1 files changed, 49 insertions, 0 deletions
diff --git a/test/functional/vimscript/minmax_functions_spec.lua b/test/functional/vimscript/minmax_functions_spec.lua
new file mode 100644
index 0000000000..91106bef1e
--- /dev/null
+++ b/test/functional/vimscript/minmax_functions_spec.lua
@@ -0,0 +1,49 @@
+local helpers = require('test.functional.helpers')(after_each)
+
+local eq = helpers.eq
+local eval = helpers.eval
+local command = helpers.command
+local clear = helpers.clear
+local funcs = helpers.funcs
+local pcall_err = helpers.pcall_err
+
+before_each(clear)
+for _, func in ipairs({'min', 'max'}) do
+  describe(func .. '()', function()
+    it('gives a single error message when multiple values failed conversions',
+    function()
+      eq('Vim(echo):E745: Using a List as a Number',
+         pcall_err(command, 'echo ' .. func .. '([-5, [], [], [], 5])'))
+      eq('Vim(echo):E745: Using a List as a Number',
+         pcall_err(command, 'echo ' .. func .. '({1:-5, 2:[], 3:[], 4:[], 5:5})'))
+      for errmsg, errinput in pairs({
+        ['Vim(echo):E745: Using a List as a Number'] = '[]',
+        ['Vim(echo):E805: Using a Float as a Number'] = '0.0',
+        ['Vim(echo):E703: Using a Funcref as a Number'] = 'function("tr")',
+        ['Vim(echo):E728: Using a Dictionary as a Number'] = '{}',
+      }) do
+        eq(errmsg, pcall_err(command, 'echo ' .. func .. '([' .. errinput .. '])'))
+        eq(errmsg, pcall_err(command, 'echo ' .. func .. '({1:' .. errinput .. '})'))
+      end
+    end)
+    it('works with arrays/dictionaries with zero items', function()
+      eq(0, funcs[func]({}))
+      eq(0, eval(func .. '({})'))
+    end)
+    it('works with arrays/dictionaries with one item', function()
+      eq(5, funcs[func]({5}))
+      eq(5, funcs[func]({test=5}))
+    end)
+    it('works with NULL arrays/dictionaries', function()
+      eq(0, eval(func .. '(v:_null_list)'))
+      eq(0, eval(func .. '(v:_null_dict)'))
+    end)
+    it('errors out for invalid types', function()
+      for _, errinput in ipairs({'1', 'v:true', 'v:false', 'v:null',
+                                 'function("tr")', '""'}) do
+        eq(('Vim(echo):E712: Argument of %s() must be a List or Dictionary'):format(func),
+           pcall_err(command, 'echo ' .. func .. '(' .. errinput .. ')'))
+      end
+    end)
+  end)
+end