setup integration test

node_modules/@octokit/rest/plugins/normalize-git-reference-responses/index.js

@@ -0,0 +1,53 @@
+module.exports = octokitRestNormalizeGitReferenceResponses
+
+const { RequestError } = require('@octokit/request-error')
+
+function octokitRestNormalizeGitReferenceResponses (octokit) {
+  octokit.hook.wrap('request', (request, options) => {
+    const isGetOrListRefRequest = /\/repos\/:?\w+\/:?\w+\/git\/refs\/:?\w+/.test(options.url)
+
+    if (!isGetOrListRefRequest) {
+      return request(options)
+    }
+
+    const isGetRefRequest = 'ref' in options
+
+    return request(options)
+      .then(response => {
+        // request single reference
+        if (isGetRefRequest) {
+          if (Array.isArray(response.data)) {
+            throw new RequestError(`More than one reference found for "${options.ref}"`, 404, {
+              request: options
+            })
+          }
+
+          // ✅ received single reference
+          return response
+        }
+
+        // request list of references
+        if (!Array.isArray(response.data)) {
+          response.data = [response.data]
+        }
+
+        return response
+      })
+
+      .catch(error => {
+        if (isGetRefRequest) {
+          throw error
+        }
+
+        if (error.status === 404) {
+          return {
+            status: 200,
+            headers: error.headers,
+            data: []
+          }
+        }
+
+        throw error
+      })
+  })
+}