429 lines
14 KiB
Scheme
429 lines
14 KiB
Scheme
(import (fmt fmt)
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(thin-xml)
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(srfi s8 receive)
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(only (srfi s1 lists) drop-while))
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;;;--------------------------------------------------------------------
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;;; FIXME: there must be an equivalent of this in srfi 1
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(define (intersperse sep xs)
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(cond
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((null? xs) '())
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((null? (cdr xs)) xs)
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(else (cons (car xs)
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(cons sep
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(intersperse sep (cdr xs)))))))
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(define (vector-sort-by cmp key-fn v)
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(define (compare x y)
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(cmp (key-fn x) (key-fn y)))
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(vector-sort compare v))
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(define (chomp line)
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(list->string
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(reverse
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(drop-while char-whitespace?
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(reverse (string->list line))))))
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(define info-lines '())
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(define (info . args)
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(set! info-lines (cons (apply fmt #f args)
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info-lines)))
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;;;--------------------------------------------------------------------
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(define temp-file
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(let ((counter 0))
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(lambda ()
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(let loop ()
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(let ((path (fmt #f (cat (dsp "/tmp/thinp-functional-tests-")
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(pad-char #\0 (pad/left 4 (num counter)))))))
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(set! counter (+ counter 1))
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(if (file-exists? path) (loop) path))))))
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;; Creates a temporary file with the specified contents.
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(define (temp-file-containing contents)
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(let ((path (temp-file)))
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(with-output-to-file path (lambda () (put-string (current-output-port) contents)))
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path))
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(define (slurp-file path)
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(define (slurp)
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(let ((output (get-string-all (current-input-port))))
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(if (eof-object? output)
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output
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(chomp output))))
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(with-input-from-file path slurp))
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(define (temp-thin-xml)
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(temp-file-containing (fmt #f (generate-xml 10 1000))))
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;;;--------------------------------------------------------------------
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;;; Run a sub process and capture it's output.
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;;; Ideally we'd use open-process-ports, but that loses us the exit code which
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;;; we need for testing. So we use system, and redirect stderr and stdout to
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;;; temporary files, and subsequently read them in. Messy, but fine for tests.
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(define (build-command-line cmd-and-args)
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(apply fmt #f (map dsp (intersperse " " cmd-and-args))))
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(define (run . cmd-and-args)
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(let ((stdout-file (temp-file))
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(stderr-file (temp-file)))
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(let ((cmd (fmt #f
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(dsp (build-command-line cmd-and-args))
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(dsp " > ")
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(dsp stdout-file)
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(dsp " 2> ")
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(dsp stderr-file))))
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(info (dsp "cmd: ") (dsp cmd))
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(let ((exit-code (system cmd)))
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(values exit-code
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(slurp-file stdout-file)
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(slurp-file stderr-file))))))
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(define (run-with-exit-code pred cmd-and-args)
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(receive (exit-code stdout stderr) (apply run cmd-and-args)
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(if (pred exit-code)
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(values stdout stderr)
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(begin
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(info (fmt #f (dsp "stdout: ") stdout))
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(info (fmt #f (dsp "stderr: ") stderr))
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(fail (fmt #f (dsp "unexpected exit code (")
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(num exit-code)
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(dsp ")")))))))
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(define (run-ok . cmd-and-args)
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(run-with-exit-code zero? cmd-and-args))
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(define (run-fail . cmd-and-args)
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(define (not-zero? x) (not (zero? x)))
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(run-with-exit-code not-zero? cmd-and-args))
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;;;--------------------------------------------------------------------
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(define-record-type scenario (fields desc thunk))
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(define scenarios (make-eq-hashtable))
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(define (add-scenario sym s)
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(hashtable-set! scenarios sym s))
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(define (list-scenarios)
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(vector->list
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(vector-sort-by string<? symbol->string (hashtable-keys scenarios))))
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(define (describe-scenarios ss)
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(define (describe sym)
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(fmt #t
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(columnar (dsp sym)
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(justify (scenario-desc (hashtable-ref scenarios sym #f))))
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nl))
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(for-each describe ss))
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(define-syntax scenario
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(syntax-rules ()
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((_ sym desc body ...) (add-scenario 'sym
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(make-scenario desc
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(lambda ()
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body ...))))))
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(define (fail msg)
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(raise (condition
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(make-error)
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(make-message-condition msg))))
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(define (run-scenario sym)
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(let ((s (hashtable-ref scenarios sym #f)))
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(display sym)
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(display " ... ")
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((scenario-thunk s))
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(display "pass")
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(newline)))
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(define (run-scenarios ss)
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(for-each run-scenario ss))
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;;;--------------------------------------------------------------------
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;; FIXME: don't hard code this
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(define tools-version "0.7.0-rc6")
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(define (tool-name sym)
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(define (to-underscore c)
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(if (eq? #\- c) #\_ c))
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(list->string (map to-underscore (string->list (symbol->string sym)))))
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(define-syntax define-tool
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(syntax-rules ()
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((_ tool-sym) (define (tool-sym . flags)
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(apply run-ok (tool-name 'tool-sym) flags)))))
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;(define (thin-check . flags)
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;(apply run-ok "thin_check" flags))
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(define-tool thin-check)
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(define-tool thin-delta)
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(define-tool thin-dump)
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(define-tool thin-restore)
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(define-tool thin-rmap)
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(define (assert-equal str1 str2)
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(unless (equal? str1 str2)
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(fail (fmt #f (dsp "values differ: ")
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(wrt str1)
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(dsp ", ")
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(wrt str2)))))
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(define (assert-eof obj)
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(unless (eof-object? obj)
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(fail (fmt #f (dsp "object is not an #!eof: ") (dsp obj)))))
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(define (starts-with prefix str)
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(and (>= (string-length str) (string-length prefix))
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(equal? (substring str 0 (string-length prefix))
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prefix)))
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(define (assert-starts-with prefix str)
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(unless (starts-with prefix str)
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(fail (fmt #f (dsp "string should begin with: ")
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(wrt prefix)
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(dsp ", ")
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(wrt str)))))
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(define (current-metadata)
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"metadata.bin")
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(define (%with-valid-metadata thunk)
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(let ((xml-file (temp-file-containing (fmt #f (generate-xml 10 1000)))))
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(run-ok "thin_restore" "-i" xml-file "-o" (current-metadata))
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(thunk)))
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(define-syntax with-valid-metadata
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(syntax-rules ()
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((_ body ...) (%with-valid-metadata (lambda () body ...)))))
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;;; It would be nice if the metadata was at least similar to valid data.
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(define (%with-corrupt-metadata thunk)
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(run-ok "dd if=/dev/zero" (fmt #f "of=" (current-metadata)) "bs=64M count=1")
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(thunk))
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(define-syntax with-corrupt-metadata
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(syntax-rules ()
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((_ body ...) (%with-corrupt-metadata (lambda () body ...)))))
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;;;-----------------------------------------------------------
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;;; thin_check scenarios
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;;;-----------------------------------------------------------
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(define thin-check-help
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"Usage: thin_check [options] {device|file}
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Options:
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{-q|--quiet}
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{-h|--help}
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{-V|--version}
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{--clear-needs-check-flag}
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{--ignore-non-fatal-errors}
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{--skip-mappings}
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{--super-block-only}")
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(scenario thin-check-v
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"thin_check -V"
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(receive (stdout _) (thin-check "-V")
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(assert-equal tools-version stdout)))
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(scenario thin-check-version
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"thin_check --version"
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(receive (stdout _) (thin-check "--version")
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(assert-equal tools-version stdout)))
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(scenario thin-check-h
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"print help (-h)"
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(receive (stdout _) (thin-check "-h")
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(assert-equal thin-check-help stdout)))
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(scenario thin-check-help
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"print help (--help)"
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(receive (stdout _) (thin-check "--help")
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(assert-equal thin-check-help stdout)))
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(scenario thin-check-bad-option
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"Unrecognised option should cause failure"
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(run-fail "thin_check --hedgehogs-only"))
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(scenario thin-check-superblock-only-valid
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"--super-block-only check passes on valid metadata"
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(with-valid-metadata
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(thin-check "--super-block-only" (current-metadata))))
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(scenario thin-check-superblock-only-invalid
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"--super-block-only check fails with corrupt metadata"
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(with-corrupt-metadata
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(run-fail "thin_check --super-block-only" (current-metadata))))
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(scenario thin-check-skip-mappings-valid
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"--skip-mappings check passes on valid metadata"
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(with-valid-metadata
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(thin-check "--skip-mappings" (current-metadata))))
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(scenario thin-check-ignore-non-fatal-errors
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"--ignore-non-fatal-errors check passes on valid metadata"
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(with-valid-metadata
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(thin-check "--ignore-non-fatal-errors" (current-metadata))))
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(scenario thin-check-quiet
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"--quiet should give no output"
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(with-valid-metadata
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(receive (stdout stderr) (thin-check "--quiet" (current-metadata))
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(assert-eof stdout)
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(assert-eof stderr))))
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(scenario thin-check-clear-needs-check-flag
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"Accepts --clear-needs-check-flag"
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(with-valid-metadata
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(thin-check "--clear-needs-check-flag" (current-metadata))))
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;;;-----------------------------------------------------------
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;;; thin_restore scenarios
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;;;-----------------------------------------------------------
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(define thin-restore-help
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"Usage: thin_restore [options]
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Options:
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{-h|--help}
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{-i|--input} <input xml file>
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{-o|--output} <output device or file>
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{-q|--quiet}
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{-V|--version}")
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(scenario thin-restore-print-version-v
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"print help (-V)"
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(receive (stdout _) (thin-restore "-V")
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(assert-equal tools-version stdout)))
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(scenario thin-restore-print-version-long
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"print help (--version)"
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(receive (stdout _) (thin-restore "--version")
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(assert-equal tools-version stdout)))
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(scenario thin-restore-h
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"print help (-h)"
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(receive (stdout _) (thin-restore "-h")
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(assert-equal thin-restore-help stdout)))
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(scenario thin-restore-help
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"print help (-h)"
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(receive (stdout _) (thin-restore "--help")
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(assert-equal thin-restore-help stdout)))
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(scenario thin-restore-no-input-file
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"forget to specify an input file"
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(receive (_ stderr) (run-fail "thin_restore" "-o" (current-metadata))
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(assert-starts-with "No input file provided." stderr)))
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(scenario thin-restore-missing-input-file
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"the input file can't be found"
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(receive (_ stderr) (run-fail "thin_restore -i no-such-file -o" (current-metadata))
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(assert-starts-with "Couldn't stat file" stderr)))
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(scenario thin-restore-missing-output-file
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"the input file can't be found"
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(receive (_ stderr) (run-fail "thin_restore -i no-such-file -o" (current-metadata))
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(assert-starts-with "Couldn't stat file" stderr)))
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(define thin-restore-outfile-too-small-text
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"Output file too small.
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The output file should either be a block device,
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or an existing file. The file needs to be large
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enough to hold the metadata.")
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(scenario thin-restore-tiny-output-file
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"Fails if the output file is too small."
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(let ((outfile (temp-file))
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(xml-file (temp-file-containing (fmt #f (generate-xml 10 1000)))))
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(run-ok "dd if=/dev/zero" (fmt #f (dsp "of=") (dsp outfile)) "bs=4k count=1")
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(receive (_ stderr) (run-fail "thin_restore" "-i" xml-file "-o" outfile)
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(assert-starts-with thin-restore-outfile-too-small-text stderr))))
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(scenario thin-restore-q
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"thin_restore accepts -q"
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(receive (stdout _) (thin-restore "-i" (temp-thin-xml) "-o" (current-metadata) "-q")
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(assert-eof stdout)))
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(scenario thin-restore-quiet
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"thin_restore accepts --quiet"
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(receive (stdout _) (thin-restore "-i" (temp-thin-xml) "-o" (current-metadata) "--quiet")
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(assert-eof stdout)))
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(scenario thin-dump-restore-is-noop
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"thin_dump followed by thin_restore is a noop."
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(with-valid-metadata
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(receive (d1-stdout _) (thin-dump (current-metadata))
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(thin-restore "-i" (temp-file-containing d1-stdout) "-o" (current-metadata))
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(receive (d2-stdout _) (thin-dump (current-metadata))
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(assert-equal d1-stdout d2-stdout)))))
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;;;-----------------------------------------------------------
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;;; thin_rmap scenarios
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;;;-----------------------------------------------------------
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(scenario thin-rmap-v
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"thin_rmap accepts -V"
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(receive (stdout _) (thin-rmap "-V")
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(assert-equal tools-version stdout)))
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(scenario thin-rmap-version
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"thin_rmap accepts --version"
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(receive (stdout _) (thin-rmap "--version")
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(assert-equal tools-version stdout)))
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(define thin-rmap-help
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"Usage: thin_rmap [options] {device|file}
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Options:
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{-h|--help}
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{-V|--version}
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{--region <block range>}*
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Where:
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<block range> is of the form <begin>..<one-past-the-end>
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for example 5..45 denotes blocks 5 to 44 inclusive, but not block 45")
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(scenario thin-rmap-h
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"thin_rmap accepts -h"
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(receive (stdout _) (thin-rmap "-h")
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(assert-equal thin-rmap-help stdout)))
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(scenario thin-rmap-help
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"thin_rmap accepts --help"
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(receive (stdout _) (thin-rmap "--help")
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(assert-equal thin-rmap-help stdout)))
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(scenario thin-rmap-unrecognised-flag
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"thin_rmap complains with bad flags."
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(run-fail "thin_rmap --unleash-the-hedgehogs"))
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(scenario thin-rmap-valid-region-format-should-pass
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"thin_rmap with a valid region format should pass."
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(with-valid-metadata
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(thin-rmap "--region 23..7890" (current-metadata))))
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(scenario thin-rmap-invalid-region-should-fail
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"thin_rmap with an invalid region format should fail."
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(for-each (lambda (pattern)
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(with-valid-metadata
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(run-fail "thin_rmap --region" pattern (current-metadata))))
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'("23,7890" "23..six" "found..7890" "89..88" "89..89" "89.." "" "89...99")))
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(scenario thin-rmap-multiple-regions-should-pass
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"thin_rmap should handle multiple regions."
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(with-valid-metadata
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(thin-rmap "--region 1..23 --region 45..78" (current-metadata))))
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;;;--------------------------------------------------------------------
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