diff --git a/cat_win/tests/test_strings.py b/cat_win/tests/test_strings.py
new file mode 100644
index 00000000..512b4b8d
--- /dev/null
+++ b/cat_win/tests/test_strings.py
@@ -0,0 +1,109 @@
+from unittest import TestCase
+import os
+
+from cat_win.util.strings import get_strings
+# import sys
+# sys.path.append('../cat_win')
+
+
+test_file_dir = os.path.join(os.path.dirname(__file__), 'texts')
+test_file_path = os.path.join(test_file_dir, 'test.bin')
+with open(test_file_path, 'rb') as raw_f:
+    test_content = [('', line) for line in raw_f.read().splitlines()]
+
+class TestFile(TestCase):
+    def test_get_strings_default(self):
+        # unix : "strings test.bin"
+        c_output = """/lib64/ld-linux-x86-64.so.2
+__cxa_finalize
+__libc_start_main
+puts
+libc.so.6
+GLIBC_2.2.5
+GLIBC_2.34
+_ITM_deregisterTMCloneTable
+__gmon_start__
+_ITM_registerTMCloneTable
+PTE1
+u+UH
+hello world
+:*3$"
+GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0
+Scrt1.o
+__abi_tag
+crtstuff.c
+deregister_tm_clones
+__do_global_dtors_aux
+completed.0
+__do_global_dtors_aux_fini_array_entry
+frame_dummy
+__frame_dummy_init_array_entry
+test.c
+__FRAME_END__
+_DYNAMIC
+__GNU_EH_FRAME_HDR
+_GLOBAL_OFFSET_TABLE_
+__libc_start_main@GLIBC_2.34
+_ITM_deregisterTMCloneTable
+puts@GLIBC_2.2.5
+_edata
+_fini
+__data_start
+__gmon_start__
+__dso_handle
+_IO_stdin_used
+_end
+__bss_start
+main
+__TMC_END__
+_ITM_registerTMCloneTable
+__cxa_finalize@GLIBC_2.2.5
+_init
+.symtab
+.strtab
+.shstrtab
+.interp
+.note.gnu.property
+.note.gnu.build-id
+.note.ABI-tag
+.gnu.hash
+.dynsym
+.dynstr
+.gnu.version
+.gnu.version_r
+.rela.dyn
+.rela.plt
+.init
+.plt.got
+.plt.sec
+.text
+.fini
+.rodata
+.eh_frame_hdr
+.eh_frame
+.init_array
+.fini_array
+.dynamic
+.data
+.bss
+.comment"""
+        output = get_strings(test_content, 4, '\n')
+        self.assertEqual(c_output, '\n'.join(map(lambda x: x[1], output)))
+
+    def test_get_strings_long(self):
+        # unix : "strings test.bin -n 20"
+        c_output = """/lib64/ld-linux-x86-64.so.2
+_ITM_deregisterTMCloneTable
+_ITM_registerTMCloneTable
+GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0
+deregister_tm_clones
+__do_global_dtors_aux
+__do_global_dtors_aux_fini_array_entry
+__frame_dummy_init_array_entry
+_GLOBAL_OFFSET_TABLE_
+__libc_start_main@GLIBC_2.34
+_ITM_deregisterTMCloneTable
+_ITM_registerTMCloneTable
+__cxa_finalize@GLIBC_2.2.5"""
+        output = get_strings(test_content, 20, '\n')
+        self.assertEqual(c_output, '\n'.join(map(lambda x: x[1], output)))
diff --git a/cat_win/tests/texts/test.bin b/cat_win/tests/texts/test.bin
new file mode 100644
index 00000000..4e9f0706
Binary files /dev/null and b/cat_win/tests/texts/test.bin differ