Create singleton CloudNames for known clouds

1 files changed, 22 insertions, 0 deletions

diff --git a/config-provisioning/src/test/java/com/yahoo/config/provision/CloudNameTest.java b/config-provisioning/src/test/java/com/yahoo/config/provision/CloudNameTest.java
new file mode 100644
index 00000000000..b030233d459
--- /dev/null
+++ b/config-provisioning/src/test/java/com/yahoo/config/provision/CloudNameTest.java
@@ -0,0 +1,22 @@
+// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.config.provision;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertSame;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+/**
+ * @author freva
+ */
+class CloudNameTest {
+
+    @Test
+    void returns_same_instance_for_known_clouds() {
+        assertSame(CloudName.from("aws"), CloudName.AWS);
+        assertSame(CloudName.from("gcp"), CloudName.GCP);
+        assertSame(CloudName.from("default"), CloudName.DEFAULT);
+        assertSame(CloudName.from("yahoo"), CloudName.YAHOO);
+        assertThrows(IllegalArgumentException.class, () -> CloudName.from("aWs")); // Must be lower case
+    }
+}