@grafana/e2e: generate JSON report file (#25033)

* Output JSON report from Cypress

* Updated lockfile

packages/grafana-e2e/cypress.json

@@ -1,4 +1,4 @@
 {
-  "supportFile": "cypress/support/index.ts",
-  "projectId": "zb7k1c"
+  "projectId": "zb7k1c",
+  "supportFile": "cypress/support/index.ts"
 }

packages/grafana-e2e/cypress/plugins/extendConfig.js

@@ -14,6 +14,10 @@ module.exports = async baseConfig => {
     const projectConfig = {
       fixturesFolder: `${CWD}/cypress/fixtures`,
       integrationFolder: `${CWD}/cypress/integration`,
+      reporter: '@mochajs/json-file-reporter', // putting this in cypress.json caused weird errors
+      reporterOptions: {
+        output: `${CWD}/cypress/report.json`,
+      },
       screenshotsFolder: `${CWD}/cypress/screenshots`,
       videosFolder: `${CWD}/cypress/videos`,
     };
@@ -46,14 +50,23 @@ module.exports = async baseConfig => {
       .catch(error => {
         if (error.code === 'ENOENT') {
           // File is optional
-          return null;
+          return {};
         } else {
           // Unexpected error
           throw error;
         }
       });
 
-    return { ...baseConfig, ...projectConfig, ...customProjectConfig };
+    return {
+      ...baseConfig,
+      ...projectConfig,
+      ...customProjectConfig,
+      reporterOptions: {
+        ...baseConfig.reporterOptions,
+        ...projectConfig.reporterOptions,
+        ...customProjectConfig.reporterOptions,
+      },
+    };
   } else {
     // Temporary legacy support for Grafana core (using `yarn start`)
     return baseConfig;

packages/grafana-e2e/package.json

@@ -46,6 +46,7 @@
     "@cypress/webpack-preprocessor": "4.1.3",
     "@grafana/e2e-selectors": "7.1.0-pre.0",
     "@grafana/tsconfig": "^1.0.0-rc1",
+    "@mochajs/json-file-reporter": "^1.2.0",
     "blink-diff": "1.0.13",
     "commander": "5.0.0",
     "cypress": "4.5.0",