test: only test CSFLE on LTS versions of node

Author: mbroadst

test/tools/runner/filters/client_encryption_filter.js

@@ -1,6 +1,8 @@
 'use strict';
 
 const mongodb = require('../../../../index');
+const semver = require('semver');
+
 /**
  * Filter for whether or not a test needs / doesn't need Client Side Encryption
  *
@@ -40,8 +42,11 @@ class ClientSideEncryptionFilter {
     const clientSideEncryption =
       test.metadata && test.metadata.requires && test.metadata.requires.clientSideEncryption;
 
+    // CSFLE is only supported on LTS versions of node
+    const nodeSupportsCSFLE = semver.satisfies(process.version, '>4');
+
     const ret = typeof clientSideEncryption !== 'boolean' || clientSideEncryption === this.enabled;
-    return ret;
+    return ret && nodeSupportsCSFLE;
   }
 }