feat: add testing via GitHub Actions

.github/workflows/test.yml

@@ -0,0 +1,26 @@
+name: test
+
+on: [push]
+
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        luaVersion: ["5.1", "5.2", "5.3", "5.4", "luajit"]
+        os:
+          - ubuntu-latest
+          - macos-latest
+    runs-on: ${{ matrix.os }}
+
+    name: split test (using lua ${{ matrix.luaVersion }} on ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@master
+    - uses: leafo/gh-actions-lua@v9
+    - uses: leafo/gh-actions-luarocks@v4
+      with:
+        luaVersion: ${{ matrix.luaVersion }}
+    - name: test
+      run: |
+        cd test
+        bash runner.sh

test/runner.sh

@@ -1,5 +1,5 @@
 for test in test-*.lua
 do
-	lua -lluacov "$test"
+	lua "$test"
 	[ $? -eq 0 ] || exit $?
 done

test/tapered.lua

@@ -0,0 +1,189 @@
+-- Helper variables and functions
+local get_info = debug.getinfo
+local pcall = pcall
+local slice = string.sub
+local sprintf = string.format
+local str_find = string.find
+local tonumber = tonumber
+-- Lua 5.3 moved unpack to table.unpack
+local unpack = unpack or table.unpack -- luacheck: compat
+local write = io.write
+local rawget = rawget
+local getmetatable = getmetatable
+local exit = os.exit
+
+---- Helper methods
+
+--- C-like printf method
+local printf = function(fmt, ...)
+  write(sprintf(fmt, ...))
+end
+
+--- Compare potentially complex tables or objects
+--
+-- Ideas here are taken from [Penlight][p], [Underscore][u], [cwtest][cw], and
+-- [luassert][l].
+-- [p]: https://github.com/stevedonovan/Penlight
+-- [u]: https://github.com/mirven/underscore.lua
+-- [cw]: https://github.com/catwell/cwtest
+-- [l]: https://github.com/Olivine-Labs/luassert
+--
+-- Predeclare both function names
+local keyvaluesame
+local deepsame
+--
+--- keyvaluesame(table, table) => true or false
+-- Helper method to compare all the keys and values of a table
+keyvaluesame = function (t1, t2)
+  for k1, v1 in pairs(t1) do
+    local v2 = t2[k1]
+    if v2 == nil or not deepsame(v1, v2) then return false end
+  end
+
+  -- Check for any keys present in t2 but not t1
+  for k2, _ in pairs(t2) do
+    if t1[k2] == nil then return false end
+  end
+
+  return true
+end
+--
+--- deepsame(item, item) => true or false
+-- Compare two items of any type for identity
+deepsame = function (t1, t2)
+  local ty1, ty2 = type(t1), type(t2)
+  if ty1 ~= ty2 then return false end
+  if ty1 ~= 'table' then return t1 == t2 end
+
+  -- If ._eq is found, use == and end quickly.
+  -- As of Lua 5.3 == only cares if **one** of the two items has a __eq
+  -- metamethod. Penlight, underscore and cwtest take the same approach,
+  -- so I will as well.
+  local eq = rawget(getmetatable(t1) or {}, '__eq')
+  if (type(eq) == 'function') then
+    return not not eq(t1, t2)
+  else
+    return keyvaluesame(t1, t2)
+  end
+end
+
+---- tapered test suite
+
+local exit_status = 0
+local test_count = 0
+local debug_level = 3
+
+-- All other tests are defined in terms of this primitive, which is
+-- kept private.
+local _test = function (exp, msg)
+  test_count = test_count + 1
+
+  if msg then
+    msg = sprintf(" - %s", msg)
+  else
+    msg = ''
+  end
+
+  if exp then
+    printf("ok %s%s\n", test_count, msg)
+  else
+    exit_status = 1 + exit_status
+    printf("not ok %s%s\n", test_count, msg)
+    local info = get_info(debug_level)
+    printf("# Trouble in %s around line %s\n",
+           slice(info.source, 2), info.currentline)
+  end
+end
+
+local ok = function (expression, msg)
+  _test(expression, msg)
+end
+
+local nok = function (expression, msg)
+  _test(not expression, msg)
+end
+
+local is = function (actual, expected, msg)
+  _test(actual == expected, msg)
+end
+
+local isnt = function (actual, expected, msg)
+  _test(actual ~= expected, msg)
+end
+
+local same = function (actual, expected, msg)
+  _test(deepsame(actual, expected), msg)
+end
+
+local like = function (str, pattern, msg)
+  _test(str_find(str, pattern), msg)
+end
+
+local unlike = function (str, pattern, msg)
+  _test(not str_find(str, pattern), msg)
+end
+
+local pass = function (msg)
+  _test(true, msg)
+end
+
+local fail = function (msg)
+  _test(false, msg)
+end
+
+local boom = function (func, args, msg)
+  local err, errmsg
+  err, errmsg = pcall(func, unpack(args))
+  _test(not err, msg)
+  if not err and type(errmsg) == 'string' then
+    printf('# Got this error: "%s"\n', errmsg)
+  end
+end
+
+local done = function (n)
+  local expected = tonumber(n)
+  if not expected or test_count == expected then
+    printf('1..%d\n', test_count)
+  elseif expected ~= test_count then
+    exit_status = 1 + exit_status
+    local s
+    if expected == 1 then s = '' else s = 's' end
+    printf("# Bad plan. You planned %d test%s but ran %d\n",
+      expected, s, test_count)
+  end
+  exit(exit_status)
+end
+
+local version = function ()
+  return "2.3.1"
+end
+
+local author = function ()
+  return "Peter Aronoff"
+end
+
+local url = function ()
+  return "https://github.com/telemachus/tapered"
+end
+
+local license = function ()
+  return "BSD 3-Clause"
+end
+
+return {
+  ok = ok,
+  nok = nok,
+  is = is,
+  isnt = isnt,
+  same = same,
+  like = like,
+  unlike = unlike,
+  pass = pass,
+  fail = fail,
+  boom = boom,
+  done = done,
+  version = version,
+  author = author,
+  url = url,
+  license = license
+}