From d8db75610b516583851a17feeb3b91fad5e423e1 Mon Sep 17 00:00:00 2001
From: surister <surister98@gmail.com>
Date: Sat, 21 Dec 2019 19:24:34 +0100
Subject: [PATCH] Add syntax checker suite

---
 tests/syntax_checker.py | 112 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 tests/syntax_checker.py

diff --git a/tests/syntax_checker.py b/tests/syntax_checker.py
new file mode 100644
index 0000000..6c7d30b
--- /dev/null
+++ b/tests/syntax_checker.py
@@ -0,0 +1,112 @@
+"""
+Testing suite for https://github.com/bregman-arie/devops-interview-questions written by surister
+
+Even though both check_details_tag and check_summary_tags are practically the same, due to readability and functionality
+it was decided to be split like that.
+
+Usage:
+$ python tests/syntax_checker.py
+
+"""
+
+import pathlib
+
+p = pathlib.Path(__file__).parent.parent.joinpath('README.md')
+
+with open(p, 'rb') as f:
+    file_list = [line.rstrip() for line in f.readlines()]
+
+errors = []
+
+
+def count_details(file_list):
+    """
+    Counts the total amount of <details> and </details>
+
+    Used for debugging purpose, not meant to be used in actual tests
+    """
+    details_final_count = 0
+    details_count = 0
+
+    for line_number, line in enumerate(file_list):
+        if b'<details>' in line:
+            details_count += 1
+        if b'</details>' in line:
+            details_final_count += 1
+
+    return details_count, details_final_count
+
+
+def check_details_tag(file_list):
+    """
+    Check whether the structure:
+    <details>
+    ...
+    </details>
+
+    Is correctly followed, if not generates an error.
+
+    """
+
+    after_detail = False
+    error = False
+    err_message = ''
+    for line_number, line in enumerate(file_list):
+        if b'<details>' in line and b'</details>' in line:
+            pass
+        else:
+            if b'<details>' in line and after_detail:
+                error = True
+            if b'</details>' in line and not after_detail:
+                err_message = 'Missing opening detail tag'
+                error = True
+
+            if b'<details>' in line:
+                after_detail = True
+
+            if b'</details>' in line and after_detail:
+                err_message = 'Missing closing detail tag'
+                after_detail = False
+
+            if error:
+                raise Exception(f'{err_message} at line {line_number -1}')
+
+
+def check_summary_tag(file_list):
+    """
+    Check whether the structure:
+    <summary>
+    ...
+    </summary>
+
+    Is correctly followed, if not generates an error.
+
+    """
+
+    after_detail = False
+    error = False
+    err_message = ''
+    for line_number, line in enumerate(file_list):
+        if b'<summary>' in line and b'</summary>' in line:
+            pass
+        else:
+            if b'<summary>' in line and after_detail:
+                error = True
+            if b'</summary>' in line and not after_detail:
+                err_message = 'Missing opening detail tag'
+                error = True
+
+            if b'<summary>' in line:
+                after_detail = True
+
+            if b'</summary>' in line and after_detail:
+                err_message = 'Missing closing detail tag'
+                after_detail = False
+
+            if error:
+                raise Exception(f'{err_message} at line {line_number -3}')
+
+
+if __name__ == '__main__':
+    check_details_tag(file_list)
+    check_summary_tag(file_list)