Lua: vim.validate()

We often want to do type checking of public function arguments.

- test: Rename utility_function_spec.lua to vim_spec.lua
- .luacov: Map lua module names

1 files changed, 53 insertions, 0 deletions

diff --git a/test/functional/lua/utility_functions_spec.lua b/test/functional/lua/vim_spec.lua
index 7dc97ee5af..cb1f027623 100644
--- a/test/functional/lua/utility_functions_spec.lua
+++ b/test/functional/lua/vim_spec.lua
@@ -402,4 +402,57 @@ describe('lua stdlib', function()
     feed('<cr>')
     eq({3, NIL}, meths.get_var('yy'))
   end)
+
+  it('vim.validate', function()
+    eq(NIL, exec_lua("vim.validate({ arg1={ {}, 'table' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ {}, 't' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ nil, 't', true }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ { foo='foo' }, 't' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ { 'foo' }, 't' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ 'foo', 'string' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ 'foo', 's' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ '', 's' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ nil, 's', true }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ 1, 'number' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ 1, 'n' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ 0, 'n' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ 0.1, 'n' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ nil, 'n', true }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ true, 'boolean' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ true, 'b' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ false, 'b' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ nil, 'b', true }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ function()end, 'function' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ function()end, 'f' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ nil, 'f', true }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ nil, 'nil' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ nil, 'nil', true }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ coroutine.create(function()end), 'thread' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ nil, 'thread', true }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ {}, 't' } }, { arg2={ 'foo', 's' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ {}, 't' }, arg2={ 'foo', 's' }})"))
+    eq(NIL, exec_lua("vim.validate({ arg1={ 2, function(a) return (a % 2) == 0  end, 'even number' }})"))
+
+    eq("Error executing lua: .../shared.lua: arg1: expected table, got number", pcall_err(exec_lua, "vim.validate({ arg1={ 1, 't' }})"))
+    eq("Error executing lua: .../shared.lua: arg2: expected string, got number", pcall_err(exec_lua, "vim.validate({ arg1={ {}, 't' },  arg2={ 1, 's' }})"))
+    eq("Error executing lua: .../shared.lua: arg2: expected string, got nil", pcall_err(exec_lua, "vim.validate({ arg1={ {}, 't' },  arg2={ nil, 's' }})"))
+    eq("Error executing lua: .../shared.lua: arg2: expected string, got nil", pcall_err(exec_lua, "vim.validate({ arg1={ {}, 't' }, arg2={ nil, 's' }})"))
+    eq("Error executing lua: .../shared.lua: arg1: expected even number, got 3", pcall_err(exec_lua, "vim.validate({ arg1={ 3, function(a) return a == 1 end, 'even number' }})"))
+  end)
+
+  it('vim.is_callable', function()
+    eq(true, exec_lua("return vim.is_callable(function()end)"))
+    eq(true, exec_lua([[
+      local meta = { __call = function()end }
+      local function new_callable()
+        return setmetatable({}, meta)
+      end
+      local callable = new_callable()
+      return vim.is_callable(callable)
+    ]]))
+
+    eq(false, exec_lua("return vim.is_callable(1)"))
+    eq(false, exec_lua("return vim.is_callable('foo')"))
+    eq(false, exec_lua("return vim.is_callable({})"))
+  end)
 end)