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Write generalized spec generation macro

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This add `gen-spec` which provides a fairly general macro for creating `test.check` specifications for vector instructions.  It takes a string used to generate specification names, a function used to check the state after running the function under test, and a list of keywords indicating types for arguments generated by `test.check` and passed to the check function.

Keywords like `:integer` and `:string` are associated with "simple" generators such as `gen/small-integer` and `gen/string`. The keyword `:vector` is used to generate a vector of items whose type is specified by the `generator` argument to `generator-for-arg-type`. This allows us to loop over all of the supported vector item types in the macro and generate a separate specification for each type.

We moved the `value-type` argument for the `check` functions to the front to simplify passing in the value type arguments, which can vary in number.
This commit is contained in:
Nic McPhee 2020-12-28 15:27:10 -06:00
parent b41c35582a
commit d30f7c195e
1 changed files with 37 additions and 4 deletions
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41
test/propeller/push/instructions/vector_spec.clj
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@ -190,7 +190,7 @@
The order of concatenation is that the top of the stack will be
_second_ in the concatenation, i.e., its elements will come _after_
the elements in the vector one below it in the stack."
[first-vect second-vect value-type]
[value-type first-vect second-vect]
(let [stack-type (keyword (str "vector_" value-type))
start-state (state/push-to-stack
(state/push-to-stack state/empty-state
@ -210,7 +210,7 @@
second-vect# (gen/vector ~generator)]
(check-concat first-vect# second-vect# ~value-type))))))
(concat-spec)
; (concat-spec)
;;; vector/_subvec
@ -229,7 +229,7 @@
the given values on the integer stack.
It then runs the vector/_subvec instruction, and confirms that the
result (on the :vector_<value-type> stack) is the expected value."
[vect start stop value-type]
[value-type vect start stop]
(let [stack-type (keyword (str "vector_" value-type))
start-state (state/push-to-stack
(state/push-to-stack
@ -254,4 +254,37 @@
stop# gen/small-integer]
(check-subvec vect# start# stop# ~value-type))))))
(subvec-spec)
; (subvec-spec)
(defn generator-for-arg-type
[arg-type generator]
(case arg-type
:boolean 'gen/boolean
:integer 'gen/small-integer
:float 'gen/double
:string 'gen/string
; This is for "generic" vectors where the element is provided by
; the `generator` argument.
:vector `(gen/vector ~generator)
:vector_boolean '(gen/vector gen/boolean)
:vector_integer '(gen/vector gen/small-integer)
:vector_float '(gen/vector gen/double)
:vector_string '(gen/vector gen/string)
))
(defmacro gen-specs
[spec-name check-fn & arg-types]
(let [symbol-names (repeatedly (count arg-types) gensym)]
`(do ~@(for [[generator value-type] gen-type-pairs
:let [name (symbol (str spec-name "-spec-" value-type))]]
`(defspec ~name
(prop/for-all
[~@(mapcat
(fn [symbol-name arg-type]
[symbol-name (generator-for-arg-type arg-type generator)])
symbol-names
arg-types) ]
(~check-fn ~value-type ~@symbol-names)))))))
(gen-specs "concat" check-concat :vector :vector)
(gen-specs "subvec" check-subvec :vector :integer :integer)