From bec8218c257a09f25224a8c005bd90919044e418 Mon Sep 17 00:00:00 2001
From: Wutipong Wongsakuldej <mr_tawan@hotmail.com>
Date: Mon, 20 Nov 2023 22:17:56 +0700
Subject: [PATCH] add textutils module.

---
 .gitignore         |  1 +
 test_textutitls.py | 29 +++++++++++++++++++++++++++++
 textutils.py       | 11 +++++++++++
 3 files changed, 41 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 test_textutitls.py
 create mode 100644 textutils.py

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ed8ebf5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+__pycache__
\ No newline at end of file
diff --git a/test_textutitls.py b/test_textutitls.py
new file mode 100644
index 0000000..a936c8c
--- /dev/null
+++ b/test_textutitls.py
@@ -0,0 +1,29 @@
+import textutils
+import unittest
+
+class TestTextUtils(unittest.TestCase):
+    def test_positive_tokens(self):
+        self.assertEqual(textutils.create_n_tokens("hello/world/how/are/you/doing", "/", 0), "")
+        self.assertEqual(textutils.create_n_tokens("hello/world/how/are/you/doing", "/", 1), "hello")
+        self.assertEqual(textutils.create_n_tokens("hello/world/how/are/you/doing", "/", 2), "hello/world")
+
+        
+    def test_negative_tokens(self):
+        self.assertEqual(textutils.create_n_tokens("hello/world/how/are/you/doing", "/", -1), "doing")
+        self.assertEqual(textutils.create_n_tokens("hello/world/how/are/you/doing", "/", -2), "you/doing")
+
+    def test_n_exceed_length(self):
+        self.assertEqual(textutils.create_n_tokens("hello/world/how/are/you/doing", "/", 8), "hello/world/how/are/you/doing")
+        self.assertEqual(textutils.create_n_tokens("hello/world/how/are/you/doing", "/", -6), "hello/world/how/are/you/doing")
+
+    def test_delim_at_the_begining(self):
+        self.assertEqual(textutils.create_n_tokens("/hello/world/how/are/you/doing/", "/", 0), "")
+        self.assertEqual(textutils.create_n_tokens("/hello/world/how/are/you/doing/", "/", 1), "")
+        self.assertEqual(textutils.create_n_tokens("/hello/world/how/are/you/doing/", "/", 2), "/hello")
+
+    def test_delim_at_the_end(self):
+        self.assertEqual(textutils.create_n_tokens("hello/world/how/are/you/doing/", "/", -1), "")
+        self.assertEqual(textutils.create_n_tokens("hello/world/how/are/you/doing/", "/", -2), "doing/")
+
+if __name__ == '__main__':
+    unittest.main()
\ No newline at end of file
diff --git a/textutils.py b/textutils.py
new file mode 100644
index 0000000..ed17d1e
--- /dev/null
+++ b/textutils.py
@@ -0,0 +1,11 @@
+def create_n_tokens(str, delim, n):
+    parts = str.split(delim)
+
+    if n > 0 :
+        return delim.join(parts[0: n])
+    else :
+        l = len(parts)
+        start = l + n
+        if start < 0: start = 0
+
+        return delim.join(parts[start: l])
\ No newline at end of file