resolve callonce issue #1665 #1558

Author: ptrthomas

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

@@ -2008,7 +2008,15 @@ private Variable callOnceResult(ScenarioCall.Result result, boolean sharedScope)
             vars.clear(); // clean slate
             // deep-clone so that subsequent steps don't modify data / references being passed around
             if (result.vars != null) {
-                result.vars.forEach((k, v) -> vars.put(k, v.copy(true)));
+                Set<Object> seen = Collections.newSetFromMap(new IdentityHashMap());
+                result.vars.forEach((k, v) -> {
+                    Object o = recurseAndAttachAndDeepClone(k, v.getValue(), seen);
+                    try {
+                        vars.put(k, new Variable(o));
+                    } catch (Exception e) {
+                        logger.warn("[*** callonce result ***] ignoring non-json value: '{}' - {}", k, e.getMessage());
+                    }
+                });
             }
             init(); // this will attach and also insert magic variables
             // re-apply config from time of snapshot

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

@@ -4,4 +4,5 @@ Scenario:
 * print 'before configure headers'
 * configure headers = read('headers.js')
 * def message = 'from common'
-* def HelloOnce = Java.type('com.intuit.karate.core.parallel.Hello');
+* def HelloOnce = Java.type('com.intuit.karate.core.parallel.Hello')
+* def sayHelloOnce = function(name){ return 'hello ' + name }

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

@@ -9,6 +9,7 @@ Background:
 * match message2 == 'fromCallSingleFromConfig2'
 
 Scenario: one
+* call sayHelloOnce 'one'
 * path 'one'
 * method get
 * status 200
@@ -19,8 +20,10 @@ Scenario: one
 * match HelloConfigSingle.sayHello('world') == 'hello world'
 * match HelloOnce.sayHello('world') == 'hello world'
 * match sayHello('world') == 'hello world'
+* match sayHelloOnce('world') == 'hello world'
 
 Scenario: two
+* call sayHelloOnce 'two'
 * path 'two'
 * method get
 * status 200
@@ -31,8 +34,10 @@ Scenario: two
 * match HelloConfigSingle.sayHello('world') == 'hello world'
 * match HelloOnce.sayHello('world') == 'hello world'
 * match sayHello('world') == 'hello world'
+* match sayHelloOnce('world') == 'hello world'
 
 Scenario: three
+* call sayHelloOnce 'three'
 * path 'three'
 * method get
 * status 200
@@ -42,4 +47,5 @@ Scenario: three
 
 * match HelloConfigSingle.sayHello('world') == 'hello world'
 * match HelloOnce.sayHello('world') == 'hello world'
-* match sayHello('world') == 'hello world'
+* match sayHello('world') == 'hello world'
+* match sayHelloOnce('world') == 'hello world'