test: Ensure file is closed after reading lines (#12990) (#13035)

Used a try-with-resources statement to ensure that log file gets closed after iterating over its contents. Co-authored-by: Marco Collovati <[email protected]>
vaadin · Feb 16, 2022 · fd33877 · fd33877
1 parent 4e7bbb4
commit fd33877
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/.../java/com/vaadin/flow/testnpmonlyfeatures/performanceregression/StartupPerformanceIT.java b/.../java/com/vaadin/flow/testnpmonlyfeatures/performanceregression/StartupPerformanceIT.java
@@ -22,6 +22,7 @@
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+import java.util.stream.Stream;
 
 import org.junit.Assert;
 import org.junit.Test;
@@ -70,8 +71,8 @@ private int measureLogEntryTimeDistance(String startFragment,
         Pattern endPattern = createPattern(endFragment);
         AtomicInteger startTime = new AtomicInteger();
         AtomicInteger endTime = new AtomicInteger();
-        try {
-            Files.lines(getLogPath()).forEach(line -> {
+        try (Stream<String> lines = Files.lines(getLogPath())) {
+            lines.forEach(line -> {
                 Matcher matcherFirst = startPattern.matcher(line);
                 if (matcherFirst.matches() && startTime.get() == 0) {
                     startTime.set(Integer.parseInt(matcherFirst.group(1)));