}) => (
-  phase:
-    | "phase-export"
-    | "phase-production-build"
-    | "phase-production-server"
-    | "phase-development-server",
-    thing: any
+  phase: 'phase-export' | 'phase-production-build' | 'phase-production-server' | 'phase-development-server',
+  thing: any
 ) => {
-  if (phase === "phase-development-server") {
+  if (phase === 'phase-development-server') {
     return Object.assign({}, nextConfig, {
       webpack(config: any, options: any) {
         const ignore = ['.prisma/client', '@prisma/client']
 
         // const includes = ignore.map(module => (new RegExp(`${module}(?!.*node_modules)`)));
-        const excludes = [new RegExp(`node_modules(?!/(${ignore.join('|')})(?!.*node_modules))`)];
-        const ignored = config.watchOptions.ignored.filter(
-          (ignored: string) => ignored !== '**/node_modules/**'
-        ).concat(excludes);
+        const excludes = [new RegExp(`node_modules(?!/(${ignore.join('|')})(?!.*node_modules))`)]
+        const ignored = config.watchOptions.ignored
+          .filter((ignored: string) => ignored !== '**/node_modules/**')
+          .concat(excludes)
         return Object.assign(config, {
           plugins: [...config.plugins, new PrismaClientReloaderWebpackPlugin()],
           watchOptions: {
             ...config.watchOptions,
-            ignored
-          }
+            ignored,
+          },
         })
-      }
+      },
     })
   }
-  let internalConfigObj =
-    typeof nextConfig === "function"
-      ? nextConfig(phase, thing)
-      : nextConfig;
-  return internalConfigObj;
+  let internalConfigObj = typeof nextConfig === 'function' ? nextConfig(phase, thing) : nextConfig
+  return internalConfigObj
 }
 
 module.exports = withPrismaPlugin
+export default withPrismaPlugin