fix: merge the missing groups with max annotation gap

codecov/diff_grouper.py

@@ -57,25 +57,34 @@ def get_branch_missing_groups(
 ) -> Iterable[groups.Group]:
     for path, _ in diff_coverage.files.items():
         coverage_file = coverage.files[path]
-        separators = {
-            *flatten_branches(coverage_file.executed_branches),
-            *coverage_file.excluded_lines,
-        }
-        joiners = set(range(1, coverage_file.info.num_statements)) - separators
-
-        for start, end in groups.compute_contiguous_groups(
-            values=flatten_branches(branches=coverage_file.missing_branches),
-            separators=separators,
-            joiners=joiners,
-            max_gap=MAX_ANNOTATION_GAP,
-        ):
+        for start, end in coverage_file.missing_branches or []:
             yield groups.Group(
                 file=path,
                 line_start=start,
                 line_end=end,
             )
 
 
+def group_branches(coverage: coverage_module.Coverage) -> coverage_module.Coverage:
+    for file_coverage in coverage.files.values():
+        separators = {
+            *flatten_branches(file_coverage.executed_branches),
+            *file_coverage.excluded_lines,
+        }
+        joiners = set(range(1, file_coverage.info.num_statements)) - separators
+
+        file_coverage.missing_branches = [
+            [start, end]
+            for start, end in groups.compute_contiguous_groups(
+                values=flatten_branches(branches=file_coverage.missing_branches),
+                separators=separators,
+                joiners=joiners,
+                max_gap=MAX_ANNOTATION_GAP,
+            )
+        ]
+    return coverage
+
+
 def get_diff_missing_groups(
     coverage: coverage_module.Coverage,
     diff_coverage: coverage_module.DiffCoverage,

codecov/main.py

@@ -67,6 +67,8 @@ def process_pr(  # pylint: disable=too-many-locals
     pr_number: int,
 ) -> int:
     coverage = coverage_module.get_coverage_info(coverage_path=config.COVERAGE_PATH)
+    if config.BRANCH_COVERAGE:
+        coverage = diff_grouper.group_branches(coverage=coverage)
     base_ref = config.GITHUB_BASE_REF or repo_info.default_branch
     pr_diff = github.get_pr_diff(github=gh, repository=config.GITHUB_REPOSITORY, pr_number=pr_number)
     added_lines = coverage_module.parse_diff_output(diff=pr_diff)

tests/test_diff_grouper.py

@@ -65,7 +65,8 @@ def test_group_branch_annotations(coverage_obj, diff_coverage_obj):
     result = diff_grouper.get_branch_missing_groups(coverage=coverage_obj, diff_coverage=diff_coverage_obj)
 
     assert list(result) == [
-        groups.Group(file=pathlib.Path('codebase/code.py'), line_start=5, line_end=11),
+        groups.Group(file=pathlib.Path('codebase/code.py'), line_start=5, line_end=6),
+        groups.Group(file=pathlib.Path('codebase/code.py'), line_start=10, line_end=11),
     ]
 
 
@@ -76,6 +77,9 @@ def test_group_branch_annotations_more_files(coverage_obj_more_files, diff_cover
     )
 
     assert list(result) == [
-        groups.Group(file=pathlib.Path('codebase/code.py'), line_start=4, line_end=8),
-        groups.Group(file=pathlib.Path('codebase/other.py'), line_start=2, line_end=9),
+        groups.Group(file=pathlib.Path('codebase/code.py'), line_start=4, line_end=5),
+        groups.Group(file=pathlib.Path('codebase/code.py'), line_start=7, line_end=8),
+        groups.Group(file=pathlib.Path('codebase/other.py'), line_start=2, line_end=3),
+        groups.Group(file=pathlib.Path('codebase/other.py'), line_start=4, line_end=5),
+        groups.Group(file=pathlib.Path('codebase/other.py'), line_start=8, line_end=9),
     ]