tests versuch 2

venv/lib/python3.11/site-packages/coverage/lcovreport.py

@@ -0,0 +1,126 @@
+# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
+# For details: https://github.com/nedbat/coveragepy/blob/master/NOTICE.txt
+
+"""LCOV reporting for coverage.py."""
+
+from __future__ import annotations
+
+import base64
+import hashlib
+import sys
+
+from typing import IO, Iterable, Optional, TYPE_CHECKING
+
+from coverage.plugin import FileReporter
+from coverage.report_core import get_analysis_to_report
+from coverage.results import Analysis, Numbers
+from coverage.types import TMorf
+
+if TYPE_CHECKING:
+    from coverage import Coverage
+
+
+def line_hash(line: str) -> str:
+    """Produce a hash of a source line for use in the LCOV file."""
+    hashed = hashlib.md5(line.encode("utf-8")).digest()
+    return base64.b64encode(hashed).decode("ascii").rstrip("=")
+
+
+class LcovReporter:
+    """A reporter for writing LCOV coverage reports."""
+
+    report_type = "LCOV report"
+
+    def __init__(self, coverage: Coverage) -> None:
+        self.coverage = coverage
+        self.total = Numbers(self.coverage.config.precision)
+
+    def report(self, morfs: Optional[Iterable[TMorf]], outfile: IO[str]) -> float:
+        """Renders the full lcov report.
+
+        `morfs` is a list of modules or filenames
+
+        outfile is the file object to write the file into.
+        """
+
+        self.coverage.get_data()
+        outfile = outfile or sys.stdout
+
+        for fr, analysis in get_analysis_to_report(self.coverage, morfs):
+            self.get_lcov(fr, analysis, outfile)
+
+        return self.total.n_statements and self.total.pc_covered
+
+    def get_lcov(self, fr: FileReporter, analysis: Analysis, outfile: IO[str]) -> None:
+        """Produces the lcov data for a single file.
+
+        This currently supports both line and branch coverage,
+        however function coverage is not supported.
+        """
+        self.total += analysis.numbers
+
+        outfile.write("TN:\n")
+        outfile.write(f"SF:{fr.relative_filename()}\n")
+        source_lines = fr.source().splitlines()
+
+        for covered in sorted(analysis.executed):
+            # Note: Coverage.py currently only supports checking *if* a line
+            # has been executed, not how many times, so we set this to 1 for
+            # nice output even if it's technically incorrect.
+
+            # The lines below calculate a 64-bit encoded md5 hash of the line
+            # corresponding to the DA lines in the lcov file, for either case
+            # of the line being covered or missed in coverage.py. The final two
+            # characters of the encoding ("==") are removed from the hash to
+            # allow genhtml to run on the resulting lcov file.
+            if source_lines:
+                if covered-1 >= len(source_lines):
+                    break
+                line = source_lines[covered-1]
+            else:
+                line = ""
+            outfile.write(f"DA:{covered},1,{line_hash(line)}\n")
+
+        for missed in sorted(analysis.missing):
+            assert source_lines
+            line = source_lines[missed-1]
+            outfile.write(f"DA:{missed},0,{line_hash(line)}\n")
+
+        outfile.write(f"LF:{analysis.numbers.n_statements}\n")
+        outfile.write(f"LH:{analysis.numbers.n_executed}\n")
+
+        # More information dense branch coverage data.
+        missing_arcs = analysis.missing_branch_arcs()
+        executed_arcs = analysis.executed_branch_arcs()
+        for block_number, block_line_number in enumerate(
+            sorted(analysis.branch_stats().keys())
+        ):
+            for branch_number, line_number in enumerate(
+                sorted(missing_arcs[block_line_number])
+            ):
+                # The exit branches have a negative line number,
+                # this will not produce valid lcov. Setting
+                # the line number of the exit branch to 0 will allow
+                # for valid lcov, while preserving the data.
+                line_number = max(line_number, 0)
+                outfile.write(f"BRDA:{line_number},{block_number},{branch_number},-\n")
+
+            # The start value below allows for the block number to be
+            # preserved between these two for loops (stopping the loop from
+            # resetting the value of the block number to 0).
+            for branch_number, line_number in enumerate(
+                sorted(executed_arcs[block_line_number]),
+                start=len(missing_arcs[block_line_number]),
+            ):
+                line_number = max(line_number, 0)
+                outfile.write(f"BRDA:{line_number},{block_number},{branch_number},1\n")
+
+        # Summary of the branch coverage.
+        if analysis.has_arcs():
+            branch_stats = analysis.branch_stats()
+            brf = sum(t for t, k in branch_stats.values())
+            brh = brf - sum(t - k for t, k in branch_stats.values())
+            outfile.write(f"BRF:{brf}\n")
+            outfile.write(f"BRH:{brh}\n")
+
+        outfile.write("end_of_record\n")