1 files changed, 29 insertions, 0 deletions
diff --git a/jdisc_core/src/test/java/com/yahoo/jdisc/TimeBudgetTestCase.java b/jdisc_core/src/test/java/com/yahoo/jdisc/TimeBudgetTestCase.java
new file mode 100644
index 00000000000..5afc205beb3
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+++ b/jdisc_core/src/test/java/com/yahoo/jdisc/TimeBudgetTestCase.java
@@ -0,0 +1,29 @@
+// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.jdisc;
+
+import org.junit.Test;
+
+import java.time.Duration;
+import java.time.Instant;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+public class TimeBudgetTestCase {
+    private final Timer timer = mock(Timer.class);
+
+    @Test
+    public void testBasics() {
+        when(timer.currentTime()).thenReturn(Instant.ofEpochSecond(0));
+        TimeBudget timeBudget = TimeBudget.fromNow(timer, Duration.ofSeconds(10));
+
+        when(timer.currentTime()).thenReturn(Instant.ofEpochSecond(7));
+        assertEquals(Duration.ofSeconds(3), timeBudget.timeBeforeDeadline(Duration.ofSeconds(0)));
+        assertEquals(Duration.ofSeconds(1), timeBudget.timeBeforeDeadline(Duration.ofSeconds(2)));
+        assertEquals(Duration.ofSeconds(0), timeBudget.timeBeforeDeadline(Duration.ofSeconds(5)));
+
+        when(timer.currentTime()).thenReturn(Instant.ofEpochSecond(11));
+        assertEquals(Duration.ofSeconds(0), timeBudget.timeBeforeDeadline(Duration.ofSeconds(0)));
+    }
+}
+\ No newline at end of file