add test files as conftest fixture

Author: cadenmyers13

tests/conftest.py

@@ -269,3 +269,102 @@ def temp_data_files(tmp_path):
 """
     )
     yield tmp_path
+
+
+@pytest.fixture
+def parser_datafile(tmp_path):
+    """Create temporary data files with different column layouts and
+    yield the directory."""
+
+    METADATA_HEADER = r"""# xPDFsuite Configuration #
+[PDF]
+wavelength = 0.1
+dataformat = QA
+inputfile = input.iq
+backgroundfile = backgroundfile.iq
+mode = xray
+bgscale = 1.0
+composition = TiSe2
+outputtype = gr
+qmaxinst = 25.0
+qmin = 0.1
+qmax = 25.0
+rmax = 140.0
+rmin = 0.0
+rstep = 0.01
+rpoly = 0.7
+
+[Misc]
+inputdir = /my/data/dir
+savedir = /my/save/dir
+backgroundfilefull = /my/data/dir/backgroundfile.iq
+
+#### start data
+#S 1
+"""
+
+    # Four-column standard
+    (tmp_path / "four_col.gr").write_text(
+        METADATA_HEADER
+        + r"""#L r($\AA$)  G($\AA^{-2}$) dr($\AA$) dG($\AA^{-2}$)
+1.0 2.0 0.1 0.2
+1.1 2.1 0.3 0.4
+1.2 2.2 0.5 0.6"""
+    )
+
+    # Three-column (x, y, dy)
+    (tmp_path / "three_col.dat").write_text(
+        METADATA_HEADER
+        + r"""#L r($\AA$)  G($\AA^{-2}$) dG($\AA^{-2}$)
+1.0 2.0 0.2
+1.1 2.1 0.4
+1.2 2.2 0.6"""
+    )
+
+    # Two-column (x, y)
+    (tmp_path / "two_col.txt").write_text(
+        METADATA_HEADER
+        + r"""#L r($\AA$)  G($\AA^{-2}$)
+1.0 2.0
+1.1 2.1
+1.2 2.2"""
+    )
+
+    # Four-column reordered (x, dx, y, dy)
+    (tmp_path / "four_col_reordered.txt").write_text(
+        METADATA_HEADER
+        + r"""#L r($\AA$) dr($\AA$) G($\AA^{-2}$) dG($\AA^{-2}$)
+1.0 0.1 2.0 0.2
+1.1 0.3 2.1 0.4
+1.2 0.5 2.2 0.6"""
+    )
+
+    # Four-column with NaN/Inf
+    (tmp_path / "four_col_nan_inf.gr").write_text(
+        METADATA_HEADER
+        + r"""#L r($\AA$)  G($\AA^{-2}$) dr($\AA$) dG($\AA^{-2}$)
+1.0 2.0 nan inf
+1.1 2.1 inf 1
+1.2 2.2 nan nan"""
+    )
+
+    # One-column
+    (tmp_path / "one_col.gr").write_text(
+        METADATA_HEADER
+        + r"""#L r($\AA$)
+1.0
+1.1
+1.2"""
+    )
+
+    # Five-column (extra column)
+    (tmp_path / "five_col.gr").write_text(
+        METADATA_HEADER
+        + r"""#L r($\AA$)  G($\AA^{-2}$) dr($\AA$) dG($\AA^{-2}$) extra
+1.0 2.0 0.1 0.2 9.9
+1.1 2.1 0.3 0.4 9.8
+1.2 2.2 0.5 0.6 9.7"""
+    )
+
+    # Yield the directory
+    yield tmp_path