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(local test {})
(fn eq-fn []
"Returns recursive equality function.
This function is able to compare tables of any depth, even if one of
the tables uses tables as keys."
`(fn eq# [left# right#]
(if (= left# right#)
true
(and (= (type left#) :table) (= (type right#) :table))
(let [oldmeta# (getmetatable right#)]
;; In case if we'll get something like
;; (eq {[1 2 3] {:a [1 2 3]}} {[1 2 3] {:a [1 2 3]}})
;; we have to do even deeper search
(setmetatable right# {:__index (fn [tbl# key#]
(var res# nil)
(each [k# v# (pairs tbl#)]
(when (eq# k# key#)
(set res# v#)
(lua :break)))
res#)})
(var [res# count-a# count-b#] [true 0 0])
(each [k# v# (pairs left#)]
(set res# (eq# v# (. right# k#)))
(set count-a# (+ count-a# 1))
(when (not res#) (lua :break)))
(when res#
(each [_# _# (pairs right#)]
(set count-b# (+ count-b# 1)))
(set res# (= count-a# count-b#)))
(setmetatable right# oldmeta#)
res#)
false)))
(fn test.assert-eq
[expr1 expr2 msg]
"Like `assert`, except compares results of `expr1` and `expr2` for equality.
Generates formatted message if `msg` is not set to other message.
# Example
Compare two expressions:
``` fennel
;; (assert-eq 1 (+1 1))
;; => runtime error: equality assertion failed
;; => Left: 1
;; => Right: 3
```
Deep compare values:
``` fennel
;; (assert-eq [1 {[2 3] [4 5 6]}] [1 {[2 3] [4 5]}])
;; => runtime error: equality assertion failed
;; => Left: [1 {[2 3] [4 5 6]}]
;; => Right: [1 {[2 3] [4 5]}]
```"
`(let [left# ,expr1
right# ,expr2
eq# ,(eq-fn)
fennel# (require :fennel)]
(assert (pick-values 1 (pcall #(do eq# left# right#)))
(or ,msg (.. "assertion failed for expression:
(= " ,(view expr1 {:one-line? true}) " " ,(view expr2 {:one-line? true}) ")
Left: " (fennel#.view left# {:one-line? true}) "
Right: " (fennel#.view right# {:one-line? true}) "\n")))))
(fn test.assert-ne
[expr1 expr2 msg]
"Assert for unequality. Like `assert`, except compares results of
`expr1` and `expr2` for equality. Generates formatted message if
`msg` is not set to other message. Same as [`assert-eq`](#assert-eq)."
`(let [left# ,expr1
right# ,expr2
eq# ,(eq-fn)
fennel# (require :fennel)]
(assert (pick-values 1 (pcall #(not (eq# left# right#))))
(or ,msg (.. "assertion failed for expression:
(not= " ,(view expr1 {:one-line? true}) " " ,(view expr2 {:one-line? true}) ")
Left: " (fennel#.view left# {:one-line? true}) "
Right: " (fennel#.view right# {:one-line? true}) "\n")))))
(fn test.assert-is
[expr msg]
"Assert `expr` for truth. Same as inbuilt `assert`, except generates more
verbose message if `msg` is not set.
``` fennel
;; (assert-is (= 1 2 3))
;; => runtime error: assertion failed for (= 1 2 3)
```"
`(assert (pick-values 1 (pcall #(do ,expr)))
(.. "assertion failed: "
(or ,msg ,(view expr {:one-line? true})))))
(fn test.assert-not
[expr msg]
"Assert `expr` for not truth. Generates more verbose message if
`msg` is not set. Works the same as [`assert-is`](#assert-is)."
`(assert (pick-values 1 (pcall #(not ,expr)))
(.. "assertion failed: "
(or ,msg ,(view expr {:one-line? true})))))
(fn test.deftest
[name ...]
"Simple way of grouping tests with `name`."
`(do ,...))
(fn test.testing
[description ...]
"Print test `description` and run it."
`(do (io.stdout:write (.. "testing: " ,description "\n"))
,...))
(doto test
(tset :_DOC_ORDER #[:deftest :testing
:assert-eq :assert-ne
:assert-is :assert-not]))
|