Implement ostree::checksum_file_from_input

rust-bindings/rust/tests/functions/mod.rs

@@ -1,6 +1,6 @@
 use gio::NONE_CANCELLABLE;
 use glib::Cast;
-use ostree::{checksum_file, ObjectType, RepoFile, RepoFileExt};
+use ostree::{checksum_file, checksum_file_from_input, ObjectType, RepoFile, RepoFileExt};
 use util::TestRepo;
 
 #[test]
@@ -19,3 +19,32 @@ fn should_checksum_file() {
 
     assert_eq!(file.get_checksum().unwrap(), result.to_string());
 }
+
+#[test]
+fn should_checksum_file_from_input() {
+    let repo = TestRepo::new();
+    let commit_checksum = repo.test_commit("test");
+
+    let objects = repo
+        .repo
+        .traverse_commit(&commit_checksum, -1, NONE_CANCELLABLE)
+        .expect("traverse commit");
+    for obj in objects {
+        if obj.object_type() != ObjectType::File {
+            continue;
+        }
+        let (stream, file_info, xattrs) = repo
+            .repo
+            .load_file(obj.checksum(), NONE_CANCELLABLE)
+            .expect("load file");
+        let result = checksum_file_from_input(
+            file_info.as_ref().unwrap(),
+            xattrs.as_ref(),
+            stream.as_ref(),
+            ObjectType::File,
+            NONE_CANCELLABLE,
+        )
+        .expect("checksum file from input");
+        assert_eq!(obj.checksum(), result.to_string());
+    }
+}