Modify test file (#47544)

* 修改.gitigore文件，把ljd_sh文件忽略掉

* 修复改动单测文件没有触发精准测试的问题

* 取消改动.gitignore

* 修复改动单测没有出发精准测试的问题

* 修改变量名含义更加容易理解,test=coverage

tools/get_pr_ut.py

@@ -278,18 +278,20 @@ class PRChecker(object):
                 all_counts = line.split()[-1]
         return int(all_counts)
 
-    def file_is_unnit_test(self, filename):
+    def file_is_unnit_test(self, unittest_path):
         # get all testcases by ctest-N
         all_ut_file = '%s/build/all_ut_file' % PADDLE_ROOT
         os.system(
             "cd %s/build && ctest -N | awk -F ': ' '{print $2}' | sed '/^$/d' | sed '$d' > %s"
             % (PADDLE_ROOT, all_ut_file)
         )
+        (unittest_directory, unittest_name) = os.path.split(unittest_path)
         # determine whether filename is in all_ut_case
         with open(all_ut_file, 'r') as f:
-            (filepath, tempfilename) = os.path.split(filename)
-            for f_file in f:
-                if f_file.strip('\n') == tempfilename.split(".")[0]:
+            all_unittests = f.readlines()
+            for test in all_unittests:
+                test = test.replace('\n', '').strip()
+                if test == unittest_name.split(".")[0]:
                     return True
             else:
                 return False