Adding delete_all_documents method for IndexWriter (#133)

src/index.rs

@@ -117,6 +117,12 @@ impl IndexWriter {
  Ok(())
  }
 
+ /// Deletes all documents from the index.
+ fn delete_all_documents(&mut self) -> PyResult<()> {
+ self.inner()?.delete_all_documents().map_err(to_pyerr)?;
+ Ok(())
+ }
+
  /// The opstamp of the last successful commit.
  ///
  /// This is the opstamp the index will rollback to if there is a failure

tests/tantivy_test.py

@@ -488,6 +488,18 @@ def test_search_result_pickle(self, ram_index):
 
  assert orig == pickled
 
+ def test_delete_all_documents(self, ram_index):
+ index = ram_index
+ writer = index.writer()
+ writer.delete_all_documents()
+ writer.commit()
+
+ index.reload()
+ query = index.parse_query("sea whale", ["title", "body"])
+ result = index.searcher().search(query, 10)
+
+ assert len(result.hits) == 0
+
 
 class TestUpdateClass(object):
  def test_delete_update(self, ram_index):