feat(transaction-is-ended): add IsEnded() method (#995)

v3/newrelic/transaction.go

@@ -239,6 +239,16 @@ func (txn *Transaction) SetWebRequestHTTP(r *http.Request) {
 	txn.SetWebRequest(wr)
 }
 
+// IsEnded returns transaction end status.
+// If the transaction is nil, the thread is nil, or the transaction is finished, it returns true.
+// Otherwise, it returns thread.finished value.
+func (txn *Transaction) IsEnded() bool {
+	if txn == nil || txn.thread == nil || txn.thread.txn == nil {
+		return true
+	}
+	return txn.thread.txn.finished
+}
+
 func transport(r *http.Request) TransportType {
 	if strings.HasPrefix(r.Proto, "HTTP") {
 		if r.TLS != nil {

v3/newrelic/transaction_test.go

@@ -6,6 +6,29 @@ import (
 	"testing"
 )
 
+func TestIsEnded(t *testing.T) {
+	tests := []struct {
+		name     string
+		txn      *Transaction
+		expected bool
+	}{
+		{"txn is nil", nil, true},
+		{"thread is nil", &Transaction{thread: nil}, true},
+		{"txn.thread.txn is nil", &Transaction{thread: &thread{}}, true},
+		{"txn.thread.txn.finished is true", &Transaction{thread: &thread{txn: &txn{finished: true}}}, true},
+		{"txn.thread.txn.finished is false", &Transaction{thread: &thread{txn: &txn{finished: false}}}, false},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := tt.txn.IsEnded()
+			if result != tt.expected {
+				t.Errorf("IsEnded() = %v; want %v", result, tt.expected)
+			}
+		})
+	}
+}
+
 func TestTransaction_MethodsWithNilTransaction(t *testing.T) {
 	var nilTxn *Transaction