Fix issue with single segment trend lines

mobius/csv.py

@@ -99,7 +99,7 @@ def categorise_paths(paths, name, date_lookup):
         single_segment_lines.sort(key=lambda p: p.length())
 
         short_trends = single_segment_lines[:-5]
-        single_segment_lines = single_segment_lines[:5]
+        single_segment_lines = single_segment_lines[-5:]
 
     y_lines = sorted([path.start.imag for path in single_segment_lines])
 

tests/test_csv.py

@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+from svgpathtools.path import Path, Line
+
+import mobius
+
+
+def test_single_segment_lines():
+    # Given
+    paths = [
+        (Path(Line(start=(24058.2+8686.78j), end=(24534.52+8686.78j))), None),  # horizontal line - bottom
+        (Path(Line(start=(24058.2+8627.24j), end=(24534.52+8627.24j))), None),  # horizontal line
+        (Path(Line(start=(24058.2+8567.7j), end=(24534.52+8567.7j))), None),  # horizontal line - baseline
+        (Path(Line(start=(24058.2+8508.16j), end=(24534.52+8508.16j))), None),  # horizontal line
+        (Path(Line(start=(24058.2+8448.62j), end=(24534.52+8448.62j))), None),  # horizontal line - top
+        (Path(Line(start=(24523.2+8664.45j), end=(24534.54+8663.114000000001j))), None)]  # Trend line
+
+    date_lookup = mobius.io.read_dates_lookup(filepath="../config/dates_lookup.csv")
+
+    # When
+    df = mobius.csv.csv_process(paths, 1, date_lookup, output_folder=None, plots=False, save=None)
+
+    # Then
+    assert round(df.at[42, "value"]) == -64