Icdiff cli options

pytest_icdiff.py

@@ -3,7 +3,7 @@
 from pprintpp import pformat
 import icdiff
 
-COLS = shutil.get_terminal_size().columns
+AUTO_COLS = shutil.get_terminal_size().columns
 MARGIN_L = 10
 GUTTER = 2
 MARGINS = MARGIN_L + GUTTER + 1
@@ -14,6 +14,50 @@
 #         f.write('\n')
 
 
+def pytest_addoption(parser):
+    parser.addoption(
+        "--icdiff-cols",
+        action="store",
+        default=None,
+        help="pytest-icdiff:  specify the width of the screen, in case autodetection fails you",
+    )
+    parser.addoption(
+        "--icdiff-show-all-spaces",
+        default=False,
+        action="store_true",
+        help="pytest-icdiff:  color all non-matching whitespace including that which is not needed for drawing the eye to changes.  Slow, ugly, displays all changes",
+    )
+    parser.addoption(
+        "--icdiff-highlight",
+        default=False,
+        action="store_true",
+        help="pytest-icdiff:  color by changing the background color instead of the foreground color.  Very fast, ugly, displays all changes",
+    )
+    parser.addoption(
+        "--icdiff-line-numbers",
+        default=False,
+        action="store_true",
+        help="pytest-icdiff:  generate output with line numbers. Not compatible with the 'exclude-lines' option.",
+    )
+    parser.addoption(
+        "--icdiff-tabsize",
+        default=2,
+        help="pytest-icdiff:  tab stop spacing",
+    )
+    parser.addoption(
+        "--icdiff-truncate",
+        default=False,
+        action="store_true",
+        help="pytest-icdiff:  truncate long lines instead of wrapping them",
+    )
+    parser.addoption(
+        "--icdiff-strip-trailing-cr",
+        default=False,
+        action="store_true",
+        help="pytest-icdiff:  strip any trailing carriage return at the end of an input line",
+    )
+
+
 def pytest_assertrepr_compare(config, op, left, right):
     if op != "==":
         return
@@ -28,23 +72,33 @@ def pytest_assertrepr_compare(config, op, left, right):
         # Bail out of generating a diff and use pytest default output
         return
 
+    COLS = int(config.getoption("--icdiff-cols") or AUTO_COLS)
     half_cols = COLS / 2 - MARGINS
+    TABSIZE = int(config.getoption("--icdiff-tabsize") or 2)
 
-    pretty_left = pformat(left, indent=2, width=half_cols).splitlines()
-    pretty_right = pformat(right, indent=2, width=half_cols).splitlines()
+    pretty_left = pformat(left, indent=TABSIZE, width=half_cols).splitlines()
+    pretty_right = pformat(right, indent=TABSIZE, width=half_cols).splitlines()
     diff_cols = COLS - MARGINS
 
     if len(pretty_left) < 3 or len(pretty_right) < 3:
         # avoid small diffs far apart by smooshing them up to the left
-        smallest_left = pformat(left, indent=2, width=1).splitlines()
-        smallest_right = pformat(right, indent=2, width=1).splitlines()
+        smallest_left = pformat(left, indent=TABSIZE, width=1).splitlines()
+        smallest_right = pformat(right, indent=TABSIZE, width=1).splitlines()
         max_side = max(len(l) + 1 for l in smallest_left + smallest_right)
         if (max_side * 2 + MARGINS) < COLS:
             diff_cols = max_side * 2 + GUTTER
-            pretty_left = pformat(left, indent=2, width=max_side).splitlines()
-            pretty_right = pformat(right, indent=2, width=max_side).splitlines()
+            pretty_left = pformat(left, indent=TABSIZE, width=max_side).splitlines()
+            pretty_right = pformat(right, indent=TABSIZE, width=max_side).splitlines()
 
-    differ = icdiff.ConsoleDiff(cols=diff_cols, tabsize=2)
+    differ = icdiff.ConsoleDiff(
+        cols=diff_cols,
+        show_all_spaces=config.getoption("--icdiff-show-all-spaces"),
+        highlight=config.getoption("--icdiff-highlight"),
+        line_numbers=config.getoption("--icdiff-line-numbers"),
+        tabsize=TABSIZE,
+        truncate=config.getoption("--icdiff-truncate"),
+        strip_trailing_cr=config.getoption("--icdiff-strip-trailing-cr"),
+    )
 
     if not config.get_terminal_writer().hasmarkup:
         # colorization is disabled in Pytest - either due to the terminal not

tests/test_pytest_icdiff.py

@@ -1,3 +1,4 @@
+import pytest
 import icdiff
 import re
 import sys
@@ -295,23 +296,25 @@ def test_one():
     assert "---" in output  # context split marker
 
 
-@pytest.mark.skipif('numpy' not in sys.modules, reason="requires numpy library")
+@pytest.mark.skipif("numpy" not in sys.modules, reason="requires numpy library")
 def test_np_arrays_can_use_equals(testdir) -> None:
     """
     Numpy iterables will fall back to pytest default output
     """
-    testdir.makepyfile("""
+    testdir.makepyfile(
+        """
     import numpy as np
 
     def test():
         result = np.array([1, 2, 3])
 
         assert all(result == 2)
-    """)
+    """
+    )
 
     result = testdir.runpytest()
 
     output = result.stdout.str()
-    assert 'ValueError' not in output
-    assert 'AssertionError' in output
-    assert 'where False = all(equals failed' not in output, 'pytest-icdiff not used'
+    assert "ValueError" not in output
+    assert "AssertionError" in output
+    assert "where False = all(equals failed" not in output, "pytest-icdiff not used"