fix: A sample column value of 0|0 is not being parsed correctly

tests/test_header.py

@@ -348,3 +348,25 @@ def test_header_has_header_line_positive_no_samples():
     assert not hdr.has_header_line("INFO", "AD")
     assert not hdr.has_header_line("FILTER", "PASS")
     assert not hdr.has_header_line("contig", "1")
+
+
+def test_header_get_format_field_info():
+    lines = []
+    samples = header.SamplesInfos(["one", "two", "three"])
+    hdr = header.Header(lines, samples)
+    gt_field_info = hdr.get_format_field_info("GT")
+
+    expected = header.RESERVED_FORMAT["GT"]
+
+    assert gt_field_info is expected
+
+
+def test_header_get_info_format_field_info():
+    lines = []
+    samples = header.SamplesInfos(["one", "two", "three"])
+    hdr = header.Header(lines, samples)
+    gt_field_info = hdr.get_info_field_info("AA")
+
+    expected = header.RESERVED_INFO["AA"]
+
+    assert gt_field_info is expected

vcfpy/header.py

@@ -396,18 +396,18 @@ def add_line(self, header_line):
 
     def get_info_field_info(self, key):
         """Return :py:class:`FieldInfo` for the given INFO field"""
-        return self._get_field_info("INFO", key)
+        return self._get_field_info("INFO", key, RESERVED_INFO)
 
     def get_format_field_info(self, key):
         """Return :py:class:`FieldInfo` for the given INFO field"""
-        return self._get_field_info("FORMAT", key)
+        return self._get_field_info("FORMAT", key, RESERVED_FORMAT)
 
-    def _get_field_info(self, type_, key):
+    def _get_field_info(self, type_, key, reserved):
         result = self._indices[type_].get(key)
         if result:
             return result
-        if key in RESERVED_INFO:
-            res = FieldInfo(RESERVED_INFO[key].type, RESERVED_INFO[key].number)
+        if key in reserved:
+            res = reserved[key]
         else:
             res = FieldInfo("String", HEADER_NUMBER_UNBOUNDED)
         warnings.warn(