test: added a test for writeFunctionConfiguration

Author: nickytonline

test/functions.spec.ts

@@ -0,0 +1,45 @@
+import { readJSON } from 'fs-extra'
+import mock from 'mock-fs'
+import { join } from 'pathe'
+import { NEXT_PLUGIN_NAME } from '../packages/runtime/src/constants'
+import { writeFunctionConfiguration } from '../packages/runtime/src/helpers/utilities/functions'
+
+describe('writeFunctionConfiguration', () => {
+  beforeEach(() => {
+    mock({
+      '.netlify/plugins/package.json': JSON.stringify({
+        name: 'test',
+        version: '1.0.0',
+        dependencies: {
+          '@netlify/plugin-nextjs': '1.0.0',
+        },
+      }),
+      '.netlify/functions/some-folder/someFunctionName/someFunctionName.json': '',
+    })
+  })
+
+  afterEach(() => {
+    mock.restore()
+  })
+
+  it('should write the configuration for a function', async () => {
+    const functionName = 'someFunctionName'
+    const functionTitle = 'some function title'
+    const functionsDir = '.netlify/functions/some-folder'
+    const nextPluginVersion = '1.0.0'
+
+    const expected = {
+      config: {
+        name: functionTitle,
+        generator: nextPluginVersion ? `${NEXT_PLUGIN_NAME}@${nextPluginVersion}` : 'Next Runtime Version Not Found',
+      },
+      version: 1,
+    }
+
+    const filePathToSaveTo = join(functionsDir, functionName, `${functionName}.json`)
+    await writeFunctionConfiguration(functionName, functionTitle, functionsDir)
+    const actual = await readJSON(filePathToSaveTo)
+
+    expect(actual).toEqual(expected)
+  })
+})