[cli] Fix running definition tests locally on MacOS (#4440)

* fix tests running on macos

* remove extra log

cli/src/commands/runTests.js

@@ -23,12 +23,28 @@ export type Args = {
   ...
 };
 
-// Used to decide which binary to fetch for each version of Flow
-const BIN_PLATFORM = (_ => {
+/**
+ * Used to decide which binary to fetch for each version of Flow.
+ *
+ * Return type matches the binaries returned by flow releases
+ * https://github.com/facebook/flow/releases
+ *
+ * eg: If the binary for the OS is `flow-linux-arm64-v0.206.0.zip`
+ * we will return `linux-arm64`
+ */
+const BIN_PLATFORM = (() => {
+  const arch = os.arch();
+
   switch (os.type()) {
     case 'Linux':
+      if (arch === 'arm') {
+        return 'linux-arm64';
+      }
       return 'linux64';
     case 'Darwin':
+      if (arch === 'arm') {
+        return 'osx-arm64';
+      }
       return 'osx';
     case 'Windows_NT':
       return 'win64';
@@ -37,6 +53,7 @@ const BIN_PLATFORM = (_ => {
       throw new Error('Unsupported os.type()! ' + os.type());
   }
 })();
+
 const PKG_ROOT_DIR = path.join(__dirname, '..', '..');
 const TEST_DIR = path.join(PKG_ROOT_DIR, '.test-dir');
 const BIN_DIR = path.join(PKG_ROOT_DIR, '.flow-bins-cache');
@@ -132,7 +149,7 @@ async function getOrderedFlowBinVersions(
     const GH_CLIENT = gitHubClient();
     // We only test against the latest numberOfReleases Versions
     const QUERY_PAGE_SIZE = numberOfReleases;
-    const OS_ARCH_FILTER_RE = new RegExp(`flow-${BIN_PLATFORM}`);
+    const OS_ARCH_FILTER_RE = new RegExp(`flow-${BIN_PLATFORM}-v`);
 
     let page = 0;
     const apiPayload = await GH_CLIENT.repos.listReleases({