Tweaked doc and readme

Author: bbakerman

readme.md

@@ -48,19 +48,7 @@ the `name` field must be at least 3 characters long and no more than 100 charact
 
 ## The supplied constraints
 
-### @Arguments
-
-The provided expression must evaluate to true.
-
-- Example : `drivers( first : Int, after : String!, last : Int, before : String) 
- : DriverConnection @Arguments(expression : "${args.containsOneOf('first','last') }"`
-
-- Applies to : `Output Fields`
-
-- SDL : `directive @Arguments(expression : String!, message : String = "graphql.validation.Arguments.message") on FIELD_DEFINITION`
-
-- Message : `graphql.validation.Arguments.message`
-
+<!-- generated by DocHelper on 2019-08-17T11:14:09.722Z -->
 
 ### @AssertFalse
 
@@ -127,6 +115,20 @@ The element must be a number inside the specified `integer` and `fraction` range
 - Message : `graphql.validation.Digits.message`
 
 
+### @Expression
+
+The provided expression must evaluate to true.
+
+- Example : `drivers( first : Int, after : String!, last : Int, before : String) 
+ : DriverConnection @Expression(value : "${args.containsOneOf('first','last') }"`
+
+- Applies to : `All Types and Scalars`
+
+- SDL : `directive @Expression(value : String!, message : String = "graphql.validation.Expression.message") on FIELD_DEFINITION | ARGUMENT_DEFINITION | INPUT_FIELD_DEFINITION`
+
+- Message : `graphql.validation.Expression.message`
+
+
 ### @Max
 
 The element must be a number whose value must be less than or equal to the specified maximum.
@@ -268,3 +270,5 @@ The element size must be between the specified `min` and `max` boundaries (inclu
 - SDL : `directive @Size(min : Int = 0, max : Int = 2147483647, message : String = "graphql.validation.Size.message") on ARGUMENT_DEFINITION | INPUT_FIELD_DEFINITION`
 
 - Message : `graphql.validation.Size.message`
+
+<!-- --- -->

src/test/groovy/graphql/validation/DocHelper.groovy

@@ -3,6 +3,8 @@ package graphql.validation
 import graphql.validation.constraints.DirectiveConstraint
 import graphql.validation.constraints.DirectiveConstraints
 
+import java.time.Instant
+
 
 /**
  * Useful for printing out the readme.md
@@ -11,7 +13,11 @@ class DocHelper {
 
     static void main(String[] args) {
         ArrayList<DirectiveConstraint> standardRules = sorted()
+
+        PrintStream out = System.out
+        out.printf("""\n\n<!-- generated by DocHelper on ${Instant.now()} -->\n""")
         standardRules.forEach({ it -> printConstraint(it) })
+        out.printf("""<!-- --- -->\n""")
 
     }
 

src/test/groovy/graphql/validation/el/ELSupportTest.groovy

@@ -1,5 +1,6 @@
 package graphql.validation.el
 
+
 import spock.lang.Specification
 import spock.lang.Unroll
 
@@ -47,6 +48,7 @@ class ELSupportTest extends Specification {
 
     }
 
+    @Unroll
     def "basic expression support"() {
         def el = new ELSupport(Locale.getDefault())