support docstring syntax for rhs of js object property mutation

Author: ptrthomas

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

@@ -73,6 +73,8 @@ public interface Actions {
 
     void eval(String exp);
 
+    void evalAssignDocString(String lhs, String rhs);
+
     void evalDocString(String exp);
 
     void eval(String name, String dotOrParen, String exp);

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

@@ -365,6 +365,12 @@ public void evalDocString(String exp) {
         engine.evalJs(exp);
     }
 
+    @Override
+    @When("^([\\w]+\\.[^=]+=$)")
+    public void evalAssignDocString(String lhs, String rhs) {
+        engine.evalJs(lhs + rhs);
+    }
+
     @Override
     @When("^([\\w]+)([^\\s^\\w])(.+)")
     public void eval(String name, String dotOrParen, String exp) {

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

@@ -31,15 +31,7 @@
 import com.intuit.karate.StringUtils;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Objects;
-import java.util.StringJoiner;
+import java.util.*;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import org.slf4j.LoggerFactory;
@@ -261,8 +253,18 @@ public static Result execute(Step step, Actions actions) {
             KarateException e = new KarateException("no step-definition method match found for: " + text);
             return Result.failed(System.currentTimeMillis(), 0, e, step);
         } else if (matches.size() > 1) {
-            KarateException e = new KarateException("more than one step-definition method matched: " + text + " - " + matches);
-            return Result.failed(System.currentTimeMillis(), 0, e, step);
+            boolean evalAssign = false; // special case to support foo.bar = (docstring) in cucumber syntax
+            for (MethodMatch m : matches) {
+                if (m.getMethod().getName().equalsIgnoreCase("evalAssignDocString")) {
+                    evalAssign = true;
+                    matches = Collections.singletonList(m);
+                    break;
+                }
+            }
+            if (!evalAssign) {
+                KarateException e = new KarateException("more than one step-definition method matched: " + text + " - " + matches);
+                return Result.failed(System.currentTimeMillis(), 0, e, step);
+            }
         }
         MethodMatch match = matches.get(0);
         Object last;

karate-core/src/test/java/com/intuit/karate/core/FeatureRuntimeTest.java

@@ -178,6 +178,11 @@ void testEvalAndSet() {
         run("eval-and-set.feature");
     }
 
+    @Test
+    void testEvalAssign() {
+        run("eval-assign.feature");
+    }
+
     @Test
     void testExtract() {
         run("extract.feature");

karate-core/src/test/java/com/intuit/karate/core/eval-assign.feature

@@ -0,0 +1,12 @@
+Feature:
+
+  Scenario:
+    * def foo = { bar: 'one' }
+    * foo.bar =
+    """
+    {
+      some: 'big',
+      message: 'content'
+    }
+    """
+    * match foo == { bar: { some: 'big', message: 'content' } }