From e8036e1a2445b59499088b9167d8c1e6176de894 Mon Sep 17 00:00:00 2001
From: Joe Buck <joe@ivysoftworks.com>
Date: Thu, 18 Feb 2016 21:27:02 -0800
Subject: [PATCH] Add test for parsing nested keys from environment variables

Add a test where an environment variable with a nested key
is set and then retrieved. The nested key uses an underscore
in place of a dot to indicate the key hierarchy.
---
 viper_test.go | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/viper_test.go b/viper_test.go
index dde1fe0..44c4b4c 100644
--- a/viper_test.go
+++ b/viper_test.go
@@ -371,6 +371,30 @@ func TestEnv(t *testing.T) {
 
 }
 
+func TestEnvNestedKeys(t *testing.T) {
+	initJSON()
+
+	BindEnv("id")
+	BindEnv("f", "FOOD")
+
+	// Validate the default value
+	assert.Equal(t, "fancy", Get("icing.type"))
+
+	os.Setenv("ID", "13")
+	os.Setenv("FOOD", "apple")
+	os.Setenv("NAME", "crunk")
+	os.Setenv("ICING_TYPE", "plain")
+
+	assert.Equal(t, "13", Get("id"))
+	assert.Equal(t, "apple", Get("f"))
+	assert.Equal(t, "Cake", Get("name"))
+
+	AutomaticEnv()
+
+	assert.Equal(t, "plain", Get("icing.type"))
+	assert.Equal(t, "crunk", Get("name"))
+}
+
 func TestEnvPrefix(t *testing.T) {
 	initJSON()