1 files changed, 27 insertions, 0 deletions
diff --git a/src/test/java/io/trygvis/rules/acme/IpCalcTest.java b/src/test/java/io/trygvis/rules/acme/IpCalcTest.java
new file mode 100644
index 0000000..8b1e2c6
--- /dev/null
+++ b/src/test/java/io/trygvis/rules/acme/IpCalcTest.java
@@ -0,0 +1,27 @@
+package io.trygvis.rules.acme;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class IpCalcTest {
+
+    @Test
+    public void basic() {
+        Assertions.assertThrows(IllegalArgumentException.class, () -> IpCalc.cidr("192.168.1.1/24").addresses());
+        assertEquals(256, IpCalc.cidr("192.168.1.0/24").addresses().size());
+        assertEquals(128, IpCalc.cidr("192.168.1.128/25").addresses().size());
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {
+            "192.168.1.0/24",
+            "192.168.1.128/25",
+    })
+    public void testParsing(String s) {
+        assertEquals(s, IpCalc.cidr(s).toString());
+    }
+}