Pin the version of Test262 used from test-e2e-intl

Summary:
Test262 is constantly updating and new Intl tests break test-e2e-intl job.
Instead of always downloading the latest `main` archive, we download a fixed
version of it pinned by a commit hash that we knew our allowlist/blocklist
had covered.

Reviewed By: mhorowitz

Differential Revision: D29949373

fbshipit-source-id: 32501a7cff76eded7496c4bb4bba800d08bd4b5e

.circleci/config.yml

@@ -690,5 +690,7 @@ jobs:
             adb logcat -c || true
             ./gradlew :intltest:preparetest262 && ./gradlew :intltest:connectedAndroidTest
             adb logcat -d > /tmp/hermes/output/adblog.txt
+            # Move report to output dir
+            mv /tmp/hermes/build_android /tmp/hermes/output/build_android
       - store_artifacts:
           path: /tmp/hermes/output/

android/intltest/build.gradle

@@ -18,32 +18,47 @@ import de.undercouch.gradle.tasks.download.Download
 buildDir = "${rootProject.ext.hermes_ws}/build_android/intltest"
 buildDir.mkdirs()
 
+// Download the test262 snapshot at c27f6a (June 30 2021).
+def test262CommitHash = "c27f6a5b9a30c219b3b95769d52dc587a9af61ab"
 def test262DownloadsDirPath = "${rootProject.ext.hermes_ws}/build_android/intltest/downloads/test262"
+def test262Staging = "${rootProject.ext.hermes_ws}/build_android/intltest/downloads/test262-staging"
 def test262Destination = "java/com/facebook/hermes/test/assets"
 task createDownloadsDir {
   new File(test262DownloadsDirPath).mkdirs()
 }
 
 task downloadTest262(dependsOn: createDownloadsDir, type: Download) {
-  src("https://github.com/tc39/test262/archive/main.zip")
+  src("https://github.com/tc39/test262/archive/${test262CommitHash}.zip")
   onlyIfNewer(true)
   overwrite(true)
   dest(new File(test262DownloadsDirPath, "test262.zip"))
 }
 
-task preparetest262(dependsOn: downloadTest262, type: Copy) {
-  from(zipTree(downloadTest262.dest))
-  include("test262-main/test/intl402/Collator/**/*.js")
-  include("test262-main/test/intl402/DateTimeFormat/**/*.js")
-  include("test262-main/test/intl402/NumberFormat/**/*.js")
-  include("test262-main/test/intl402/String/**/*.js")
-  include("test262-main/test/intl402/Number/**/*.js")
-  include("test262-main/test/intl402/Array/**/*.js")
-  include("test262-main/test/intl402/Date/**/*.js")
-  include("test262-main/test/intl402/Intl/**/*.js")
-  include("test262-main/harness/*.js")
-  includeEmptyDirs = true
-  into(test262Destination)
+task preparetest262(dependsOn: downloadTest262) {
+  doLast {
+    // Only include the Intl402 test from the downloaded test262.
+    copy{
+      from(zipTree(downloadTest262.dest)) {
+        include("test262-${test262CommitHash}/test/intl402/Collator/**/*.js")
+        include("test262-${test262CommitHash}/test/intl402/DateTimeFormat/**/*.js")
+        include("test262-${test262CommitHash}/test/intl402/NumberFormat/**/*.js")
+        include("test262-${test262CommitHash}/test/intl402/String/**/*.js")
+        include("test262-${test262CommitHash}/test/intl402/Number/**/*.js")
+        include("test262-${test262CommitHash}/test/intl402/Array/**/*.js")
+        include("test262-${test262CommitHash}/test/intl402/Date/**/*.js")
+        include("test262-${test262CommitHash}/test/intl402/Intl/**/*.js")
+        include("test262-${test262CommitHash}/harness/*.js")
+        includeEmptyDirs = false
+      }
+      into(test262Staging)
+    }
+    // Rename the unzipped dir as `test262-main` so the path is known to Java.
+    copy {
+      from("${test262Staging}/test262-${test262CommitHash}")
+      into("${test262Destination}/test262-main")
+    }
+    delete "${test262Staging}"
+  }
 }
 
 // TODO: Figure out how to deduplicate this file and intl/build.gradle