New feature: Software columns - Part 3: Tests (#651)

* Add test_function_software_columns.py

* Improve coverage

test/test_functions/test_function_software_columns.py

@@ -0,0 +1,80 @@
+#!/usr/bin/python
+#  -*- coding: utf-8 -*-
+"""tests for software_columns
+
+:author: Benito López and the python-escpos developers
+:organization: `python-escpos <https://github.com/python-escpos>`_
+:copyright: Copyright (c) 2024 `python-escpos <https://github.com/python-escpos>`_
+:license: MIT
+"""
+
+
+import pytest
+
+
+def test_rearrange_into_cols(driver) -> None:
+    """
+    GIVEN a list of columnable text
+    WHEN the column width is different for each column and some strings exceed the max width
+    THEN check the strings are properly wrapped, truncated and rearranged into some columns
+    """
+
+    output = driver._rearrange_into_cols(
+        text_list=["fits", "row1 row2", "truncate and wrap"], widths=[4, 5, 6]
+    )
+    assert output == [["fits", "row1", "trunc."], ["", "row2", "and"], ["", "", "wrap"]]
+
+
+def test_add_padding_into_cols(driver) -> None:
+    """
+    GIVEN a list of strings
+    WHEN adding padding and different alignments to each string
+    THEN check the strings are correctly padded and aligned
+    """
+
+    output = driver._add_padding_into_cols(
+        text_list=["col1", "col2", "col3"],
+        widths=[6, 6, 6],
+        align=["center", "left", "right"],
+    )
+    assert output == [" col1 ", "col2  ", "  col3"]
+
+
+@pytest.mark.parametrize("text_list", ["", [], None])
+@pytest.mark.parametrize("widths", [30.5, "30", None])
+@pytest.mark.parametrize("align", ["invalid_align_name", "", None])
+def test_software_columns_invalid_args(driver, text_list, widths, align) -> None:
+    """
+    GIVEN a dummy printer object
+    WHEN non valid params are passed
+    THEN check raise exception
+    """
+    bad_text_list = {"text_list": text_list, "widths": 5, "align": "left"}
+    bad_widths = {"text_list": ["valid"], "widths": widths, "align": "left"}
+    bad_align = {"text_list": ["valid"], "widths": 5, "align": align}
+
+    bad_args = [bad_text_list, bad_widths, bad_align]
+    for kwargs in bad_args:
+        with pytest.raises(Exception):
+            driver.software_columns(**kwargs)
+        driver.close()
+
+
+@pytest.mark.parametrize(
+    "text_list",
+    [
+        ["col1", "col2", "col3"],
+        ["wrap this string", "wrap this string", "wrap this string"],
+        ["truncate_this_string", "truncate_this_string", "truncate_this_string"],
+    ],
+)
+@pytest.mark.parametrize("widths", [[10, 10, 10], [10], 30])
+@pytest.mark.parametrize("align", [["center", "left", "right"], ["center"], "center"])
+def test_software_columns_valid_args(driver, text_list, widths, align) -> None:
+    """
+    GIVEN a dummy printer object
+    WHEN valid params are passed
+    THEN check no errors
+    """
+    driver.software_columns(text_list=text_list, widths=widths, align=align)
+    driver.close()