attempt to make even java method refs work in callSingle #1558 #1633

Author: ptrthomas

karate-core/src/main/java/com/intuit/karate/core/ScenarioEngine.java

@@ -1175,8 +1175,7 @@ private Object recurseAndAttachAndDeepClone(String name, Object o, Set<Object> s
         }
         if (o instanceof Class) {
             Class clazz = (Class) o;
-            Value value = JS.evalForValue("Java.type('" + clazz.getCanonicalName() + "')");
-            return value;
+            return JS.evalForValue("Java.type('" + clazz.getCanonicalName() + "')");
         } else if (o instanceof JsFunction) {
             JsFunction jf = (JsFunction) o;
             try {
@@ -1233,7 +1232,7 @@ private Object recurseAndDetachAndDeepClone(String name, Object o, Set<Object> s
                 }
             } catch (Exception e) {
                 logger.warn("[*** detach deep ***] ignoring non-json value in callonce / callSingle: '{}' - {}", name, e.getMessage());
-                return null;
+                return value; // re-attempt on attach
             }
         }
         if (o instanceof List) {

karate-core/src/main/java/com/intuit/karate/graal/JsExecutable.java

@@ -42,9 +42,22 @@ public JsExecutable(Value value) {
         this.value = value;
     }
 
+    private static final Object LOCK = new Object();
+
     @Override
     public Object execute(Value... arguments) {
-        return value.execute(arguments);
+        Object[] args = new Object[arguments.length];
+        for (int i = 0; i < args.length; i++) {
+            args[i] = arguments[i].as(Object.class);
+        }
+        try {
+            return value.execute(args);
+        } catch (Exception e) {
+            logger.warn("[*** execute ***] java method reference (from callSingle() ?) invocation failed: {}", e.getMessage());
+            synchronized (LOCK) {
+                return value.execute(args);
+            }
+        }
     }
 
 }

karate-core/src/test/java/com/intuit/karate/core/parallel/parallel-outline-1.feature

@@ -6,7 +6,7 @@ Background:
  * url serverUrl
  * def data = [ { name: 'value1' }, { name: 'value2' }, { name: 'value3' }, { name: 'value4' } ]
  # java object that comes from a callSingle in the config
- * def helloClass = HelloConfigSingle
+ * def HelloBg = HelloConfigSingle
  * callonce read('call-once-from-feature.feature')
 
 Scenario Outline:
@@ -16,9 +16,10 @@ Scenario Outline:
  * method get
  * status 200
  * match response == { message: 'from feature' }
- # use java object from background, callSingle, config
-  * match helloClass.sayHello('from the other side') == 'hello from the other side'
-  * match helloClass.sayHello(name) == 'hello ' + name
+
+ * match HelloBg.sayHello('world') == 'hello world'
+ * match HelloOnce.sayHello('world') == 'hello world'
+ * match sayHello('world') == 'hello world'
 
  Examples:
   | data |

karate-core/src/test/java/com/intuit/karate/core/parallel/parallel.feature

@@ -18,7 +18,7 @@ Scenario: one
 
 * match HelloConfigSingle.sayHello('world') == 'hello world'
 * match HelloOnce.sayHello('world') == 'hello world'
-# * match sayHello('world') == 'hello world'
+* match sayHello('world') == 'hello world'
 
 Scenario: two
 * path 'two'
@@ -30,7 +30,7 @@ Scenario: two
 
 * match HelloConfigSingle.sayHello('world') == 'hello world'
 * match HelloOnce.sayHello('world') == 'hello world'
-# * match sayHello('world') == 'hello world'
+* match sayHello('world') == 'hello world'
 
 Scenario: three
 * path 'three'
@@ -42,4 +42,4 @@ Scenario: three
 
 * match HelloConfigSingle.sayHello('world') == 'hello world'
 * match HelloOnce.sayHello('world') == 'hello world'
-# * match sayHello('world') == 'hello world'
+* match sayHello('world') == 'hello world'