1394: restore original proxy spec after tests

test/rebar_utils_SUITE.erl

@@ -278,19 +278,34 @@ tup_merge(_Config) ->
 proxy_auth(_Config) ->
 	Host = "host:",
 	Port = "1234",
+	
+	proxy_auth(_Config, "http_proxy"),
+	proxy_auth(_Config, "https_proxy").
+
+proxy_auth(_Config, ProxyEnvKey) ->
+	%% remember current proxy specification
+	OldProxySpec = os:getenv(ProxyEnvKey),
 
-	application:unset_env(rebar, proxy_auth),
 	%% proxy auth not set
+	application:unset_env(rebar, proxy_auth),
 	?assertEqual([], rebar_utils:get_proxy_auth()),
+
 	%% proxy auth with regular username/password
-	os:putenv("http_proxy", "http://Username:Password@" ++ Host ++ Port),
+	os:putenv(ProxyEnvKey, "http://Username:Password@" ++ Host ++ Port),
 	rebar_utils:set_httpc_options(),
 	?assertEqual([{proxy_auth, {"Username", "Password"}}],
 				 rebar_utils:get_proxy_auth()),
+
 	%% proxy auth with username missing and url encoded password
-	os:putenv("http_proxy", "http://:%3F!abc%23%24@" ++ Host ++ Port),
+	os:putenv(ProxyEnvKey, "http://:%3F!abc%23%24@" ++ Host ++ Port),
 	rebar_utils:set_httpc_options(),
 	?assertEqual([{proxy_auth, {"", "?!abc#$"}}],
-				 rebar_utils:get_proxy_auth()).
-	
-	
+				 rebar_utils:get_proxy_auth()),
+
+	%% restore original proxy specification if any
+	restore_proxy_env(OldProxySpec).
+
+restore_proxy_env(false) ->
+	ok;
+restore_proxy_env(ProxySpec) ->
+	os:putenv("http_proxy", ProxySpec).