Take on rusqlite dependency. Fixes #148. r=rnewman

Cargo.toml

@@ -4,6 +4,8 @@ version = "0.4.0"
 authors = ["Richard Newman <rnewman@twinql.com>", "Nicholas Alexander <nalexander@mozilla.com>"]
 
 [dependencies]
+rusqlite = "0.8.0"
+
 [dependencies.datomish-query-parser]
   path = "query-parser"
 

src/lib.rs

@@ -9,6 +9,9 @@
 // specific language governing permissions and limitations under the License.
 
 extern crate datomish_query_parser;
+extern crate rusqlite;
+
+use rusqlite::Connection;
 
 pub fn get_name() -> String {
   return String::from("datomish");
@@ -19,19 +22,15 @@ pub fn get_parser_name() -> String {
   return datomish_query_parser::get_name();
 }
 
-pub fn add_two(a: i32) -> i32 {
-    a + 2
+// Will ultimately not return the sqlite connection directly
+pub fn get_connection() -> Connection {
+    return Connection::open_in_memory().unwrap();
 }
 
 #[cfg(test)]
 mod tests {
     use super::*;
 
-    #[test]
-    fn it_works() {
-        assert_eq!(4, add_two(2));
-    }
-
     #[test]
     fn can_import_parser() {
         assert_eq!(String::from("datomish-query-parser"), get_parser_name());

tests/external_test.rs

@@ -11,6 +11,44 @@
 extern crate datomish;
 
 #[test]
-fn external_test() {
-    assert_eq!(4, datomish::add_two(2));
+fn can_import_sqlite() {
+    // From https://github.com/jgallagher/rusqlite#rusqlite.
+    #[derive(Debug)]
+    struct Person {
+        id: i32,
+        name: String,
+        data: Option<Vec<u8>>
+    }
+
+    let conn = datomish::get_connection();
+
+    conn.execute("CREATE TABLE person (
+                  id              INTEGER PRIMARY KEY,
+                  name            TEXT NOT NULL,
+                  data            BLOB
+                  )", &[]).unwrap();
+    let me = Person {
+        id: 1,
+        name: "Steven".to_string(),
+        data: None
+    };
+    conn.execute("INSERT INTO person (name, data)
+                  VALUES (?1, ?2)",
+                 &[&me.name, &me.data]).unwrap();
+
+    let mut stmt = conn.prepare("SELECT id, name, data FROM person").unwrap();
+    let person_iter = stmt.query_map(&[], |row| {
+        Person {
+            id: row.get(0),
+            name: row.get(1),
+            data: row.get(2)
+        }
+    }).unwrap();
+
+    for person in person_iter {
+        let p = person.unwrap();
+        assert_eq!(me.id, p.id);
+        assert_eq!(me.data, p.data);
+        assert_eq!(me.data, p.data);
+    }
 }