Add IPv6Converter algorithm (#5783)

2025-12-19 07:00:35 +08:00 · 2024-10-26 14:27:14 +05:30
parent 009c2b38af
commit 6fc53ecc99
3 changed files with 164 additions and 0 deletions
--- a/src/test/java/com/thealgorithms/conversions/IPv6ConverterTest.java
+++ b/src/test/java/com/thealgorithms/conversions/IPv6ConverterTest.java
@@ -0,0 +1,64 @@
+package com.thealgorithms.conversions;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import java.net.UnknownHostException;
+import org.junit.jupiter.api.Test;
+
+public class IPv6ConverterTest {
+
+    private static final String VALID_IPV4 = "192."
+        + "0."
+        + "2."
+        + "128";
+    private static final String EXPECTED_IPV6_MAPPED = ":"
+        + ":ff"
+        + "ff"
+        + ":19"
+        + "2."
+        + "0."
+        + "2.128";
+    private static final String INVALID_IPV6_MAPPED = "2001:"
+        + "db8"
+        + ":"
+        + ":1";
+    private static final String INVALID_IPV4 = "999."
+        + "999."
+        + "999."
+        + "999";
+    private static final String INVALID_IPV6_FORMAT = "invalid:ipv6"
+        + "::address";
+    private static final String EMPTY_STRING = "";
+
+    @Test
+    public void testIpv4ToIpv6ValidInput() throws UnknownHostException {
+        String actualIpv6 = IPv6Converter.ipv4ToIpv6(VALID_IPV4);
+        assertEquals(EXPECTED_IPV6_MAPPED, actualIpv6);
+    }
+
+    @Test
+    public void testIpv6ToIpv4InvalidIPv6MappedAddress() {
+        assertThrows(IllegalArgumentException.class, () -> IPv6Converter.ipv6ToIpv4(INVALID_IPV6_MAPPED));
+    }
+
+    @Test
+    public void testIpv4ToIpv6InvalidIPv4Address() {
+        assertThrows(UnknownHostException.class, () -> IPv6Converter.ipv4ToIpv6(INVALID_IPV4));
+    }
+
+    @Test
+    public void testIpv6ToIpv4InvalidFormat() {
+        assertThrows(UnknownHostException.class, () -> IPv6Converter.ipv6ToIpv4(INVALID_IPV6_FORMAT));
+    }
+
+    @Test
+    public void testIpv4ToIpv6EmptyString() {
+        assertThrows(UnknownHostException.class, () -> IPv6Converter.ipv4ToIpv6(EMPTY_STRING));
+    }
+
+    @Test
+    public void testIpv6ToIpv4EmptyString() {
+        assertThrows(IllegalArgumentException.class, () -> IPv6Converter.ipv6ToIpv4(EMPTY_STRING));
+    }
+}