Add Ord instance tests for IPv4Address.

diff --git a/src/IPv4Address.hs b/src/IPv4Address.hs
index 80a499ec88f66e1907471ea7e0fb2af10ac9d5c3..7e502125722cbfb354a53d517acd206a3fe678ad 100644 (file)
--- a/src/IPv4Address.hs
+++ b/src/IPv4Address.hs
@@ -341,6 +341,10 @@ ipv4address_tests =
     test_minBound,
     test_most_sig_bit_different1,
     test_most_sig_bit_different2,
+    test_ord_instance1,
+    test_ord_instance2,
+    test_ord_instance3,
+    test_ord_instance4,
     test_to_enum ]
 
 ipv4address_properties :: TestTree
@@ -429,3 +433,45 @@ test_to_enum =
     desc     = "192.168.0.0 in base-10 is 3232235520"
     expected = mk_testaddr 192 168 0 0
     actual   = toEnum 3232235520 :: IPv4Address
+
+
+test_ord_instance1 :: TestTree
+test_ord_instance1 =
+  testCase desc $ actual @?= expected
+  where
+    desc     = "127.0.0.0 is less than 127.0.0.1"
+    addr1 = mk_testaddr 127 0 0 0
+    addr2 = mk_testaddr 127 0 0 1
+    expected = True
+    actual   = addr1 <= addr2
+
+
+test_ord_instance2 :: TestTree
+test_ord_instance2 =
+  testCase desc $ actual @?= expected
+  where
+    desc     = "127.0.0.0 is less than 127.0.1.0"
+    addr1 = mk_testaddr 127 0 0 0
+    addr2 = mk_testaddr 127 0 1 0
+    expected = True
+    actual   = addr1 <= addr2
+
+test_ord_instance3 :: TestTree
+test_ord_instance3 =
+  testCase desc $ actual @?= expected
+  where
+    desc     = "127.0.0.0 is less than 127.1.0.0"
+    addr1 = mk_testaddr 127 0 0 0
+    addr2 = mk_testaddr 127 1 0 0
+    expected = True
+    actual   = addr1 <= addr2
+
+test_ord_instance4 :: TestTree
+test_ord_instance4 =
+  testCase desc $ actual @?= expected
+  where
+    desc     = "127.0.0.0 is less than 128.0.0.0"
+    addr1 = mk_testaddr 127 0 0 0
+    addr2 = mk_testaddr 128 0 0 0
+    expected = True
+    actual   = addr1 <= addr2