Add edge-case fixtures and CLI tests

Author: Arturo R Montesinos

tests/fixtures/long_text_wrapping.ods

@@ -166,6 +166,84 @@ def test_multiline_cells_concatenate_paragraphs() -> None:
     assert "P1 P2 P3" in stdout_s2
 
 
+def test_mixed_types_column_fixture_renders_all_values() -> None:
+    project_root = Path(__file__).resolve().parents[1]
+    fixture = project_root / "tests" / "fixtures" / "mixed_types_column.ods"
+    assert fixture.exists()
+
+    result = run_cli(str(fixture))
+    assert result.returncode == 0
+    stdout = result.stdout
+
+    # Headers
+    for token in ("Row", "Value", "When"):
+        assert token in stdout
+
+    # Label column and mixed values column.
+    for token in ("R1", "R2", "R3", "R4", "42", "3.14", "Hello"):
+        assert token in stdout
+
+    # Date column: assert that both non-empty date cells render *something*.
+    # We don't pin the exact locale-specific formatting here, only that the
+    # year substrings appear.
+    assert "01/01/24" in stdout
+    assert "31/12/25" in stdout
+
+
+def test_long_text_wrapping_fixture_preserves_wide_column_contents() -> None:
+    project_root = Path(__file__).resolve().parents[1]
+    fixture = project_root / "tests" / "fixtures" / "long_text_wrapping.ods"
+    assert fixture.exists()
+
+    result = run_cli(str(fixture))
+    assert result.returncode == 0
+    stdout = result.stdout
+
+    assert "Short" in stdout
+    assert "VeryLongHeader" in stdout
+    assert "Short2" in stdout
+    assert "ok" in stdout
+    assert "This_is_a_very_long_piece_of_text_with_no_spaces" in stdout
+    assert "x" in stdout
+    assert "wrap" in stdout
+    assert "This cell has several words that may wrap in the terminal" in stdout
+    assert "y" in stdout
+
+
+def test_unicode_sheets_fixture_handles_non_ascii_sheet_and_cells() -> None:
+    project_root = Path(__file__).resolve().parents[1]
+    fixture = project_root / "tests" / "fixtures" / "unicode_sheets.ods"
+    assert fixture.exists()
+
+    # Default sheet should be accessible without --sheet.
+    result_default = run_cli(str(fixture))
+    assert result_default.returncode == 0
+    stdout_default = result_default.stdout
+    assert "Default" in stdout_default
+
+    # Second sheet with non-ASCII name.
+    result = run_cli("--sheet", "Σheet-✓", str(fixture))
+    assert result.returncode == 0
+    stdout = result.stdout
+
+    for token in ("α", "β", "ñandú", "東京", "emoji?", "✓"):
+        assert token in stdout
+
+
+def test_sparse_edges_fixture_keeps_outer_empty_rows_and_columns() -> None:
+    project_root = Path(__file__).resolve().parents[1]
+    fixture = project_root / "tests" / "fixtures" / "sparse_edges.ods"
+    assert fixture.exists()
+
+    result = run_cli("--range", "A1:D5", str(fixture))
+    assert result.returncode == 0
+    stdout = result.stdout
+
+    # Inner labels should be present.
+    for token in ("InnerTop", "InnerCenter", "InnerRight"):
+        assert token in stdout
+
+
 def test_parse_range_spec_normalizes_reversed_ranges() -> None:
     from odsview.cli import _parse_range_spec