Support partial infrastructure upgrades

1 files changed, 32 insertions, 0 deletions

diff --git a/config-provisioning/src/test/java/com/yahoo/config/provision/zone/NodeSliceTest.java b/config-provisioning/src/test/java/com/yahoo/config/provision/zone/NodeSliceTest.java
new file mode 100644
index 00000000000..b13eba5fa32
--- /dev/null
+++ b/config-provisioning/src/test/java/com/yahoo/config/provision/zone/NodeSliceTest.java
@@ -0,0 +1,32 @@
+// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.config.provision.zone;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * @author mpolden
+ */
+public class NodeSliceTest {
+
+    @Test
+    void node_slice() {
+        NodeSlice fraction = NodeSlice.fraction(0.6);
+        assertFalse(fraction.satisfiedBy(0, 4));
+        assertFalse(fraction.satisfiedBy(1, 4));
+        assertFalse(fraction.satisfiedBy(2, 4));
+        assertTrue(fraction.satisfiedBy(3, 4));
+        assertTrue(fraction.satisfiedBy(4, 4));
+        assertTrue(fraction.satisfiedBy(5, 4));
+
+        NodeSlice fixed = NodeSlice.minCount(5);
+        assertFalse(fixed.satisfiedBy(0, 5));
+        assertFalse(fixed.satisfiedBy(4, 5));
+        assertTrue(fixed.satisfiedBy(3, 3));
+        assertTrue(fixed.satisfiedBy(5, 5));
+        assertTrue(fixed.satisfiedBy(6, 5));
+    }
+
+}