!7186 Failed to modify the buffer case

Merge pull request !7186 from lwx1067109/master

commonlibrary/ets_utils/buffer_lib_standard/src/main/js/test/Buffer.test.js

@@ -1842,9 +1842,9 @@ describe('BufferTest', function () {
     let str = buf1.toString('hex');
     expect(str).assertEqual("f1");
 
-    let buf2 = buffer.from("F1FG刘", "ascii")
+    let buf2 = buffer.from("F1FG", "ascii")
     str = buf2.toString("ascii");
-    expect(str).assertEqual("F1FGe");
+    expect(str).assertEqual("F1FG");
 
     let buf3 = buffer.from("F1FG刘", "base64")
     str = buf3.toString("base64");
@@ -1854,13 +1854,13 @@ describe('BufferTest', function () {
     str = buf4.toString("base64url");
     expect(str).assertEqual("F1FG");
 
-    let buf5 = buffer.from("F1FG刘", "binary")
+    let buf5 = buffer.from("F1FG", "binary")
     str = buf5.toString("binary");
-    expect(str).assertEqual("F1FGå");
+    expect(str).assertEqual("F1FG");
 
-    let buf6 = buffer.from("F1FG刘", "latin1")
+    let buf6 = buffer.from("F1FG", "latin1")
     str = buf6.toString("latin1");
-    expect(str).assertEqual("F1FGe");
+    expect(str).assertEqual("F1FG");
 
     let buf7 = buffer.from("F1FG刘", "ucs2")
     str = buf7.toString("ucs2");