From a54d95e47fd603718dc506dcfce0cfa519248292 Mon Sep 17 00:00:00 2001
From: Taneli Hukkinen <3275109+hukkin@users.noreply.github.com>
Date: Mon, 3 Jan 2022 04:29:16 +0200
Subject: [PATCH] Remove python-dateutil test dependency (#158)

---
 .pre-commit-config.yaml |  1 -
 tests/burntsushi.py     | 23 +++++++++++++++++++++--
 tests/requirements.txt  |  1 -
 3 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e50d256..a139350 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -51,5 +51,4 @@ repos:
   - id: mypy
     args: ["--scripts-are-modules"]
     additional_dependencies:
-    - types-python-dateutil
     - pytest
diff --git a/tests/burntsushi.py b/tests/burntsushi.py
index 54087cb..44cea5b 100644
--- a/tests/burntsushi.py
+++ b/tests/burntsushi.py
@@ -3,7 +3,6 @@
 import datetime
 from typing import Any
 
-import dateutil.parser
 import pytest
 
 
@@ -66,7 +65,27 @@ def normalize(d: dict) -> dict:
 
 
 def normalize_datetime_str(dt_str: str) -> str:
-    return dateutil.parser.isoparse(dt_str).isoformat()
+    if dt_str[-1].lower() == "z":
+        dt_str = dt_str[:-1] + "+00:00"
+
+    date = dt_str[:10]
+    rest = dt_str[11:]
+
+    if "+" in rest:
+        sign = "+"
+    elif "-" in rest:
+        sign = "-"
+    else:
+        sign = ""
+
+    if sign:
+        time, _, offset = rest.partition(sign)
+    else:
+        time = rest
+        offset = ""
+
+    time = time.rstrip("0") if "." in time else time
+    return date + "T" + time + sign + offset
 
 
 def normalize_float_str(float_str: str) -> str:
diff --git a/tests/requirements.txt b/tests/requirements.txt
index ce5780e..c34e694 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -1,5 +1,4 @@
 pytest
 pytest-randomly
 pytest-cov >=2.12.1
-python-dateutil
 coverage !=6.0