From f9357a02c346fe2d3a2d424d19b884e3799f13f7 Mon Sep 17 00:00:00 2001
From: Mitranim <me@mitranim.com>
Date: Fri, 19 Jun 2015 23:10:50 +0300
Subject: [PATCH] added Reference.Child

---
 firebase.go      | 20 ++++++++++++++++++++
 firebase_test.go | 20 ++++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/firebase.go b/firebase.go
index c926f2d..678a8fc 100644
--- a/firebase.go
+++ b/firebase.go
@@ -200,3 +200,23 @@ func (r *Reference) Delete() error {
 
 	return nil
 }
+
+func (r *Reference) Child(path string) *Reference {
+	url := r.url
+
+	// Append path.
+	if url[len(url)-1] == '/' {
+		url = url[:len(url)-1]
+	}
+	if path[0] == '/' {
+		url += path
+	} else {
+		url += "/" + path
+	}
+
+	// Transfer token.
+	ref := NewReference(url)
+	ref.token = r.token
+
+	return ref
+}
diff --git a/firebase_test.go b/firebase_test.go
index a0ec8ff..f434182 100644
--- a/firebase_test.go
+++ b/firebase_test.go
@@ -239,3 +239,23 @@ func TestThatExportWorks(t *testing.T) {
 	r = NewReference(url).Export(true).Export(false)
 	_ = r
 }
+
+func TestThatChildWorks(t *testing.T) {
+	url := "https://SampleChat.firebaseIO-demo.com/users/fred"
+
+	parent := NewReference(url).Auth("secret-token")
+
+	child := parent.Child("name")
+	if child.url != url+"/name" {
+		t.Error("Expected child URL to equal", url+"/name", ", got", child.url)
+	}
+
+	child = parent.Child("/name")
+	if child.url != url+"/name" {
+		t.Error("Expected child URL to equal", url+"/name", ", got", child.url)
+	}
+
+	if child.token != parent.token {
+		t.Error("Expected child to receive parent's auth token.")
+	}
+}