Run fiber tests just once on Travis (#8221)

Consolidate facts tracking with the other script.

.travis.yml

@@ -81,22 +81,7 @@ script:
       git checkout -- src/renderers/dom/shared/ReactDOMFeatureFlags.js
 
       echo 'Testing in fiber mode...'
-      printf '\nmodule.exports.useFiber = true;\n' \
-        >> src/renderers/dom/shared/ReactDOMFeatureFlags.js
-      FIBER_TESTS=`\
-        NODE_ENV=test node node_modules/jest/bin/jest --json | \
-        node -e "\
-          var data = JSON.parse(require('fs').readFileSync('/dev/stdin', 'utf8')); \
-          console.log(data.numPassedTests + '/' + data.numTotalTests)\
-        "\
-      `
-      git checkout -- src/renderers/dom/shared/ReactDOMFeatureFlags.js
-      node scripts/facts-tracker/index.js \
-        "fiber-tests" "$FIBER_TESTS"
-
-      # Should consolidate this with the above fiber run
-      echo 'Testing in fiber mode against test records...'
-      scripts/fiber/record-tests
+      scripts/fiber/record-tests --track-facts
       git --no-pager diff scripts/fiber
       FIBER_TESTS_STATUS=$(git status --porcelain scripts/fiber)
       test -z "$FIBER_TESTS_STATUS"

package.json

@@ -70,7 +70,8 @@
     "tmp": "~0.0.28",
     "typescript": "~1.8.10",
     "uglify-js": "^2.5.0",
-    "uglifyify": "^3.0.1"
+    "uglifyify": "^3.0.1",
+    "yargs": "^6.3.0"
   },
   "devEngines": {
     "node": "4.x || 5.x || 6.x || 7.x",

scripts/fiber/record-tests

@@ -2,6 +2,7 @@
 
 'use strict';
 
+const child_process = require('child_process');
 const crypto = require('crypto');
 const fs = require('fs');
 const os = require('os');
@@ -84,7 +85,7 @@ function formatResults(runResults, predicate) {
   return formatted.join('\n\n');
 }
 
-function recordTests() {
+function recordTests(trackFacts) {
   process.env.REACT_DOM_JEST_USE_FIBER = true;
   runJest()
     .then((runResults) => {
@@ -104,11 +105,34 @@ function recordTests() {
         path.join(__dirname, 'tests-failing.txt'),
         failing + '\n'
       );
+
+      if (trackFacts) {
+        const fact = runResults.numPassedTests + '/' + runResults.numTotalTests;
+        // TODO: Shelling out here is silly.
+        child_process.spawnSync(
+          process.execPath,
+          [
+            path.join(__dirname, '../facts-tracker/index.js'),
+            'fiber-tests',
+            fact,
+          ],
+          {
+            stdio: 'inherit',
+          }
+        );
+      }
     });
 }
 
 if (require.main === module) {
-  recordTests();
+  const argv = require('yargs')
+    .demand(0, 0)
+    .boolean('track-facts')
+    .describe('track-facts', 'Use facts-tracker to record passing tests.')
+    .strict()
+    .help()
+    .argv;
+  recordTests(argv.trackFacts);
 }
 
 module.exports = {