fix: Fix finding runs when the needle ends on the last character

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "cmi-docx"
-version = "0.3.6"
+version = "0.3.7"
 description = "Additional tooling for Python-docx."
 readme = "README.md"
 requires-python = ">=3.10"

src/cmi_docx/paragraph.py

@@ -70,10 +70,13 @@ def find_in_runs(self, needle: str) -> list[run.FindRun]:
         run_finds: list[run.FindRun] = []
         run_lengths = [len(run.text) for run in self.paragraph.runs]
         cumulative_run_lengths = list(itertools.accumulate(run_lengths))
+
         for occurence in self.find_in_paragraph(needle).character_indices:
             start_run = bisect.bisect_right(cumulative_run_lengths, occurence[0])
             end_run = bisect.bisect_right(
-                cumulative_run_lengths[:-1], occurence[1], lo=start_run
+                cumulative_run_lengths[:-1],
+                occurence[1] - 1,  # -1 as the range does not include the last character
+                lo=start_run,
             )
 
             start_index = (

tests/test_paragraph.py

@@ -66,6 +66,19 @@ def test_find_in_single_run(sample_paragraph: docx_paragraph.Paragraph) -> None:
     assert actual[1].character_indices == expected[1].character_indices
 
 
+def test_find_in_single_run_complete() -> None:
+    """Tests finding an exact match of a run."""
+    document = docx.Document()
+    para = document.add_paragraph("This is a sample paragraph.")
+    para.add_run("full-run")
+    para.add_run("another")
+    extend_paragraph = paragraph.ExtendParagraph(para)
+
+    actual = extend_paragraph.find_in_runs("full-run")
+
+    assert len(actual[0].runs) == 1
+
+
 def test_replace_single_run(sample_paragraph: docx_paragraph.Paragraph) -> None:
     """Test replacing text in a paragraph."""
     extend_paragraph = paragraph.ExtendParagraph(sample_paragraph)