From 6ac04e44520493121558eb47b0258b7088ec6f03 Mon Sep 17 00:00:00 2001
From: Filip <filip.strajnar@gmail.com>
Date: Sun, 28 Sep 2025 11:52:16 +0200
Subject: [PATCH] Assert minimum datetime.

---
 src/corchestrate/chart.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/corchestrate/chart.py b/src/corchestrate/chart.py
index c94cf15..b0fd356 100644
--- a/src/corchestrate/chart.py
+++ b/src/corchestrate/chart.py
@@ -43,6 +43,9 @@ def plot_over_time(input_data: list[ChartData]):
             if current_measurement is None:
                 continue
 
+            # Ensure min_datetime is minimum.
+            assert current_measurement.measured_at >= min_datetime
+
             if current_measurement.measured_at == min_datetime:
                 indexed_input.extracted_heart_rate.append(
                     current_measurement.heart_rate)