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;;;; coverage.test --- Code coverage. -*- mode: scheme; coding: utf-8; -*-
;;;;
;;;; Copyright (C) 2010, 2011, 2012, 2013, 2014, 2015, 2017 Free Software Foundation, Inc.
;;;;
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
;;;; License as published by the Free Software Foundation; either
;;;; version 3 of the License, or (at your option) any later version.
;;;;
;;;; This library is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;;; Lesser General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this library; if not, write to the Free Software
;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
(define-module (test-coverage)
#:use-module (test-suite lib)
#:use-module (system vm coverage)
#:use-module (system vm vm)
#:use-module (system base compile)
#:use-module (system foreign)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11))
(define-syntax code
(syntax-rules ()
((_ filename snippet)
(let ((input (open-input-string snippet)))
(set-port-filename! input filename)
(read-enable 'positions)
(compile (read input))))))
(define test-procedure
(compile '(lambda (x)
(if (> x 2)
(- x 2)
(+ x 2)))))
(with-test-prefix "instrumented/executed-lines"
(pass-if "instr = exec"
(let ((proc (code "foo.scm" "(lambda (x y) ;; 0
(+ x y)) ;; 1")))
(let-values (((data result)
(with-code-coverage
(lambda () (proc 1 2)))))
(and (coverage-data? data)
(= 3 result)
(let-values (((instr exec)
(instrumented/executed-lines data "foo.scm")))
(and (= 2 instr) (= 2 exec)))))))
(pass-if "instr >= exec"
(let ((proc (code "foo.scm" "(lambda (x y) ;; 0
(if (> x y) ;; 1
(begin ;; 2
(display x) ;; 3
(+ x y)))) ;; 4")))
(let-values (((data result)
(with-code-coverage
(lambda () (proc 1 2)))))
(and (coverage-data? data)
(let-values (((instr exec)
(instrumented/executed-lines data "foo.scm")))
(and (> instr 0) (>= instr exec))))))))
(with-test-prefix "line-execution-counts"
(pass-if "once"
(let ((proc (code "bar.scm" "(lambda (x y) ;; 0
(+ (/ x y) ;; 1
(* x y))) ;; 2")))
(let-values (((data result)
(with-code-coverage
(lambda () (proc 1 2)))))
(let ((counts (line-execution-counts data "bar.scm")))
(and (pair? counts)
(every (lambda (line+count)
(let ((line (car line+count))
(count (cdr line+count)))
(and (>= line 0)
(<= line 2)
(= count 1))))
counts))))))
;; Unhappily, lack of source location on identifiers combined with a
;; block reordering change makes this test fail. The right solution
;; is to fix the compiler, but really it should happen by fixing
;; psyntax to have source location info for identifiers and immediate
;; values.
(expect-fail "several times"
(let ((proc (code "fooz.scm" "(lambda (x) ;; 0
(format #f \"hello\") ;; 1
(let loop ((x x)) ;; 2
(cond ((> x 0) ;; 3
(begin ;; 4
(format #f \"~a\" x)
(loop (1- x)))) ;; 6
((= x 0) #t) ;; 7
((< x 0) 'never))))")))
(let-values (((data result)
(with-code-coverage
(lambda () (proc 77)))))
(let ((counts (line-execution-counts data "fooz.scm")))
(and (pair? counts)
(every (lambda (line+count)
(let ((line (car line+count))
(count (cdr line+count)))
;; The actual line counts for aliasing
;; operations, like the loop header that
;; initializes "x" to "x", are sensitive to
;; whether there is an associated "mov"
;; instruction, or whether the value is left
;; in place. Currently there are no
;; instructions for line 2, but we allow 1 as
;; well.
(case line
((0 1) (= count 1))
((2) (<= 0 count 1))
((3) (= count 78))
((4 5 6) (= count 77))
((7) (= count 1))
((8) (= count 0))
(else #f))))
counts))))))
(pass-if "some"
(let ((proc (code "baz.scm" "(lambda (x y) ;; 0
(if (> x y) ;; 1
(begin ;; 2
(display x) ;; 3
(+ x y)) ;; 4
(+ x y))) ;; 5")))
(let-values (((data result)
(with-code-coverage
(lambda () (proc 1 2)))))
(let ((counts (line-execution-counts data "baz.scm")))
(and (pair? counts)
(every (lambda (line+count)
(let ((line (car line+count))
(count (cdr line+count)))
(case line
((0 1 5) (= count 1))
((2 3) (= count 0))
((4) #t) ;; the start of the `else' branch is
;; attributed to line 4
(else #f))))
counts))))))
;; Same unfortunate caveat as above: block ordering and source
;; locations :(
(expect-fail "one proc hit, one proc unused"
(let ((proc (code "baz.scm" "(letrec ((even? (lambda (x) ;; 0
(or (= x 0) ;; 1
(not (odd? (1- x))))))
(odd? (lambda (x) ;; 3
(not (even? (1- x)))))) ;; 4
even?)")))
(let-values (((data result)
(with-code-coverage
(lambda () (proc 0)))))
(let ((counts (line-execution-counts data "baz.scm")))
(and (pair? counts)
(every (lambda (line+count)
(let ((line (car line+count))
(count (cdr line+count)))
(case line
((0 1) (= count 1))
((2 3 4 5) (= count 0))
(else #f))))
counts))))))
(pass-if "case-lambda"
(let ((proc (code "cl.scm" "(case-lambda ;; 0
((x) (+ x 3)) ;; 1
((x y) (+ x y))) ;; 2")))
(let-values (((data result)
(with-code-coverage
(lambda ()
(+ (proc 1) (proc 2 3))))))
(let ((counts (line-execution-counts data "cl.scm")))
(and (pair? counts)
(lset= equal? '((0 . 2) (1 . 1) (2 . 1)) counts))))))
(pass-if "all code on one line"
;; There are several proc/IP pairs pointing to this source line, yet the hit
;; count for the line should be 1.
(let ((proc (code "one-liner.scm"
"(lambda (x y) (+ x y (* x y) (if (> x y) 1 2) (quotient y x)))")))
(let-values (((data result)
(with-code-coverage
(lambda () (proc 451 1884)))))
(let ((counts (line-execution-counts data "one-liner.scm")))
(equal? counts '((0 . 1)))))))
(pass-if "tail calls"
(let ((proc (code "tail-calls.scm"
"(begin
(define (tail-call-test)
(display \"foo\\n\")
(tail-call-target))
(define (tail-call-target)
(display \"bar\\n\"))
tail-call-test)")))
(let-values (((data result)
(with-code-coverage
(lambda () (with-output-to-string proc)))))
(let ((counts (line-execution-counts data "tail-calls.scm")))
(define (lset-contains? eq? a b)
(lset= eq? b (lset-intersection eq? a b)))
;; Due to top-level binding optimization, the target may be
;; inlined or into the caller. All we can say is that the
;; entry was seen, and the two displays were called.
(lset-contains? equal? counts '((1 . 1) (2 . 1) (6 . 1))))))))
(with-test-prefix "procedure-execution-count"
(pass-if "several times"
(let ((proc (code "foo.scm" "(lambda (x y) x)")))
(let-values (((data result)
(with-code-coverage
(lambda () (+ (proc 1 2) (proc 2 3))))))
(and (coverage-data? data)
(= 3 result)
(= (procedure-execution-count data proc) 2)))))
(pass-if "case-lambda"
(let ((proc (code "foo.scm" "(case-lambda ((x) x) ((x y) (+ x y)))")))
(let-values (((data result)
(with-code-coverage
(lambda ()
(+ (proc 1) (proc 2 3))))))
(and (coverage-data? data)
(= 6 result)
(= (procedure-execution-count data proc) 2)))))
(pass-if "never"
(let ((proc (code "foo.scm" "(lambda (x y) x)")))
(let-values (((data result)
(with-code-coverage
(lambda () (+ 1 2)))))
(and (coverage-data? data)
(= 3 result)
(zero? (procedure-execution-count data proc))))))
(pass-if "applicable struct"
(let* ((<box> (make-struct/no-tail <applicable-struct-vtable> 'pw))
(proc (lambda args (length args)))
(b (make-struct/no-tail <box> proc)))
(let-values (((data result)
(with-code-coverage b)))
(and (coverage-data? data)
(= 0 result)
(= (procedure-execution-count data proc) 1)))))
(pass-if "called from C"
;; The `scm_call_N' functions use the VM returned by `the-vm'. This
;; test makes sure that their calls are traced.
(let ((proc (code "foo.scm" "(lambda (x y) (+ x y))"))
(call (false-if-exception ; can we resolve `scm_call_2'?
(pointer->procedure '*
(dynamic-func "scm_call_2"
(dynamic-link))
'(* * *)))))
(if call
(let-values (((data result)
(with-code-coverage
(lambda ()
(call (make-pointer (object-address proc))
(make-pointer (object-address 1))
(make-pointer (object-address 2)))))))
(and (coverage-data? data)
(= (object-address 3) (pointer-address result))
(= (procedure-execution-count data proc) 1)))
(throw 'unresolved))))
(pass-if "called from eval"
(let-values (((data result)
(with-code-coverage
(lambda ()
(eval '(test-procedure 123) (current-module))))))
(and (coverage-data? data)
(= (test-procedure 123) result)
(= (procedure-execution-count data test-procedure) 1)))))
(with-test-prefix "instrumented-source-files"
(pass-if "source files are listed as expected"
(let ((proc (code "chbouib.scm" "(lambda (x y) x)")))
(let-values (((data result)
(with-code-coverage
(lambda () (proc 1 2)))))
(let ((files (map basename (instrumented-source-files data))))
(and (member "boot-9.scm" files)
(member "chbouib.scm" files)
#t))))))
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