Add rules and test for type keyword, draft 3 to draft 4 (#27)

Author: suprith-hub

rules/from-draft3/to-draft4/010-type-has-value-equals-any.json

@@ -0,0 +1,10 @@
+{
+    "vocabulary": "core",
+    "condition": [ 
+        { "operation": "has-key", "path": [], "value": "type" },
+        { "operation": "equals", "path": [ "type" ], "value": "any" }
+    ],
+    "transform": [
+        { "operation": "remove", "path": [ "type" ] } 
+    ]
+}

rules/from-draft3/to-draft4/011-type-has-any-in-its-array.json

@@ -0,0 +1,11 @@
+{
+    "vocabulary": "core",
+    "condition": [ 
+        { "operation": "has-key", "path": [], "value": "type" },
+        { "operation": "type-is", "path": [ "type" ], "value": "array" },
+        { "operation": "equals", "path": [ "type", {} ], "value": "any" } 
+    ],
+    "transform": [
+        { "operation": "remove", "path": [ "type" ] } 
+    ]
+}

rules/from-draft3/to-draft4/012-type-has-atleast-one-object-in-its-array-anyOf-absent.json

@@ -0,0 +1,12 @@
+{
+    "vocabulary": "core",
+    "condition": [ 
+        { "operation": "has-key", "path": [], "value": "type" },
+        { "operation": "not-has-key", "path": [], "value": "anyOf" },
+        { "operation": "type-is", "path": [ "type" ], "value": "array" },
+        { "operation": "contains-type", "path": [ "type" ], "value": "object" }
+    ],
+    "transform": [
+        { "operation": "add", "path": [ "anyOf" ], "value": [] }
+    ]
+}

rules/from-draft3/to-draft4/013-type-has-objects-and-strings-in-its-array-initialize.json

@@ -0,0 +1,12 @@
+{
+    "vocabulary": "core",
+    "condition": [ 
+        { "operation": "has-key", "path": [], "value": "type" },
+        { "operation": "type-is", "path": [ "type" ], "value": "array" },
+        { "operation": "contains-type", "path": [ "type" ], "value": "object" },
+        { "operation": "contains-type", "path": [ "type" ], "value": "string" }
+    ],
+    "transform": [
+        { "operation": "add", "path": [ "anyOf", "-" ], "value": { "type": [] } }
+    ]
+}

rules/from-draft3/to-draft4/014-type-has-objects-and-strings-in-its-array.json

@@ -0,0 +1,12 @@
+{
+    "vocabulary": "core",
+    "condition": [ 
+        { "operation": "has-key", "path": [], "value": "type" },
+        { "operation": "type-is", "path": [ "type" ], "value": "array" },
+        { "operation": "contains-type", "path": [ "type" ], "value": "object" },
+        { "operation": "type-is", "path": [ "type", {} ], "value": "string" }
+    ],
+    "transform": [
+        { "operation": "remove-and-append", "to": [ "anyOf", "-", "type" ], "from": [ "type", {} ] }
+    ]
+}

rules/from-draft3/to-draft4/015-type-has-objects-in-its-array.json

@@ -0,0 +1,12 @@
+{
+    "vocabulary": "core",
+    "condition": [ 
+        { "operation": "has-key", "path": [], "value": "type" },
+        { "operation": "type-is", "path": [ "type" ], "value": "array" },
+        { "operation": "has-key", "path": [], "value": "anyOf" },
+        { "operation": "type-is", "path": [ "type", {} ], "value": "object" } 
+    ],
+    "transform": [
+        { "operation": "remove-and-append", "to": [ "anyOf" ], "from": [ "type", {} ] }
+    ]
+}

rules/from-draft3/to-draft4/016-type-is-an-empty-array.json

@@ -0,0 +1,10 @@
+{
+    "vocabulary": "core",
+    "condition": [ 
+        { "operation": "has-key", "path": [], "value": "type" },
+        { "operation": "size-equals", "path": [ "type" ], "value": 0 }
+    ],
+    "transform": [
+        { "operation": "remove", "to": [ "type" ] }
+    ]
+}

test/from-draft3/to-draft4/type-has-any-in-its-array.json

@@ -0,0 +1,9 @@
+[
+    {
+        "title": "`type` is present and contains `any` in it",
+        "from": {
+            "type": [ {}, "string", "any", { "type": "string" } ]
+        },
+        "to": {}
+    }
+]

test/from-draft3/to-draft4/type-has-value-equals-any.json

@@ -0,0 +1,9 @@
+[
+    {
+        "title": "`type` is present and value equals to any",
+        "from": {
+            "type": "any"
+        },
+        "to": {}
+    }
+]

test/from-draft3/to-draft4/type-is-an-array.json

@@ -0,0 +1,36 @@
+[
+    {
+        "title": "`type` is present is an array of objects",
+        "from": {
+            "type": [ {}, { "type": "string" } ]
+        },
+        "to": {
+            "anyOf": [
+                {},
+                { "type": "string" }
+            ]
+        }
+    },
+    {
+        "title": "`type` is present and contains objects and strings in it",
+        "from": {
+            "type": [ {}, "string", "object", { "type": "string" } ]
+        },
+        "to": {
+            "anyOf": [
+                { "type": [ "object", "string" ] },
+                {},
+                { "type": "string" }
+            ]
+        }
+    },
+    {
+        "title": "`type` is present and is an array of strings",
+        "from": {
+            "type": [ "string", "object" ]
+        },
+        "to": {
+            "type": [ "string", "object" ]
+        }
+    }
+]