tests/indent: add Lua tests

lua/tests/indent/lua/comment.lua

@@ -0,0 +1,7 @@
+-- some
+-- comment
+
+--[[
+  another
+  comment
+--]]

lua/tests/indent/lua/cond.lua

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+local x = 10
+
+if x > 3 then
+  x = 3
+elseif x < 3 then
+  x = -3
+else
+  if x > 0 then
+    x = 1
+  end
+  x = 0
+end

lua/tests/indent/lua/func.lua

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+function foo(x)
+  local bar = function(a, b, c)
+    return a + b + c
+  end
+  return bar(
+    x,
+    1,
+    2)
+end

lua/tests/indent/lua/loop.lua

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+local x = 1
+
+while x < 10 do
+  x = x + 1
+  break
+end
+
+for i = 1,3 do
+  x = x + i
+end
+
+repeat
+  x = x + 1
+until x > 100

lua/tests/indent/lua/string.lua

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+local s = [[
+a
+  multiline
+    string
+]]

lua/tests/indent/lua/table.lua

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+local a = {
+  x = 1,
+  y = 2,
+  z = {
+    1, 2, 3,
+  },
+  ['hello world'] = {
+    1, 2, 3
+  }
+}

lua/tests/indent/lua_spec.lua

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+local whole_file = require('nvim-treesitter.test_utils').indent_whole_file
+local new_line = require('nvim-treesitter.test_utils').indent_new_line
+local scan_dir = require('plenary.scandir').scan_dir
+
+local opts = {
+  tabstop = 2,
+  shiftwidth = 2,
+  softtabstop = 0,
+  expandtab = true,
+}
+
+describe('indent Lua:', function()
+  describe('whole file:', function()
+    local files = scan_dir('lua/tests/indent/lua');
+    for _, file in ipairs(files) do
+      it(vim.fn.fnamemodify(file, ':t'), function()
+        whole_file(file, opts)
+      end)
+    end
+  end)
+
+  describe('new line:', function()
+    local run = function(file, spec, title)
+      title = title and title or tostring(spec.on_line)
+      it(string.format('%s[%s]', file, title), function()
+        new_line('lua/tests/indent/lua/' .. file, spec, opts)
+      end)
+    end
+
+    run('comment.lua', { on_line = 1, text = 'line', indent = '-- ' })
+    run('comment.lua', { on_line = 5, text = 'multiline', indent = '  ' })
+    run('func.lua', { on_line = 1, text = 'x = x + 1', indent = 2 })
+    run('func.lua', { on_line = 2, text = 'y = y + 1', indent = 4 })
+    run('func.lua', { on_line = 5, text = '3,', indent = 4 })
+    run('string.lua', { on_line = 1, text = 'x', indent = 0 })
+    run('string.lua', { on_line = 2, text = 'x', indent = 0 })
+    run('string.lua', { on_line = 3, text = 'x', indent = 2 })
+    run('string.lua', { on_line = 4, text = 'x', indent = 4 })
+    run('table.lua', { on_line = 1, text = 'b = 0,', indent = 2 })
+    run('table.lua', { on_line = 5, text = '4,', indent = 4 })
+    run('table.lua', { on_line = 7, text = '4,', indent = 4 })
+    run('loop.lua', { on_line = 4, text = 'x = x + 1', indent = 2 })
+    run('cond.lua', { on_line = 5, text = 'x = x + 1', indent = 2 })
+    run('cond.lua', { on_line = 7, text = 'x = x + 1', indent = 2 })
+    run('cond.lua', { on_line = 8, text = 'x = x + 1', indent = 4 })
+  end)
+end)
+