test: add compose_chart_export doctests

compose_chart_export/src/compose_chart_export/chart_combiner.py

@@ -70,10 +70,6 @@ def combine(old_path: Path, new_path: Path) -> None:
 def ensure_no_update_lines_kept(
     old_lines: list[str], new_lines: list[str], rel_path: str
 ) -> list[str]:
-    """
-    >>> ensure_no_update_lines_kept(["{{- if .Values.deployment.enabled }} # noupdate", "line1", "line2", "{{- end }} # noupdate", "final line # noupdate"], ["newline1", "newline2"])
-    ['{{- if .Values.deployment.enabled }} # noupdate', 'newline1', 'newline2', '{{- end }} # noupdate', 'final line # noupdate']
-    """
     extra_old_lines_start: list[str] = []
     extra_old_lines_end: list[str] = []
     at_start = True

compose_chart_export/tests/test_chart_export/test_doctests.py

@@ -0,0 +1,29 @@
+import pytest
+import xdoctest as xdoc  # type: ignore
+
+from compose_chart_export import (
+    chart_combiner,
+    chart_file_templates,
+    chart_mods,
+    chart_read,
+    compose_export,
+    ports,
+    settings,
+)
+
+
+@pytest.mark.parametrize(
+    "module",
+    [
+        chart_combiner,
+        chart_mods,
+        chart_read,
+        ports,
+        chart_file_templates,
+        compose_export,
+        settings,
+    ],
+)
+def test_chart_export_doctests(module):
+    return_code = xdoc.doctest_module(module.__file__, command="all", verbose=1)
+    assert not return_code["failed"]