feat: update to support babel configuration object

Author: Justin Helmer

README.md

@@ -85,6 +85,57 @@ To define a babelrc file that vue-jest will use when transpiling javascript, you
 }
 ```
 
+You can also directly supply babel options
+
+```json
+{
+  "jest": {
+    "globals": {
+      "vue-jest": {
+        "babelOptions": {
+          "presets": [
+            [
+              "env",
+              {
+                "useBuiltIns": "entry",
+                "shippedProposals": true
+              }
+            ]
+          ],
+          "plugins": [
+            "syntax-dynamic-import"
+          ],
+          "env": {
+            "test": {
+              "plugins": [
+                "dynamic-import-node"
+              ]
+            }
+          }
+        }
+      }
+    }
+  }
+}
+```
+
+This can be used to support a [project-wide configuration](https://babeljs.io/docs/en/config-files#project-wide-configuration) file:
+
+```json
+{
+  "jest": {
+    "globals": {
+      "vue-jest": {
+        "babelOptions": {
+          "configFile": "/path/to/babel.config.js"
+        }
+      }
+    }
+  }
+}
+```
+> *Tip:* Need programmatic configuration? Use the [--config](https://jestjs.io/docs/en/cli.html#config-path) option in Jest CLI, and export a `.js` file
+
 ### Supported template languages
 
 - **pug** (`lang="pug"`)

lib/load-babel-config.js

@@ -17,6 +17,8 @@ module.exports = function getBabelConfig (vueJestConfig) {
       babelConfig = JSON.parse(readFileSync(vueJestConfig.babelRcFile))
     } else if (existsSync('babel.config.js')) {
       babelConfig = require(path.resolve('babel.config.js'))
+    } else if (vueJestConfig.babelOptions) {
+      babelConfig = vueJestConfig.babelOptions
     } else {
       const { file, config } = findBabelConfig.sync(process.cwd(), 0)
 

test/load-babel-config.spec.js

@@ -75,4 +75,14 @@ describe('load-babel-config.js', () => {
     expect(babelConfig).toEqual(config)
     unlinkSync(babelConfigPath)
   })
+
+  it('supports a babel options configuration object', () => {
+    const config = {
+      plugins: ['foo']
+    }
+    const babelConfig = loadBabelConfig({
+      babelOptions: config
+    })
+    expect(babelConfig).toEqual(config)
+  })
 })