Fixed equals operator for top level node

pkg/yqlib/operator_assign.go

@@ -32,11 +32,7 @@ func assignUpdateOperator(d *dataTreeNavigator, matchingNodes *list.List, pathNo
 			candidate.UpdateFrom(rhsCandidate)
 		}
 	}
-	// // if there was nothing given, perhaps we are creating a new yaml doc
+
-	// if matchingNodes.Len() == 0 {
-	// 	log.Debug("started with nothing, returning LHS, %v", lhs.Len())
-	// 	return lhs, nil
-	// }
 	return matchingNodes, nil
 }
 

pkg/yqlib/operator_equals.go

@@ -12,10 +12,13 @@ func equalsOperator(d *dataTreeNavigator, matchingNodes *list.List, pathNode *Pa
 func isEquals(d *dataTreeNavigator, lhs *CandidateNode, rhs *CandidateNode) (*CandidateNode, error) {
 	value := false
 
-	if lhs.Node.Tag == "!!null" {
+	lhsNode := UnwrapDoc(lhs.Node)
-		value = (rhs.Node.Tag == "!!null")
+	rhsNode := UnwrapDoc(rhs.Node)
+
+	if lhsNode.Tag == "!!null" {
+		value = (rhsNode.Tag == "!!null")
 	} else {
-		value = matchKey(lhs.Node.Value, rhs.Node.Value)
+		value = matchKey(lhsNode.Value, rhsNode.Value)
 	}
 	log.Debugf("%v == %v ? %v", NodeToString(lhs), NodeToString(rhs), value)
 	return createBooleanCandidate(lhs, value), nil

pkg/yqlib/operator_equals_test.go

@@ -5,6 +5,15 @@ import (
 )
 
 var equalsOperatorScenarios = []expressionScenario{
+	{
+		skipDoc:    true,
+		document:   "cat",
+		document2:  "dog",
+		expression: "select(fi==0) == select(fi==1)",
+		expected: []string{
+			"D0, P[], (!!bool)::false\n",
+		},
+	},
 	{
 		description: "Match string",
 		document:    `[cat,goat,dog]`,