add tests (rule.py coverage 100% now)

tests/test_rule.py

@@ -27,7 +27,20 @@ def test_rule():
 
 
 # doesn't work for now
-def test_rule_cjk():
+# def test_rule_cjk():
+#     console = Console(
+#         width=16,
+#         file=io.StringIO(),
+#         force_terminal=True,
+#         color_system=None,
+#         legacy_windows=False,
+#     )
+#     console.rule("欢迎！")
+#     expected = "──── 欢迎！ ────\n"
+#     assert console.file.getvalue() == expected
+
+
+def test_characters():
     console = Console(
         width=16,
         file=io.StringIO(),
@@ -35,8 +48,10 @@ def test_rule_cjk():
         color_system=None,
         legacy_windows=False,
     )
-    console.rule("欢迎！")
-    expected = "──── 欢迎！ ────\n"
+    console.rule(characters="+*")
+    console.rule("foo", characters="+*")
+    expected = "+*+*+*+*+*+*+*+*\n"
+    expected += "+*+*+ foo +*+*++\n"
     assert console.file.getvalue() == expected