tsmon: read hostname and region from config file

common/tsmon/config_test.go

Index: common/tsmon/config_test.go
diff --git a/common/tsmon/config_test.go b/common/tsmon/config_test.go
index 939d57eba4460ecb9c1f8ac3b4b0152c994f6695..841f40fb940c2aa5bb4d6d259a0e5f71a04aaa27 100644
--- a/common/tsmon/config_test.go
+++ b/common/tsmon/config_test.go
@@ -32,6 +32,8 @@ func TestLoadConfig(t *testing.T) {
 		So(c.Endpoint, ShouldEqual, "")
 		So(c.Credentials, ShouldEqual, "")
 		So(c.AutoGenHostname, ShouldEqual, false)
+		So(c.Hostname, ShouldEqual, "")
+		So(c.Region, ShouldEqual, "")
 		So(err, ShouldNotBeNil)
 	})
 
@@ -43,13 +45,22 @@ func TestLoadConfig(t *testing.T) {
 		defer tf.Close()
 		defer os.Remove(tf.Name())
 
-		tf.WriteString(`{"endpoint": "foo", "credentials": "bar", "autogen_hostname": true}`)
+		tf.WriteString(`
+        {"endpoint": "foo",

[dsansome, 2016/08/09 03:28:22]

Run gofmt

[Sergey Berezin, 2016/08/10 01:49:16]

Actually, this is part of the `string`, so gofmt doesn't care.
But, good point, I'll format it nicer.

+         "credentials": "bar",
+         "autogen_hostname": true,
+         "hostname": "test_host",
+         "region": "test_region"
+        }
+    `)
 		tf.Sync()
 
 		c, err := loadConfig(tf.Name())
 		So(c.Endpoint, ShouldEqual, "foo")
 		So(c.Credentials, ShouldEqual, "bar")
 		So(c.AutoGenHostname, ShouldEqual, true)
+		So(c.Hostname, ShouldEqual, "test_host")
+		So(c.Region, ShouldEqual, "test_region")
 		So(err, ShouldBeNil)
 	})
 }