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

node_modules/prom-client/lib/bucketGenerators.js

@@ -0,0 +1,31 @@
+'use strict';
+
+exports.linearBuckets = (start, width, count) => {
+	if (count < 1) {
+		throw new Error('Linear buckets needs a positive count');
+	}
+
+	const buckets = new Array(count);
+	for (let i = 0; i < count; i++) {
+		buckets[i] = start + i * width;
+	}
+	return buckets;
+};
+
+exports.exponentialBuckets = (start, factor, count) => {
+	if (start <= 0) {
+		throw new Error('Exponential buckets needs a positive start');
+	}
+	if (count < 1) {
+		throw new Error('Exponential buckets needs a positive count');
+	}
+	if (factor <= 1) {
+		throw new Error('Exponential buckets needs a factor greater than 1');
+	}
+	const buckets = new Array(count);
+	for (let i = 0; i < count; i++) {
+		buckets[i] = start;
+		start *= factor;
+	}
+	return buckets;
+};