Measure elapsed time with System.nanoTime() in tests

Signed-off-by: Björn Michael <[email protected]> Closes junit-team#3621
sbrannen · Dec 30, 2023 · 8baf93c · 8baf93c
1 parent 6ae587f
commit 8baf93c
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Showing 2 changed files with 4 additions and 4 deletions.
diff --git a/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/AssertTimeoutAssertionsTests.java b/junit-jupiter-engine/src/test/java/org/junit/jupiter/api/AssertTimeoutAssertionsTests.java
@@ -158,11 +158,11 @@ void assertTimeoutWithMessageSupplierForSupplierThatCompletesAfterTheTimeout() {
 	 * Take a nap for 100 milliseconds.
 	 */
 	private void nap() throws InterruptedException {
-		long start = System.currentTimeMillis();
+		long start = System.nanoTime();
 		// workaround for imprecise clocks (yes, Windows, I'm talking about you)
 		do {
 			Thread.sleep(100);
-		} while (System.currentTimeMillis() - start < 100);
+		} while (System.nanoTime() - start < 100_000_000L);
 	}
 
 }
diff --git a/...upiter-engine/src/test/kotlin/org/junit/jupiter/api/KotlinAssertTimeoutAssertionsTests.kt b/...upiter-engine/src/test/kotlin/org/junit/jupiter/api/KotlinAssertTimeoutAssertionsTests.kt
@@ -270,11 +270,11 @@ internal class KotlinAssertTimeoutAssertionsTests {
      * Take a nap for 100 milliseconds.
      */
     private fun nap() {
-        val start = System.currentTimeMillis()
+        val start = System.nanoTime()
         // workaround for imprecise clocks (yes, Windows, I'm talking about you)
         do {
             Thread.sleep(100)
-        } while (System.currentTimeMillis() - start < 100)
+        } while (System.nanoTime() - start < 100_000_000L)
     }
 
     private fun waitForInterrupt() {