Added GraphQL to the database.

src/lib.rs

@@ -1,13 +1,30 @@
+use async_graphql::{EmptyMutation, EmptySubscription, Object, Schema};
+use serde_json;
+
+struct Query;
+
+#[Object]
+impl Query {
+    async fn pointless(&self) -> String {
+        "this is pointless.".to_string()
+    }
+}
+
 #[derive(Clone)]
-pub struct Database {}
+pub struct Database {
+    schema: Schema<Query, EmptyMutation, EmptySubscription>,
+}
 
 impl Database {
     pub fn new() -> Self {
-        Self {}
+        Self {
+            schema: Schema::new(Query, EmptyMutation, EmptySubscription),
+        }
     }
 
-    pub async fn query(&self, _qry: &str) -> String {
-        "{data{}}".to_string()
+    pub async fn execute(&self, qry: &str) -> String {
+        let res = self.schema.execute(qry).await;
+        serde_json::to_string(&res).unwrap()
     }
 }
 
@@ -16,15 +33,15 @@ mod queries {
     use super::*;
 
     #[async_std::test]
-    async fn empty_table_query() {
-        let expected = "{data{}}";
-        let testdb = Database::new();
-        let output = testdb.query("{tables{name}}").await;
+    async fn working() {
+        let db = Database::new();
+        let output = db.execute("{pointless}").await;
+        let expected = r#"{"data":{"pointless":"this is pointless."}}"#;
         assert!(
             output == expected,
-            "Got '{}' expected '{}'.",
+            "Got '{}' instead of '{}'.",
             output,
             expected
-        );
+        )
     }
 }