3 files changed, 64 insertions, 3 deletions
diff --git a/src/config.rs b/src/config.rs
index f19e59a..2ce73f1 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -10,7 +10,7 @@ use ser::ConfigSerializer;
 use source::Source;
 
 use path;
-use value::{Value, ValueKind, ValueWithKey};
+use value::{Table, Value, ValueKind, ValueWithKey};
 
 #[derive(Clone, Debug)]
 enum ConfigKind {
@@ -49,7 +49,12 @@ pub struct Config {
 
 impl Config {
     pub fn new() -> Self {
-        Config::default()
+        Self {
+            kind: ConfigKind::default(),
+            // Config root should be instantiated as an empty table
+            // to avoid deserialization errors.
+            cache: Value::new(None, Table::new()),
+        }
     }
 
     /// Merge in a configuration property source.
@@ -192,7 +197,7 @@ impl Config {
         T::deserialize(self)
     }
 
-    /// Attempt to deserialize the entire configuration into the requested type.
+    /// Attempt to serialize the entire configuration from the given type.
     pub fn try_from<T: Serialize>(from: &T) -> Result<Self> {
         let mut serializer = ConfigSerializer::default();
         from.serialize(&mut serializer)?;
diff --git a/tests/defaults.rs b/tests/defaults.rs
new file mode 100644
index 0000000..8d863ae
--- /dev/null
+++ b/tests/defaults.rs
@@ -0,0 +1,35 @@
+extern crate config;
+
+#[macro_use]
+extern crate serde_derive;
+
+use config::*;
+
+#[derive(Debug, Serialize, Deserialize)]
+#[serde(default)]
+pub struct Settings {
+    pub db_host: String,
+}
+
+impl Default for Settings {
+    fn default() -> Self {
+        Settings {
+            db_host: String::from("default"),
+        }
+    }
+}
+
+#[test]
+fn set_defaults() {
+    let c = Config::new();
+    let s: Settings = c.try_into().expect("Deserialization failed");
+
+    assert_eq!(s.db_host, "default");
+}
+
+#[test]
+fn try_from_defaults() {
+    let c = Config::try_from(&Settings::default()).expect("Serialization failed");
+    let s: Settings = c.try_into().expect("Deserialization failed");
+    assert_eq!(s.db_host, "default");
+}
diff --git a/tests/empty.rs b/tests/empty.rs
new file mode 100644
index 0000000..1f56d38
--- /dev/null
+++ b/tests/empty.rs
@@ -0,0 +1,21 @@
+extern crate config;
+
+#[macro_use]
+extern crate serde_derive;
+
+use config::*;
+
+#[derive(Debug, Serialize, Deserialize)]
+struct Settings {
+    #[serde(skip)]
+    foo: isize,
+    #[serde(skip)]
+    bar: u8,
+}
+
+#[test]
+fn empty_deserializes() {
+    let s: Settings = Config::new().try_into().expect("Deserialization failed");
+    assert_eq!(s.foo, 0);
+    assert_eq!(s.bar, 0);
+}