1 files changed, 88 insertions, 0 deletions
diff --git a/tests/lsp_tests/test_lsp_dctrl.py b/tests/lsp_tests/test_lsp_dctrl.py
index d258e8f..122b929 100644
--- a/tests/lsp_tests/test_lsp_dctrl.py
+++ b/tests/lsp_tests/test_lsp_dctrl.py
@@ -70,3 +70,91 @@ def test_dctrl_hover_doc_field(ls: "LanguageServer") -> None:
     )
     assert hover_doc is not None and isinstance(hover_doc.contents, MarkupContent)
     assert "Determines which architecture" in hover_doc.contents.value
+
+
+def test_dctrl_hover_doc_synopsis(ls: "LanguageServer") -> None:
+    dctrl_uri = "file:///nowhere/debian/control"
+    cursor_pos = put_doc_with_cursor(
+        ls,
+        dctrl_uri,
+        "debian/control",
+        textwrap.dedent(
+            """\
+        Source: foo
+
+        Package: foo
+        Architecture: any
+        Description: super charged<CURSOR> tool with batteries included
+"""
+        ),
+    )
+
+    hover_doc = _debian_control_hover(
+        ls,
+        HoverParams(TextDocumentIdentifier(dctrl_uri), cursor_pos),
+    )
+    assert hover_doc is not None and isinstance(hover_doc.contents, MarkupContent)
+    assert hover_doc.contents.value.startswith("# Package synopsis")
+    assert "super charged tool with batteries included" in hover_doc.contents.value
+
+
+def test_dctrl_hover_doc_substvars(ls: "LanguageServer") -> None:
+    dctrl_uri = "file:///nowhere/debian/control"
+    matching_cases = [
+        "bar (= <CURSOR>${binary:Version})",
+        "bar (= $<CURSOR>{binary:Version})",
+        "bar (= ${binary:Version<CURSOR>})",
+    ]
+    for variant in matching_cases:
+        cursor_pos = put_doc_with_cursor(
+            ls,
+            dctrl_uri,
+            "debian/control",
+            textwrap.dedent(
+                f"""\
+            Source: foo
+
+            Package: foo
+            Architecture: any
+            Depends: bar (= {variant})
+            Description: super charged tool with batteries included
+    """
+            ),
+        )
+
+        hover_doc = _debian_control_hover(
+            ls,
+            HoverParams(TextDocumentIdentifier(dctrl_uri), cursor_pos),
+        )
+        assert hover_doc is not None and isinstance(hover_doc.contents, MarkupContent)
+        assert hover_doc.contents.value.startswith("# Substvar `${binary:Version}`")
+
+    non_matching_cases = [
+        "bar (=<CURSOR> ${binary:Version})",
+        "bar (= ${binary:Version}<CURSOR>)",
+    ]
+    for variant in non_matching_cases:
+        cursor_pos = put_doc_with_cursor(
+            ls,
+            dctrl_uri,
+            "debian/control",
+            textwrap.dedent(
+                f"""\
+            Source: foo
+
+            Package: foo
+            Architecture: any
+            Depends: bar (= {variant})
+            Description: super charged tool with batteries included
+    """
+            ),
+        )
+
+        hover_doc = _debian_control_hover(
+            ls,
+            HoverParams(TextDocumentIdentifier(dctrl_uri), cursor_pos),
+        )
+        provided_doc = ""
+        if hover_doc is not None and isinstance(hover_doc.contents, MarkupContent):
+            provided_doc = hover_doc.contents.value
+        assert not provided_doc.startswith("# Substvar `${binary:Version}`")