tests: add a test for fragment handling

Inline fragments are not yet supported, so comment out its test.

Fixes #107.

Author: mathstuf

tests/fragments.rs

@@ -0,0 +1,30 @@
+#[macro_use]
+extern crate graphql_client;
+extern crate serde;
+#[macro_use]
+extern crate serde_derive;
+#[macro_use]
+extern crate serde_json;
+
+#[derive(GraphQLQuery)]
+#[graphql(
+    query_path = "tests/fragments/query.graphql",
+    schema_path = "tests/fragments/schema.graphql"
+)]
+#[allow(dead_code)]
+struct FragmentReference;
+
+#[test]
+fn fragment_reference() {
+    let valid_response = json!({
+        "inFragment": "value",
+    });
+
+    let valid_fragment_reference =
+        serde_json::from_value::<fragment_reference::ResponseData>(valid_response).unwrap();
+
+    assert_eq!(
+        valid_fragment_reference.fragment_reference.in_fragment.unwrap(),
+        "value"
+    );
+}

tests/fragments/query.graphql

@@ -0,0 +1,7 @@
+fragment FragmentReference on QueryRoot {
+  inFragment
+}
+
+query FragmentReference {
+  ...FragmentReference
+}

tests/fragments/schema.graphql

@@ -0,0 +1,8 @@
+schema {
+  query: QueryRoot
+}
+
+type QueryRoot {
+  extra: String
+  inFragment: String
+}