fix context reporting for relative_files

fix reporting of contexts when `relative_files = True`

fixes #900

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/test_html.py b/tests/test_html.py
index 6c4c706c..b543fa08 100644
--- a/tests/test_html.py
+++ b/tests/test_html.py
@@ -1127,3 +1127,20 @@ class HtmlWithContextsTest(HtmlTestHelpers, CoverageTest):
         self.start_import_stop(cov, "two_tests")
         with self.assert_warnings(cov, ["No contexts were measured"]):
             cov.html_report()
+
+    def test_dynamic_contexts_relative_files(self):
+        self.make_file("two_tests.py", self.SOURCE)
+        self.make_file("config", "[run]\nrelative_files = True")
+        cov = coverage.Coverage(source=["."], config_file="config")
+        cov.set_option("run:dynamic_context", "test_function")
+        cov.set_option("html:show_contexts", True)
+        mod = self.start_import_stop(cov, "two_tests")
+        d = self.html_data_from_cov(cov, mod)
+        context_labels = [self.EMPTY, 'two_tests.test_one', 'two_tests.test_two']
+        expected_lines = [self.OUTER_LINES, self.TEST_ONE_LINES, self.TEST_TWO_LINES]
+        for label, expected in zip(context_labels, expected_lines):
+            actual = [
+                ld.number for ld in d.lines
+                if label == ld.contexts_label or label in (ld.contexts or ())
+            ]
+            assert sorted(expected) == sorted(actual)