diff --git a/lib/src/source.rs b/lib/src/source.rs
index f5bbbde..f549c9c 100644
--- a/lib/src/source.rs
+++ b/lib/src/source.rs
@@ -239,6 +239,99 @@ pub mod reader_sync {
             SourceQuestionsZipReader::new(self)
         }
     }
+    #[cfg(test)]
+    mod test {
+        use crate::source::SourceQuestion;
+
+        use super::*;
+        use std::fs;
+        use std::{io::Write, iter, path::Path};
+        use tempfile::tempdir;
+
+        use super::SourceQuestionsBatch;
+
+        fn sample_batch() -> SourceQuestionsBatch {
+            SourceQuestionsBatch {
+                description: "Тестовый".into(),
+                date: "00-000-2000".into(),
+                questions: vec![
+                    SourceQuestion {
+                        id: "Вопрос 1".into(),
+                        description: "Сколько будет (2 * 2 * 2 + 2) * 2 * 2 + 2".into(),
+                        answer: "42".into(),
+                        ..Default::default()
+                    },
+                    SourceQuestion {
+                        id: "Вопрос 2".into(),
+                        description: "Зимой и летом одним цветом".into(),
+                        answer: "ёлка".into(),
+                        ..Default::default()
+                    },
+                ],
+                ..Default::default()
+            }
+        }
+
+        fn write_sample_zip<P>(path: P)
+        where
+            P: AsRef<Path>,
+        {
+            let batch = sample_batch();
+            let z_file = fs::File::create(path).expect("crerate zip file");
+            let mut zip_file = zip::ZipWriter::new(z_file);
+            let options =
+                zip::write::FileOptions::default().compression_method(zip::CompressionMethod::Zstd);
+            zip_file
+                .start_file("test.json", options)
+                .expect("zip start file");
+            zip_file
+                .write(serde_json::to_vec(&batch).unwrap().as_slice())
+                .expect("write entry");
+            zip_file.finish().expect("finish zip file");
+        }
+
+        #[test]
+        fn test_source_questions_get() {
+            let expected_batch = sample_batch();
+            let dir = tempdir().expect("tempdir");
+
+            // write sample
+            let tmpfile_zip = dir.path().join("test.zip");
+            write_sample_zip(&tmpfile_zip);
+
+            let z_file = fs::File::open(tmpfile_zip).expect("open zip file");
+            let zip_file = zip::ZipArchive::new(z_file).expect("open zip file reader");
+
+            let mut source = zip_file.source_questions();
+            assert_eq!(source.len(), 1);
+
+            let actual = source.nth(0).expect("get batch");
+            assert_eq!(actual.0, "test.json");
+            assert_eq!(actual.1.expect("parse batch"), expected_batch);
+        }
+
+        #[test]
+        fn test_source_questions_iter() {
+            let expected_batch = sample_batch();
+            let dir = tempdir().expect("tempdir");
+
+            // write sample
+            let tmpfile_zip = dir.path().join("test.zip");
+            write_sample_zip(&tmpfile_zip);
+
+            let z_file = fs::File::open(tmpfile_zip).expect("open zip file");
+            let zip_file = zip::ZipArchive::new(z_file).expect("open zip file reader");
+
+            let source = zip_file.source_questions();
+            assert_eq!(source.len(), 1);
+
+            let expected_iter = iter::once((String::from("test.json"), Ok(expected_batch)));
+
+            assert!(source
+                .map(|x| (x.0, x.1.map_err(|e| e.to_string())))
+                .eq(expected_iter));
+        }
+    }
 }
 
 #[cfg(any(feature = "convert", feature = "source"))]