Add test cases for string liters | string, which should be string.

Author: domoritz

test/programs/string-literals-inline/main.ts

@@ -1,3 +1,4 @@
 class MyObject {
     foo: "ok" | "fail" | "abort";
+    bar: "ok" | "fail" | "abort" | string;
 }

test/programs/string-literals-inline/schema.json

@@ -8,10 +8,14 @@
                 "fail",
                 "ok"
             ]
+        },
+        "bar": {
+            "type": "string"
         }
     },
     "required": [
-        "foo"
+        "foo",
+        "bar"
     ],
     "$schema": "http://json-schema.org/draft-04/schema#"
 }

test/programs/string-literals/main.ts

@@ -2,4 +2,5 @@ type result = "ok" | "fail" | "abort";
 
 class MyObject {
     foo: result;
+    bar: result | string;
 }

test/programs/string-literals/schema.json

@@ -3,10 +3,14 @@
     "properties": {
         "foo": {
             "$ref": "#/definitions/result"
+        },
+        "bar": {
+            "type": "string"
         }
     },
     "required": [
-        "foo"
+        "foo",
+        "bar"
     ],
     "definitions": {
         "result": {