Update test framework: fix run_tests.py to support all test files, add auto-import-check for test files

node_modules/prom-client/lib/metrics/helpers/safeMemoryUsage.js

@@ -0,0 +1,12 @@
+'use strict';
+
+// process.memoryUsage() can throw on some platforms, see #67
+function safeMemoryUsage() {
+	try {
+		return process.memoryUsage();
+	} catch {
+		return;
+	}
+}
+
+module.exports = safeMemoryUsage;