Partial IRI and IRI-reference test suite

These are just slightly changed versions of most of the URI and
URI-reference test suites.  I omitted a number of URI test cases,
particularly of different sorts of schemes.  It's not entirely
clear to me what the scope of the test suite should be, and I
just want to get something in place that hopefully someone with a
deeper understanding of IRI-related challenges can enhance.

Author: handrews

tests/draft7/optional/format.json

@@ -204,6 +204,93 @@
             }
         ]
     },
+    {
+        "description": "validation of IRIs",
+        "schema": {"format": "iri"},
+        "tests": [
+            {
+                "description": "a valid IRI with anchor tag",
+                "data": "http://ƒøø.ßår/?∂éœ=πîx#πîüx",
+                "valid": true
+            },
+            {
+                "description": "a valid IRI with anchor tag and parantheses",
+                "data": "http://ƒøø.com/blah_(wîkïpédiå)_blah#ßité-1",
+                "valid": true
+            },
+            {
+                "description": "a valid IRI with URL-encoded stuff",
+                "data": "http://ƒøø.ßår/?q=Test%20URL-encoded%20stuff",
+                "valid": true
+            },
+            {
+                "description": "a valid IRI with many special characters",
+                "data": "http://-.~_!$&'()*+,;=:%40:80%2f::::::@example.com",
+                "valid": true
+            },
+            {
+                "description": "a valid IRI based on IPv6",
+                "data": "http://2001:0db8:85a3:0000:0000:8a2e:0370:7334",
+                "valid": true
+            },
+            {
+                "description": "an invalid relative IRI Reference",
+                "data": "/abc",
+                "valid": false
+            },
+            {
+                "description": "an invalid IRI",
+                "data": "\\\\WINDOWS\\filëßåré",
+                "valid": false
+            },
+            {
+                "description": "an invalid IRI though valid IRI reference",
+                "data": "âππ",
+                "valid": false
+            }
+        ]
+    },
+    {
+        "description": "validation of IRI References",
+        "schema": {"format": "iri-reference"},
+        "tests": [
+            {
+                "description": "a valid IRI",
+                "data": "http://ƒøø.ßår/?∂éœ=πîx#πîüx",
+                "valid": true
+            },
+            {
+                "description": "a valid protocol-relative IRI Reference",
+                "data": "//ƒøø.ßår/?∂éœ=πîx#πîüx",
+                "valid": true
+            },
+            {
+                "description": "a valid relative IRI Reference",
+                "data": "/âππ",
+                "valid": true
+            },
+            {
+                "description": "an invalid IRI Reference",
+                "data": "\\\\WINDOWS\\filëßåré",
+                "valid": false
+            },
+            {
+                "description": "a valid IRI Reference",
+                "data": "âππ",
+                "valid": true
+            },
+            {
+                "description": "a valid IRI fragment",
+                "data": "#ƒrägmênt",
+                "valid": true
+            },
+            {
+                "description": "an invalid IRI fragment",
+                "data": "#ƒräg\\mênt",
+                "valid": false
+            }
+        ]
+    },
     {
         "description": "format: uri-template",
         "schema": {