add tests for io.xsv

Author: trichter

sugar/core/fts.py

@@ -427,9 +427,9 @@ def frompandas(cls, df, ftype=None):
                 df['type'] = ftype
         if 'len' in df:
             df = df.copy()
-            if 'start' in df and 'stop' not in f:
+            if 'start' in df and 'stop' not in df:
                 df['stop'] = df['start'] + df['len']
-            elif 'start' not in df and 'stop' in f:
+            elif 'start' not in df and 'stop' in df:
                 df['start'] = df['stop'] - df['len']
             del df['len']
         fts = []

sugar/tests/test_io_tab_xsv.py

@@ -0,0 +1,34 @@
+# (C) 2024, Tom Eulenfeld, MIT license
+import io
+import pytest
+from sugar import read_fts
+
+
+def test_tsv():
+    pytest.importorskip('pandas')
+    fts = read_fts()
+    out = fts.write(None, 'tsv')
+    fts2 = read_fts(io.StringIO(out))
+    fts3 = read_fts('!data/fts_example.tsv')
+    assert fts2 == fts3
+
+
+def test_csv():
+    pytest.importorskip('pandas')
+    fts = read_fts()
+    out = fts.write(None, 'csv')
+    fts2 = read_fts(io.StringIO(out))
+    fts3 = read_fts('!data/fts_example.csv')
+    assert fts2 == fts3
+
+
+def test_xsv_edgecases():
+    pytest.importorskip('pandas')
+    fts = read_fts()
+    out = fts.write(None, 'csv', sep=' ', vals='type start len strand defect')
+    fts2 = read_fts(io.StringIO(out), sep=None, engine='python')
+    fts3 = read_fts('!data/fts_example.tsv')
+    assert fts2 == fts3
+    out = fts.write(None, 'csv', sep='|', vals='type stop len strand defect')
+    fts2 = read_fts(io.StringIO(out), sep='|')
+    assert fts2 == fts3