Merge pull request #47 from serjk/exist-add-ut

[Add] test on checking exist with sub keys

exists_test.go

@@ -1,6 +1,8 @@
 package mxj
 
-import "testing"
+import (
+	"testing"
+)
 
 func TestExists(t *testing.T) {
 	m := map[string]interface{}{
@@ -18,3 +20,18 @@ func TestExists(t *testing.T) {
 		t.Fatal("Have found a non existing element")
 	}
 }
+
+func TestExistsWithSubKeys(t *testing.T) {
+	mv, err := NewMapXml(doc2)
+	if err != nil {
+		t.Fatal("err:", err.Error())
+	}
+
+	if !mv.Exists("doc.books.book", "-seq:1") {
+		t.Fatal("Haven't found an existing element")
+	}
+
+	if mv.Exists("doc.books.book", "-seq:2") {
+		t.Fatal("Have found a non existing element")
+	}
+}