diff --git a/__test__/Polyline/__snapshots__/polyline_ext.test.ts.snap b/__test__/Polyline/__snapshots__/polyline_ext.test.ts.snap
new file mode 100644
index 000000000..197c862c4
--- /dev/null
+++ b/__test__/Polyline/__snapshots__/polyline_ext.test.ts.snap
@@ -0,0 +1,3 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`多段线圆弧前向延伸错误 1`] = `"1966.69140"`;
diff --git a/__test__/Polyline/polyline_ext.test.ts b/__test__/Polyline/polyline_ext.test.ts
index edaadb030..8816cf384 100644
--- a/__test__/Polyline/polyline_ext.test.ts
+++ b/__test__/Polyline/polyline_ext.test.ts
@@ -1,6 +1,7 @@
 import { Polyline } from "../../src/DatabaseServices/Entity/Polyline";
 import { LoadCurvesFromFileData } from "../Utils/LoadEntity.util";
 import "../Utils/jest.util";
+
 test('多段线圆弧前向延伸错误', () =>
 {
     let d =