1 files changed, 69 insertions, 0 deletions
diff --git a/tests/lint_tests/test_lint_dctrl.py b/tests/lint_tests/test_lint_dctrl.py
index 80d7525..229acc1 100644
--- a/tests/lint_tests/test_lint_dctrl.py
+++ b/tests/lint_tests/test_lint_dctrl.py
@@ -1209,3 +1209,72 @@ def test_dctrl_lint_dep_field_restricted_or_relations(
     assert problem_text == "|"
     assert f"{issue.range}" == "13:1-13:2"
     assert issue.severity == DiagnosticSeverity.Error
+
+
+def test_dctrl_duplicate_key(line_linter: LintWrapper) -> None:
+    lines = textwrap.dedent(
+        f"""\
+        Source: jquery-tablesorter
+        Section: javascript
+        Priority: optional
+        Maintainer: Debian Javascript Maintainers <pkg-javascript-devel@lists.alioth.de\
+        bian.org>
+        Uploaders: Paul Gevers <elbrus@debian.org>
+        Build-Depends:
+         debhelper-compat (=13),
+         grunt,
+         libjs-qunit,
+         node-grunt-contrib-clean,
+         node-grunt-contrib-copy,
+         node-grunt-contrib-uglify,
+         node-grunt-contrib-concat,
+        Standards-Version: {CURRENT_STANDARDS_VERSION}
+        Homepage: https://github.com/Mottie/tablesorter
+        Vcs-Git: https://salsa.debian.org/js-team/jquery-tablesorter.git
+        Vcs-Browser: https://salsa.debian.org/js-team/jquery-tablesorter
+        Rules-Requires-Root: no
+
+        Package: libjs-jquery-tablesorter
+        Architecture: all
+        Multi-Arch: foreign
+        Depends:
+         ${{misc:Depends}},
+         libjs-jquery,
+         libjs-jquery-metadata,
+        Recommends: javascript-common
+        Multi-Arch: foreign
+        Description: jQuery flexible client-side table sorting plugin
+         Tablesorter is a jQuery plugin for turning a standard HTML table with THEAD
+         and TBODY tags into a sortable table without page refreshes. Tablesorter can
+         successfully parse and sort many types of data including linked data in a
+         cell. It has many useful features including:
+         .
+           * Multi-column alphanumeric sorting and filtering.
+           * Multi-tbody sorting
+           * Supports Bootstrap v2-4.
+           * Parsers for sorting text, alphanumeric text, URIs, integers, currency,
+             floats, IP addresses, dates (ISO, long and short formats) and time.
+             Add your own easily.
+           * Inline editing
+           * Support for ROWSPAN and COLSPAN on TH elements.
+           * Support secondary "hidden" sorting (e.g., maintain alphabetical sort when
+             sorting on other criteria).
+           * Extensibility via widget system.
+           * Cross-browser: IE 6.0+, FF 2+, Safari 2.0+, Opera 9.0+, Chrome 5.0+.
+
+    """
+    ).splitlines(keepends=True)
+
+    diagnostics = line_linter(lines)
+    assert len(diagnostics) == 1
+
+    issue = diagnostics[0]
+
+    msg = (
+        "The Multi-Arch field name was used multiple times in this stanza."
+        " Please ensure the field is only used once per stanza. Note that Multi-Arch and"
+        " X[BCS]-Multi-Arch are considered the same field."
+    )
+    assert issue.message == msg
+    assert f"{issue.range}" == "27:0-27:10"
+    assert issue.severity == DiagnosticSeverity.Error