Allow apostrophe in uri-template literal (#1275)

The uri-template format regex listed ' in its excluded character set, so
"a'b" was reported invalid. An apostrophe in a literal is valid; remove it
from the exclusion set.

Author: dngr2

src/main/java/com/networknt/schema/format/Formats.java

@@ -44,7 +44,7 @@ static PatternFormat pattern(String name, String regex) {
         formats.add(new IPv6Format());
         formats.add(pattern("json-pointer", "^(/([^/#~]|[~](?=[01]))*)*$", "format.json-pointer"));
         formats.add(pattern("relative-json-pointer", "^(0|([1-9]\\d*))(#|(/([^/#~]|[~](?=[01]))*)*)$", "format.relative-json-pointer"));
-        formats.add(pattern("uri-template", "^([^\\p{Cntrl}\"'%<>\\^`\\{|\\}]|%\\p{XDigit}{2}|\\{[+#./;?&=,!@|]?((\\w|%\\p{XDigit}{2})(\\.?(\\w|%\\p{XDigit}{2}))*(:[1-9]\\d{0,3}|\\*)?)(,((\\w|%\\p{XDigit}{2})(\\.?(\\w|%\\p{XDigit}{2}))*(:[1-9]\\d{0,3}|\\*)?))*\\})*$", "format.uri-template"));
+        formats.add(pattern("uri-template", "^([^\\p{Cntrl}\"%<>\\^`\\{|\\}]|%\\p{XDigit}{2}|\\{[+#./;?&=,!@|]?((\\w|%\\p{XDigit}{2})(\\.?(\\w|%\\p{XDigit}{2}))*(:[1-9]\\d{0,3}|\\*)?)(,((\\w|%\\p{XDigit}{2})(\\.?(\\w|%\\p{XDigit}{2}))*(:[1-9]\\d{0,3}|\\*)?))*\\})*$", "format.uri-template"));
         formats.add(pattern("uuid", "^\\p{XDigit}{8}-\\p{XDigit}{4}-\\p{XDigit}{4}-\\p{XDigit}{4}-\\p{XDigit}{12}$", "format.uuid"));
         formats.add(new DateFormat());
         formats.add(new DateTimeFormat());

src/test/java/com/networknt/schema/FormatValidatorTest.java

@@ -220,4 +220,16 @@ void draft7DisableFormat() {
         });
         assertEquals(0, messages.size());
     }
+
+    @Test
+    void uriTemplateAllowsApostropheInLiteral() {
+        String schemaData = "{\"$schema\":\"https://json-schema.org/draft/2020-12/schema\",\"format\":\"uri-template\"}";
+        Schema schema = SchemaRegistry.withDefaultDialect(SpecificationVersion.DRAFT_2020_12).getSchema(schemaData);
+        // An apostrophe in a literal is valid.
+        assertTrue(schema.validate("\"a'b\"", InputFormat.JSON,
+                ec -> ec.executionConfig(c -> c.formatAssertionsEnabled(true))).isEmpty());
+        // Expression syntax still validates.
+        assertTrue(schema.validate("\"http://x/{y}\"", InputFormat.JSON,
+                ec -> ec.executionConfig(c -> c.formatAssertionsEnabled(true))).isEmpty());
+    }
 }