@@ -420,17 +420,17 @@ def test_rename_override(self, rw_dir):
420420repo = Repo .init (rw_dir )
421421file_a = osp .join (rw_dir ,"file_a.txt" )
422422with open (file_a ,"w" ,encoding = 'utf-8' )as outfile :
423- outfile .write ("hello world" )
423+ outfile .write ("hello world\n " )
424424repo .git .add (Git .polish_url (file_a ))
425425repo .git .commit (message = "Added file_a.txt" )
426426
427427# remove file_a.txt
428428repo .git .rm (Git .polish_url (file_a ))
429429
430- # create and commit file_b.txt
430+ # create and commit file_b.txt with similarity index of 52
431431file_b = osp .join (rw_dir ,"file_b.txt" )
432432with open (file_b ,"w" ,encoding = 'utf-8' )as outfile :
433- outfile .write ("hello world" )
433+ outfile .write ("hello world\n hello world " )
434434repo .git .add (Git .polish_url (file_b ))
435435repo .git .commit (message = "Removed file_a.txt. Added file_b.txt" )
436436
@@ -458,3 +458,26 @@ def test_rename_override(self, rw_dir):
458458diff = diffs [1 ]
459459self .assertEqual (True ,diff .new_file )
460460self .assertEqual ('file_b.txt' ,diff .a_path )
461+
462+ # check diff with high similarity index
463+ diffs = commit_b .diff (commit_a ,split_single_char_options = False ,M = '75%' )
464+ self .assertEqual (2 ,len (diffs ))
465+
466+ # check fileA.txt deleted
467+ diff = diffs [0 ]
468+ self .assertEqual (True ,diff .deleted_file )
469+ self .assertEqual ('file_a.txt' ,diff .a_path )
470+
471+ # check fileB.txt added
472+ diff = diffs [1 ]
473+ self .assertEqual (True ,diff .new_file )
474+ self .assertEqual ('file_b.txt' ,diff .a_path )
475+
476+ # check diff with low similarity index
477+ diffs = commit_b .diff (commit_a ,split_single_char_options = False ,M = '40%' )
478+ self .assertEqual (1 ,len (diffs ))
479+ diff = diffs [0 ]
480+ self .assertEqual (True ,diff .renamed_file )
481+ self .assertEqual ('file_a.txt' ,diff .rename_from )
482+ self .assertEqual ('file_b.txt' ,diff .rename_to )
483+
