fix: restore x/X/D as modal debug keys, add quit_exits_mode config, track mapped keys exactly

tests/test_config.lua

@@ -4,9 +4,11 @@ local config = require("tiny-debugger.config")
 -- defaults unchanged after empty merge
 local opts = config.merge({})
 assert_eq(opts.keys.continue, "c", "default continue key")
+assert_eq(opts.keys.breakpoint, "x", "default modal breakpoint key")
 assert_eq(opts.global_keys.toggle, "<leader>dd", "default toggle key")
-assert_eq(opts.global_keys.breakpoint, "<leader>dx", "default breakpoint key")
+assert_eq(opts.global_keys.breakpoint, "<leader>dx", "default global breakpoint key")
 assert_eq(opts.help_on_enter, true, "default help_on_enter")
+assert_eq(opts.quit_exits_mode, true, "default quit_exits_mode")
 
 -- partial key override
 opts = config.merge({ keys = { continue = "g" } })
@@ -22,9 +24,9 @@ opts = config.merge({ global_keys = { toggle = "<leader>D" } })
 assert_eq(opts.global_keys.toggle, "<leader>D", "overridden toggle key")
 assert_eq(opts.global_keys.breakpoint, "<leader>dx", "preserved breakpoint key")
 
--- disable a global key
-opts = config.merge({ global_keys = { breakpoint = false } })
-assert_eq(opts.global_keys.breakpoint, false, "disabled breakpoint key")
+-- quit_exits_mode override
+opts = config.merge({ quit_exits_mode = false })
+assert_eq(opts.quit_exits_mode, false, "overridden quit_exits_mode")
 
 -- merge doesn't mutate defaults
 config.merge({ keys = { continue = "z" } })

tests/test_mode.lua

@@ -15,8 +15,8 @@ assert_eq(td.active(), false, "starts inactive")
 td.toggle()
 assert_eq(td.active(), true, "active after toggle")
 
--- keymaps are set
-for _, key in ipairs({ "c", "s", "d", "r", "q" }) do
+-- all modal keymaps are set (including breakpoint keys)
+for _, key in ipairs({ "c", "s", "d", "r", "q", "x", "X", "D" }) do
   assert_eq(has_buf_map(key), true, key .. " key mapped")
 end
 
@@ -24,9 +24,21 @@ end
 td.toggle()
 assert_eq(td.active(), false, "inactive after second toggle")
 
--- keymaps are removed
-for _, key in ipairs({ "c", "s", "d", "r", "q" }) do
+-- all modal keymaps are removed
+for _, key in ipairs({ "c", "s", "d", "r", "q", "x", "X", "D" }) do
   assert_eq(has_buf_map(key), false, key .. " key removed")
 end
 
+-- double exit is safe
+td.toggle() -- enter
+td.toggle() -- exit
+td.toggle() -- enter
+td.toggle() -- exit
+assert_eq(td.active(), false, "stable after multiple toggles")
+
+-- verify no leaked keymaps after rapid toggling
+for _, key in ipairs({ "c", "s", "d", "r", "q", "x", "X", "D" }) do
+  assert_eq(has_buf_map(key), false, key .. " clean after rapid toggle")
+end
+
 print("ALL MODE TESTS PASSED")