Fixup tests & NIO version

Author: MrLotU

Package.swift

@@ -11,7 +11,7 @@ let package = Package(
     ],
     dependencies: [
         .package(url: "https://github.com/apple/swift-metrics.git", from: "1.0.0"),
-        .package(url: "https://github.com/apple/swift-nio.git", from: "2.0.0"),
+        .package(url: "https://github.com/apple/swift-nio.git", Version("1.0.0") ..< Version("3.0.0")),
     ],
     targets: [
         .target(

Sources/Prometheus/MetricTypes/Histogram.swift

@@ -158,9 +158,9 @@ extension PrometheusClient {
         if let histogram = histograms.first {
             return histogram
         } else {
-            let histogram = PromHistogram<T, U>(histogram.name, histogram.help, labels, histogram.upperBounds, self)
-            histogram.subHistograms.append(histogram)
-            return histogram
+            let newHistogram = PromHistogram<T, U>(histogram.name, histogram.help, labels, histogram.upperBounds, self)
+            histogram.subHistograms.append(newHistogram)
+            return newHistogram
         }
     }
 }

Sources/Prometheus/MetricTypes/Summary.swift

@@ -148,18 +148,18 @@ public class PromSummary<NumType: DoubleRepresentable, Labels: SummaryLabels>: P
 
 extension PrometheusClient {
     /// Helper for summaries & labels
-    fileprivate func getOrCreateSummary<T: Numeric, U: SummaryLabels>(withLabels labels: U, forSummary sum: PromSummary<T, U>) -> PromSummary<T, U> {
-        let summaries = sum.subSummaries.filter { (metric) -> Bool in
-            guard metric.name == sum.name, metric.help == sum.help, metric.labels == labels else { return false }
+    fileprivate func getOrCreateSummary<T: Numeric, U: SummaryLabels>(withLabels labels: U, forSummary summary: PromSummary<T, U>) -> PromSummary<T, U> {
+        let summaries = summary.subSummaries.filter { (metric) -> Bool in
+            guard metric.name == summary.name, metric.help == summary.help, metric.labels == labels else { return false }
             return true
         }
         if summaries.count > 2 { fatalError("Somehow got 2 summaries with the same data type") }
         if let summary = summaries.first {
             return summary
         } else {
-            let summary = PromSummary<T, U>(sum.name, sum.help, labels, sum.quantiles, self)
-            sum.subSummaries.append(summary)
-            return summary
+            let newSummary = PromSummary<T, U>(summary.name, summary.help, labels, summary.quantiles, self)
+            summary.subSummaries.append(newSummary)
+            return newSummary
         }
     }
 }

Tests/SwiftPrometheusTests/PrometheusMetricsTests.swift

@@ -1,4 +1,5 @@
 import XCTest
+@testable import Prometheus
 @testable import CoreMetrics
 @testable import PrometheusMetrics