1 files changed, 35 insertions, 0 deletions
diff --git a/config-provisioning/src/test/java/com/yahoo/config/provision/HostNameTest.java b/config-provisioning/src/test/java/com/yahoo/config/provision/HostNameTest.java
new file mode 100644
index 00000000000..da01920cc57
--- /dev/null
+++ b/config-provisioning/src/test/java/com/yahoo/config/provision/HostNameTest.java
@@ -0,0 +1,35 @@
+// 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.Test;
+
+import static org.junit.Assert.assertThrows;
+
+/**
+ * @author jonmv
+ */
+public class HostNameTest {
+
+    @Test
+    public void testNames() {
+        HostName.of("name-123.0.321-eman");
+        HostName.of(("." + "a".repeat(32)).repeat(2).substring(1, 65));
+        HostName.of("123");
+
+        assertThrows(IllegalArgumentException.class, () -> HostName.of("_"));
+        assertThrows(IllegalArgumentException.class, () -> HostName.of("-"));
+        assertThrows(IllegalArgumentException.class, () -> HostName.of("."));
+        assertThrows(IllegalArgumentException.class, () -> HostName.of("-foo"));
+        assertThrows(IllegalArgumentException.class, () -> HostName.of("foo-"));
+        assertThrows(IllegalArgumentException.class, () -> HostName.of(".foo"));
+        assertThrows(IllegalArgumentException.class, () -> HostName.of("foo."));
+        assertThrows(IllegalArgumentException.class, () -> HostName.of("foo..bar"));
+        assertThrows(IllegalArgumentException.class, () -> HostName.of("foo.-.bar"));
+        assertThrows(IllegalArgumentException.class, () -> HostName.of("foo/"));
+        assertThrows(IllegalArgumentException.class, () -> HostName.of("foo%"));
+        assertThrows(IllegalArgumentException.class, () -> HostName.of(("." + "a".repeat(32)).repeat(2).substring(1, 66)));
+        assertThrows(IllegalArgumentException.class, () -> HostName.of("a".repeat(64)));
+    }
+
+}
+