+ LuaMacro

1 files changed, 144 insertions, 0 deletions

diff --git a/Tools/LuaMacro/macro/lib/test.lua b/Tools/LuaMacro/macro/lib/test.lua
new file mode 100644
index 0000000..5fff39e
--- /dev/null
+++ b/Tools/LuaMacro/macro/lib/test.lua
@@ -0,0 +1,144 @@
+--- `assert_` macro library support.
+-- This module may of course be used on its own; `assert_` merely provides
+-- some syntactical sugar for its functionality. It is based on Penlight's
+-- `pl.test` module.
+-- @module macro.libs.test
+
+local test = {}
+
+local _eq,_tostring
+
+-- very much like tablex.deepcompare from Penlight
+function _eq (v1,v2)
+    if type(v1) ~= type(v2) then return false end
+    -- if the value isn't a table, or it has defined the equality operator..
+    local mt = getmetatable(v1)
+    if (mt and mt.__eq) or type(v1) ~= 'table' then
+        return v1 == v2
+    end
+    -- both values are plain tables
+    if v1 == v2 then return true end -- they were the same table...
+    for k1,x1 in pairs(v1) do
+        local x2 = v2[k1]
+        if x2 == nil or not _eq(x1,x2) then return false end
+    end
+    for k2,x2 in pairs(v2) do
+        local x1 = v1[k2]
+        if x1 == nil or not _eq(x1,x2) then return false end
+    end
+    return true
+end
+
+local function keyv (k)
+    if type(k) ~= 'string' then
+        k = '['..k..']'
+    end
+    return k
+end
+
+function _tostring (val)
+    local mt = getmetatable(val)
+    if (mt and mt.__tostring) or type(val) ~= 'table' then
+        if type(val) == 'string' then
+            return '"'..tostring(val)..'"'
+        else
+            return tostring(val)
+        end
+    end
+    -- dump the table; doesn't need to be pretty!
+    local res = {}
+    local function put(s) res[#res+1] = s end
+    put '{'
+    for k,v in pairs(val) do
+        put(keyv(k)..'=')
+        put(_tostring(v))
+        put ','
+    end
+    table.remove(res) -- remove last ','
+    put '}'
+    return table.concat(res)
+end
+
+local function _lt (v1,v2) return v1 < v2 end
+local function _gt (v1,v2) return v1 > v2 end
+local function _match (v1,v2) return v1:match(v2) end
+
+local function _assert (v1,v2,cmp,msg)
+    if not cmp(v1,v2) then
+        print('first:',_tostring(v1))
+        print(msg)
+        print('second:',_tostring(v2))
+        error('assertion failed',3)
+    end
+end
+
+--- assert if parameters are not equal. If the values are tables,
+-- they will be compared by value.
+-- @param v1 given value
+-- @param v2 test value
+function test.assert_eq (v1,v2)
+    _assert(v1,v2,_eq,"is not equal to");
+end
+
+--- assert if first parameter is not less than second.
+-- @param v1 given value
+-- @param v2 test value
+function test.assert_lt (v1,v2)
+    _assert(v1,v2,_lt,"is not less than")
+end
+
+--- assert if first parameter is not greater than second.
+-- @param v1 given value
+-- @param v2 test value
+function test.assert_gt (v1,v2)
+    _assert(v1,v2,_gt,"is not greater than")
+end
+
+--- assert if first parameter string does not match the second.
+-- The condition is `v1:match(v2)`.
+-- @param v1 given value
+-- @param v2 test value
+function test.assert_match (v1,v2)
+    _assert(v1,v2,_match,"does not match")
+end
+
+-- return the error message from a function that raises an error.
+-- Will raise an error if the function did not raise an error.
+-- @param fun the function
+-- @param ... any arguments to the function
+-- @return the error message
+function test.pcall_no(fun,...)
+    local ok,err = pcall(fun,...)
+    if ok then error('expression did not throw error',3) end
+    return err
+end
+
+local tuple = {}
+
+function tuple.__eq (a,b)
+    if a.n ~= b.n then return false end
+    for i=1, a.n do
+        if not _eq(a[i],b[i]) then return false end
+    end
+    return true
+end
+
+function tuple.__tostring (self)
+    local ts = {}
+    for i = 1,self.n do
+        ts[i] = _tostring(self[i])
+    end
+    return '('..table.concat(ts,',')..')'
+end
+
+--- create a tuple capturing multiple return values.
+-- Equality between tuples means that all of their values are equal;
+-- values may be `nil`
+-- @param ... any values
+-- @return a tuple object
+function test.tuple(...)
+    return setmetatable({n=select('#',...),...},tuple)
+end
+
+return test
+