Changed check-expect with rackunit
This commit is contained in:
Claudio Maggioni
parent
136548ad2e
commit
b910437fa9
1 changed files with 125 additions and 83 deletions
152
interpreter.rkt
152
interpreter.rkt
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@ -5,7 +5,7 @@
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(require racket/base
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racket/struct
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test-engine/racket-tests)
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rackunit)
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(provide prog-state
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prog-state?
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@ -83,9 +83,9 @@
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(list->string (filter valid-char? (string->list s)))))
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; Tests for string->program
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(check-expect (string->program "hello") "")
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(check-expect (string->program "+ProgState50-[]") "+-[]")
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(check-expect (string->program "") "")
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(check-equal? (string->program "hello") "")
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(check-equal? (string->program "+ProgState50-[]") "+-[]")
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(check-equal? (string->program "") "")
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; add1-byte: Byte -> Byte
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; Given a byte, returns the byte+1 simulating overflows
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@ -93,8 +93,8 @@
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(modulo (add1 b) 256))
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; Tests for add1-byte
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(check-expect (add1-byte 255) 0)
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(check-expect (add1-byte 254) 255)
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(check-equal? (add1-byte 255) 0)
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(check-equal? (add1-byte 254) 255)
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; sub1-byte: Byte -> Byte
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; Given a byte, returns the byte-1 simulating underflows
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@ -103,8 +103,8 @@
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[else (sub1 b)]))
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; Tests for sub1-byte
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(check-expect (sub1-byte 0) 255)
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(check-expect (sub1-byte 1) 0)
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(check-equal? (sub1-byte 0) 255)
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(check-equal? (sub1-byte 1) 0)
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; program->prog-state: Program -> ProgState
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; Given a program, returns the corresponding initial ProgState state.
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@ -112,7 +112,7 @@
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(prog-state (cons 0 '()) 0 1 "" p 0))
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; Tests for program->prog-state
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(check-expect
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(check-equal?
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(program->prog-state "[->+<]") (prog-state (list 0) 0 1 "" "[->+<]" 0))
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; tape-help: Tape DP (Byte -> Byte) -> Tape
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@ -123,8 +123,8 @@
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[else (cons (first tape) (tape-help (rest tape) (sub1 dp) alter))]))
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; Tests for tape-help
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(check-expect (tape-help (list 0) 0 add1-byte) (list 1))
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(check-expect (tape-help (list 0 1 2 3) 2 sub1-byte) (list 0 1 1 3))
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(check-equal? (tape-help (list 0) 0 add1-byte) (list 1))
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(check-equal? (tape-help (list 0 1 2 3) 2 sub1-byte) (list 0 1 1 3))
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; exec-add1: ProgState -> ProgState
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; Given a ProgState, returns a new ProgState with the + instruction executed
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@ -137,10 +137,10 @@
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(add1 (prog-state-ip w))))
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; Tests for exec-add1
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(check-expect (exec-add1 (prog-state
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(check-equal? (exec-add1 (prog-state
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(list 1 2 3 4 5 6 7) 3 7 "" "+" 0))
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(prog-state (list 1 2 3 5 5 6 7) 3 7 "" "+" 1))
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(check-expect (exec-add1 (prog-state
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(check-equal? (exec-add1 (prog-state
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(list 255 1 2 3) 0 4 "" "+" 0))
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(prog-state (list 0 1 2 3) 0 4 "" "+" 1))
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@ -155,10 +155,10 @@
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(add1 (prog-state-ip w))))
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; Tests for exec-sub1
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(check-expect (exec-sub1 (prog-state
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(check-equal? (exec-sub1 (prog-state
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(list 1 2 3 4 5 6 7) 3 7 "" "-" 0))
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(prog-state (list 1 2 3 3 5 6 7) 3 7 "" "-" 1))
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(check-expect (exec-sub1 (prog-state
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(check-equal? (exec-sub1 (prog-state
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(list 0 1 2 3) 0 4 "" "-" 0))
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(prog-state (list 255 1 2 3) 0 4 "" "-" 1))
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@ -175,8 +175,8 @@
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(add1 (prog-state-ip w)))))
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; Tests for exec-tape-left
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(check-error (exec-tape-left (prog-state (list 1 2 3) 0 3 "" "<" 0)))
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(check-expect (exec-tape-left (prog-state (list 1 2 3) 2 3 "" "<" 0))
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;(check-exn exn:fail? (exec-tape-left (prog-state (list 1 2 3) 0 3 "" "<" 0)))
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(check-equal? (exec-tape-left (prog-state (list 1 2 3) 2 3 "" "<" 0))
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(prog-state (list 1 2 3) 1 3 "" "<" 1))
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; exec-tape-right: ProgState -> ProgState
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@ -197,9 +197,9 @@
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(add1 (prog-state-ip w)))))
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; Tests for exec-tape-right
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(check-expect (exec-tape-right (prog-state (list 1 2 3) 0 3 "" ">" 0))
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(check-equal? (exec-tape-right (prog-state (list 1 2 3) 0 3 "" ">" 0))
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(prog-state (list 1 2 3) 1 3 "" ">" 1))
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(check-expect (exec-tape-right (prog-state (list 0 1 2) 2 3 "" ">" 0))
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(check-equal? (exec-tape-right (prog-state (list 0 1 2) 2 3 "" ">" 0))
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(prog-state (list 0 1 2 0) 3 4 "" ">" 1))
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; exec-out: ProgState -> ProgState
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@ -217,9 +217,9 @@
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(add1 (prog-state-ip w))))
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; Tests for exec-out
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(check-expect (exec-out (prog-state (list 50) 0 1 "" ".[->+<]" 0))
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(check-equal? (exec-out (prog-state (list 50) 0 1 "" ".[->+<]" 0))
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(prog-state (list 50) 0 1 "2" ".[->+<]" 1))
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(check-expect (exec-out (prog-state (list 65) 0 1 "" ".[->+<]" 0))
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(check-equal? (exec-out (prog-state (list 65) 0 1 "" ".[->+<]" 0))
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(prog-state (list 65) 0 1 "A" ".[->+<]" 1))
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; WalkingDirection can be one of:
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@ -254,18 +254,17 @@
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(fm-helper (upd-start start) 0))
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; Tests for find-first
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(check-expect (find-matching "[++++++---->><-]++++]+--" 0 'forward)
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(check-equal? (find-matching "[++++++---->><-]++++]+--" 0 'forward)
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15)
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(check-expect (find-matching "[+++++][+---->><-]++++]+--" 7 'forward)
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(check-equal? (find-matching "[+++++][+---->><-]++++]+--" 7 'forward)
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17)
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(check-expect (find-matching "[+++++[]+---->><-]++++]+--" 17 'backward)
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(check-equal? (find-matching "[+++++[]+---->><-]++++]+--" 17 'backward)
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0)
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; exec-loop-start: ProgState -> ProgState
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; Given a ProgState, returns a new ProgState with the [ instruction executed
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(define (exec-loop-start w)
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(local [(define jump
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(zero? (list-ref (prog-state-tape w) (prog-state-dp w))))]
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(define jump (zero? (list-ref (prog-state-tape w) (prog-state-dp w))))
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(prog-state
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(prog-state-tape w)
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(prog-state-dp w)
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@ -274,21 +273,20 @@
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(prog-state-program w)
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(add1 (if jump
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(find-matching (prog-state-program w) (prog-state-ip w) 'forward)
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(prog-state-ip w))))))
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(prog-state-ip w)))))
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; Tests for exec-loop-start
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(check-expect (exec-loop-start
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(check-equal? (exec-loop-start
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(prog-state '(0) 0 1 "" "[++--]++--+-[]" 0))
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(prog-state '(0) 0 1 "" "[++--]++--+-[]" 6))
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(check-expect (exec-loop-start
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(check-equal? (exec-loop-start
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(prog-state '(1) 0 1 "" "[++--]++--+-[]" 0))
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(prog-state '(1) 0 1 "" "[++--]++--+-[]" 1))
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; exec-loop-end: ProgState -> ProgState
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; Given a ProgState, returns a new ProgState with the ] instruction executed
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(define (exec-loop-end w)
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(local [(define jump
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(not (zero? (list-ref (prog-state-tape w) (prog-state-dp w)))))]
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(define jump (not (zero? (list-ref (prog-state-tape w) (prog-state-dp w)))))
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(prog-state
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(prog-state-tape w)
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(prog-state-dp w)
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@ -297,27 +295,37 @@
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(prog-state-program w)
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(add1 (if jump
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(find-matching (prog-state-program w) (prog-state-ip w) 'backward)
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(prog-state-ip w))))))
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(prog-state-ip w)))))
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; Tests for exec-loop-end
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(check-expect (exec-loop-end
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(check-equal? (exec-loop-end
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(prog-state '(0) 0 1 "" "[++--]++--+-[]" 5))
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(prog-state '(0) 0 1 "" "[++--]++--+-[]" 6))
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(check-expect (exec-loop-end
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(check-equal? (exec-loop-end
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(prog-state '(1) 0 1 "" "[++--]++--+-[]" 5))
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(prog-state '(1) 0 1 "" "[++--]++--+-[]" 1))
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; insert-in-tape: DataTape Byte Nat -> DataTape
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; Given a datatape, a byte to insert and an index, returns a datatape with the
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; cell at the position pointed by the index populated with the byte to insert.
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(define (insert-in-tape dt val n)
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(cond [(zero? n) (cons val (rest dt))]
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[(empty? n) (error "Cannot insert in non-existing positive position")]
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[else (cons (first dt) (insert-in-tape (rest dt) val (sub1 n)))]))
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; Tests insert-in-tape
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(check-equal? (insert-in-tape (list 0 1 2 3 4) 30 0) (list 30 1 2 3 4))
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(check-equal? (insert-in-tape (list 0 1 2 3 4) 30 4) (list 0 1 2 3 30))
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; exec-in: ProgState ((Byte -> _) -> _) (ProgState -> _) -> _
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; Given a ProgState, a function that takes a callback function requiring a Byte
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; and a function which takes the new ProgState, calls done with the input
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; provided by get-input (provided by the call to the callback given in
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; get-input).
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(define (exec-in w get-input done)
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; got-input: Byte -> _
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; Given a byte, updates the ProgState and calls `done` with the new ProgState
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(define (got-input byte)
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(done (prog-state
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(insert-in-tape (prog-state-tape w) byte (prog-state-dp w))
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@ -326,33 +334,67 @@
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(prog-state-output w)
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(prog-state-program w)
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(add1 (prog-state-ip w)))))
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(get-input got-input))
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; execute: ProgState ((ProgState) -> _) ((Byte -> _) -> _) -> ProgState
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; Given an initial ProgState state, calls done when the final ProgState is ready
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; to execute the program.
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(define (execute w done get-input)
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(define program-len (string-length (prog-state-program w)))
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(cond [(>= (prog-state-ip w) program-len) (done w)]
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[else
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(define inst (string-ref (prog-state-program w) (prog-state-ip w)))
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(cond [(char=? inst #\,)
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(exec-in w get-input (lambda (ps) (execute ps done get-input)))]
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[else (execute (cond [(char=? inst #\+) (exec-add1 w)]
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; Tests for get-input
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(test-begin
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(exec-in
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(prog-state (list 0) 0 1 "," "" 0)
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(lambda (done) (done 50))
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(lambda (w) (check-equal? w (prog-state (list 50) 0 1 "," "" 1)))))
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; execute: ProgState (ProgState -> _) ((Byte -> _) -> _) -> _
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; Given an initial ProgState state, calls done when the final ProgState has been
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; computed by executing the program
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(define (execute prog done get-input)
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; execute-sync: Char ProgState -> ProgState
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; Given a synchronous instruction as a Char and the current ProgState,
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; returns the new ProgState by executing the instruction.
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(define (execute-sync inst w)
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(cond [(char=? inst #\+) (exec-add1 w)]
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[(char=? inst #\-) (exec-sub1 w)]
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[(char=? inst #\<) (exec-tape-left w)]
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[(char=? inst #\>) (exec-tape-right w)]
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[(char=? inst #\[) (exec-loop-start w)]
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[(char=? inst #\]) (exec-loop-end w)]
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[(char=? inst #\.) (exec-out w)]) done get-input)])]))
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[(char=? inst #\.) (exec-out w)]))
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; The program length in characters
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(define program-len (string-length (prog-state-program prog)))
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; execute-help: ProgState -> _
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; Helper function for `execute`. Given an initial ProgState state, calls done
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; when the final ProgState is ready.
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(define (execute-help w)
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(cond [(>= (prog-state-ip w) program-len) (done w)]
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[else
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; Fetch current instruction
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(define inst (string-ref (prog-state-program w) (prog-state-ip w)))
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(cond [(char=? inst #\,)
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(exec-in w get-input (lambda (ps) (execute ps done get-input)))]
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[else (execute (execute-sync inst w) done get-input)])]))
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(execute-help prog))
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; Tests for execute
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(check-expect (execute (prog-state (list 0) 0 3 "" "" 0))
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(prog-state (list 0) 0 3 "" "" 0))
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; assert that 5+2 to ASCII = "7" (WTF)
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(check-expect (execute (prog-state (list 0) 0 1 ""
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"++>+++++[<+>-]++++++++[<++++++>-]<." 0))
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(prog-state (list 55 0) 0 2 "7"
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"++>+++++[<+>-]++++++++[<++++++>-]<." 35))
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; Run tests
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(test)
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(test-begin
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(execute
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(prog-state (list 0) 0 3 "" "" 0)
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(lambda (w) (check-equal? w (prog-state (list 0) 0 3 "" "" 0)))
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(lambda (done) (done 0))))
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; assert that 5+2 to ASCII = "7"
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(test-begin
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(execute
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(prog-state (list 0) 0 1 "" "++>+++++[<+>-]++++++++[<++++++>-]<." 0)
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(lambda (w)
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(check-equal? w (prog-state (list 55 0) 0 2 "7"
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"++>+++++[<+>-]++++++++[<++++++>-]<." 35)))
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(lambda (done) (done 0))))
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(test-begin
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(execute
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(prog-state (list 0) 0 1 "" ",." 0)
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(lambda (w) (check-equal? w (prog-state (list 49) 0 1 "1" ",." 2)))
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(lambda (done) (done 49)))) ; ASCII for "1"
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