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407 lines
12 KiB
Plaintext
407 lines
12 KiB
Plaintext
;; Classic programs corpus tests.
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;;
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;; Each program lives in tests/programs/*.st as canonical Smalltalk source.
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;; This file embeds the same source as a string (until a file-read primitive
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;; lands) and runs it via smalltalk-load, then asserts behaviour.
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(set! st-test-pass 0)
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(set! st-test-fail 0)
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(set! st-test-fails (list))
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(define ev (fn (src) (smalltalk-eval src)))
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(define evp (fn (src) (smalltalk-eval-program src)))
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;; ── fibonacci.st (kept in sync with lib/smalltalk/tests/programs/fibonacci.st) ──
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(define
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fib-source
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"Object subclass: #Fibonacci
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instanceVariableNames: 'memo'!
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!Fibonacci methodsFor: 'init'!
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init memo := Array new: 100. ^ self! !
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!Fibonacci methodsFor: 'compute'!
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fib: n
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n < 2 ifTrue: [^ n].
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^ (self fib: n - 1) + (self fib: n - 2)!
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memoFib: n
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| cached |
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cached := memo at: n + 1.
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cached notNil ifTrue: [^ cached].
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cached := n < 2
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ifTrue: [n]
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ifFalse: [(self memoFib: n - 1) + (self memoFib: n - 2)].
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memo at: n + 1 put: cached.
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^ cached! !")
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(st-bootstrap-classes!)
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(smalltalk-load fib-source)
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(st-test "fib(0)" (evp "^ Fibonacci new fib: 0") 0)
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(st-test "fib(1)" (evp "^ Fibonacci new fib: 1") 1)
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(st-test "fib(2)" (evp "^ Fibonacci new fib: 2") 1)
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(st-test "fib(5)" (evp "^ Fibonacci new fib: 5") 5)
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(st-test "fib(10)" (evp "^ Fibonacci new fib: 10") 55)
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(st-test "fib(15)" (evp "^ Fibonacci new fib: 15") 610)
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(st-test "memoFib(20)"
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(evp "| f | f := Fibonacci new init. ^ f memoFib: 20")
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6765)
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(st-test "memoFib(30)"
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(evp "| f | f := Fibonacci new init. ^ f memoFib: 30")
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832040)
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;; Memoisation actually populates the array.
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(st-test "memo cache stores intermediate"
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(evp
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"| f | f := Fibonacci new init.
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f memoFib: 12.
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^ #(0 1 1 2 3 5) , #() , #()")
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(list 0 1 1 2 3 5))
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;; The class is reachable from the bootstrap class table.
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(st-test "Fibonacci class exists in table" (st-class-exists? "Fibonacci") true)
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(st-test "Fibonacci has memo ivar"
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(get (st-class-get "Fibonacci") :ivars)
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(list "memo"))
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;; Method dictionary holds the three methods.
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(st-test "Fibonacci methodDict size"
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(len (keys (get (st-class-get "Fibonacci") :methods)))
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3)
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;; Each fib call is independent (no shared state between two instances).
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(st-test "two memo instances independent"
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(evp
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"| a b |
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a := Fibonacci new init.
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b := Fibonacci new init.
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a memoFib: 10.
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^ b memoFib: 10")
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55)
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;; ── eight-queens.st (kept in sync with lib/smalltalk/tests/programs/eight-queens.st) ──
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(define
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queens-source
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"Object subclass: #EightQueens
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instanceVariableNames: 'columns count size'!
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!EightQueens methodsFor: 'init'!
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init
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size := 8.
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columns := Array new: size.
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count := 0.
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^ self!
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size: n
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size := n.
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columns := Array new: n.
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count := 0.
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^ self! !
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!EightQueens methodsFor: 'access'!
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count ^ count!
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size ^ size! !
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!EightQueens methodsFor: 'solve'!
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solve
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self placeRow: 1.
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^ count!
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placeRow: row
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row > size ifTrue: [count := count + 1. ^ self].
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1 to: size do: [:col |
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(self isSafe: col atRow: row) ifTrue: [
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columns at: row put: col.
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self placeRow: row + 1]]!
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isSafe: col atRow: row
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| r prevCol delta |
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r := 1.
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[r < row] whileTrue: [
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prevCol := columns at: r.
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prevCol = col ifTrue: [^ false].
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delta := col - prevCol.
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delta abs = (row - r) ifTrue: [^ false].
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r := r + 1].
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^ true! !")
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(smalltalk-load queens-source)
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;; Backtracking is correct but slow on the spec interpreter (call/cc per
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;; method, dict-based ivar reads). 4- and 5-queens cover the corners
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;; and run in under 10s; 6+ work but would push past the test-runner
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;; timeout. The class itself defaults to size 8, ready for the JIT.
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(st-test "1 queen on 1x1 board" (evp "^ (EightQueens new size: 1) solve") 1)
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(st-test "4 queens on 4x4 board" (evp "^ (EightQueens new size: 4) solve") 2)
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(st-test "5 queens on 5x5 board" (evp "^ (EightQueens new size: 5) solve") 10)
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(st-test "EightQueens class is registered" (st-class-exists? "EightQueens") true)
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(st-test "EightQueens init sets size 8"
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(evp "^ EightQueens new init size") 8)
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;; ── quicksort.st ─────────────────────────────────────────────────────
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(define
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quicksort-source
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"Object subclass: #Quicksort
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instanceVariableNames: ''!
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!Quicksort methodsFor: 'sort'!
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sort: arr ^ self sort: arr from: 1 to: arr size!
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sort: arr from: low to: high
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| p |
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low < high ifTrue: [
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p := self partition: arr from: low to: high.
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self sort: arr from: low to: p - 1.
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self sort: arr from: p + 1 to: high].
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^ arr!
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partition: arr from: low to: high
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| pivot i tmp |
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pivot := arr at: high.
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i := low - 1.
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low to: high - 1 do: [:j |
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(arr at: j) <= pivot ifTrue: [
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i := i + 1.
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tmp := arr at: i.
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arr at: i put: (arr at: j).
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arr at: j put: tmp]].
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tmp := arr at: i + 1.
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arr at: i + 1 put: (arr at: high).
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arr at: high put: tmp.
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^ i + 1! !")
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(smalltalk-load quicksort-source)
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(st-test "Quicksort class registered" (st-class-exists? "Quicksort") true)
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(st-test "qsort small array"
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(evp "^ Quicksort new sort: #(3 1 2)")
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(list 1 2 3))
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(st-test "qsort with duplicates"
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(evp "^ Quicksort new sort: #(3 1 4 1 5 9 2 6 5 3 5)")
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(list 1 1 2 3 3 4 5 5 5 6 9))
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(st-test "qsort already-sorted"
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(evp "^ Quicksort new sort: #(1 2 3 4 5)")
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(list 1 2 3 4 5))
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(st-test "qsort reverse-sorted"
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(evp "^ Quicksort new sort: #(9 7 5 3 1)")
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(list 1 3 5 7 9))
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(st-test "qsort single element"
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(evp "^ Quicksort new sort: #(42)")
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(list 42))
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(st-test "qsort empty"
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(evp "^ Quicksort new sort: #()")
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(list))
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(st-test "qsort negatives"
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(evp "^ Quicksort new sort: #(-3 -1 -7 0 2)")
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(list -7 -3 -1 0 2))
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(st-test "qsort all-equal"
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(evp "^ Quicksort new sort: #(5 5 5 5)")
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(list 5 5 5 5))
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(st-test "qsort sorts in place (returns same array)"
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(evp
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"| arr q |
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arr := #(4 2 1 3).
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q := Quicksort new.
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q sort: arr.
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^ arr")
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(list 1 2 3 4))
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;; ── mandelbrot.st ────────────────────────────────────────────────────
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(define
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mandel-source
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"Object subclass: #Mandelbrot
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instanceVariableNames: ''!
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!Mandelbrot methodsFor: 'iteration'!
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escapeAt: cx and: cy maxIter: maxIter
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| zx zy zx2 zy2 i |
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zx := 0. zy := 0.
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zx2 := 0. zy2 := 0.
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i := 0.
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[(zx2 + zy2 < 4) and: [i < maxIter]] whileTrue: [
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zy := (zx * zy * 2) + cy.
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zx := zx2 - zy2 + cx.
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zx2 := zx * zx.
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zy2 := zy * zy.
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i := i + 1].
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^ i!
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inside: cx and: cy maxIter: maxIter
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^ (self escapeAt: cx and: cy maxIter: maxIter) >= maxIter! !
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!Mandelbrot methodsFor: 'grid'!
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countInsideRangeX: x0 to: x1 stepX: dx rangeY: y0 to: y1 stepY: dy maxIter: maxIter
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| x y count |
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count := 0.
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y := y0.
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[y <= y1] whileTrue: [
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x := x0.
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[x <= x1] whileTrue: [
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(self inside: x and: y maxIter: maxIter) ifTrue: [count := count + 1].
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x := x + dx].
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y := y + dy].
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^ count! !")
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(smalltalk-load mandel-source)
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(st-test "Mandelbrot class registered" (st-class-exists? "Mandelbrot") true)
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;; The origin is the cusp of the cardioid — z stays at 0 forever.
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(st-test "origin is in the set"
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(evp "^ Mandelbrot new inside: 0 and: 0 maxIter: 50") true)
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;; (-1, 0) — z₀=0, z₁=-1, z₂=0, … oscillates and stays bounded.
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(st-test "(-1, 0) is in the set"
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(evp "^ Mandelbrot new inside: -1 and: 0 maxIter: 50") true)
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;; (1, 0) — escapes after 2 iterations: 0 → 1 → 2, |z|² = 4 ≥ 4.
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(st-test "(1, 0) escapes quickly"
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(evp "^ Mandelbrot new escapeAt: 1 and: 0 maxIter: 50") 2)
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;; (2, 0) — escapes immediately: 0 → 2, |z|² = 4 ≥ 4 already.
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(st-test "(2, 0) escapes after 1 step"
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(evp "^ Mandelbrot new escapeAt: 2 and: 0 maxIter: 50") 1)
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;; (-2, 0) — z₀=0; iter 1: z₁=-2, |z|²=4, condition `< 4` fails → exits at i=1.
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(st-test "(-2, 0) escapes after 1 step"
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(evp "^ Mandelbrot new escapeAt: -2 and: 0 maxIter: 50") 1)
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;; (10, 10) — far outside, escapes on the first step.
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(st-test "(10, 10) escapes after 1 step"
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(evp "^ Mandelbrot new escapeAt: 10 and: 10 maxIter: 50") 1)
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;; Coarse 5x5 grid (-2..2 in 1-step increments, no half-steps to keep
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;; this fast). Membership of (-1,0), (0,0), (-1,-1)? We expect just
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;; (0,0) and (-1,0) at maxIter 30.
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;; Actually let's count exact membership at this resolution.
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(st-test "tiny 3x3 grid count"
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(evp
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"^ Mandelbrot new countInsideRangeX: -1 to: 1 stepX: 1
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rangeY: -1 to: 1 stepY: 1
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maxIter: 30")
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;; In-set points (bounded after 30 iters): (0,-1) (-1,0) (0,0) (0,1) → 4.
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4)
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;; ── life.st ──────────────────────────────────────────────────────────
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(define
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life-source
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"Object subclass: #Life
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instanceVariableNames: 'rows cols cells'!
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!Life methodsFor: 'init'!
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rows: r cols: c
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rows := r. cols := c.
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cells := Array new: r * c.
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1 to: r * c do: [:i | cells at: i put: 0].
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^ self! !
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!Life methodsFor: 'access'!
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rows ^ rows!
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cols ^ cols!
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at: r at: c
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((r < 1) or: [r > rows]) ifTrue: [^ 0].
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((c < 1) or: [c > cols]) ifTrue: [^ 0].
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^ cells at: (r - 1) * cols + c!
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at: r at: c put: v
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cells at: (r - 1) * cols + c put: v.
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^ v! !
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!Life methodsFor: 'step'!
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neighbors: r at: c
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| sum |
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sum := 0.
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-1 to: 1 do: [:dr |
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-1 to: 1 do: [:dc |
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((dr = 0) and: [dc = 0]) ifFalse: [
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sum := sum + (self at: r + dr at: c + dc)]]].
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^ sum!
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step
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| next |
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next := Array new: rows * cols.
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1 to: rows * cols do: [:i | next at: i put: 0].
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1 to: rows do: [:r |
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1 to: cols do: [:c |
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| n alive lives |
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n := self neighbors: r at: c.
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alive := (self at: r at: c) = 1.
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lives := alive
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ifTrue: [(n = 2) or: [n = 3]]
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ifFalse: [n = 3].
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lives ifTrue: [next at: (r - 1) * cols + c put: 1]]].
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cells := next.
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^ self!
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stepN: n
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n timesRepeat: [self step].
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^ self! !
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!Life methodsFor: 'measure'!
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livingCount
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| sum |
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sum := 0.
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1 to: rows * cols do: [:i | (cells at: i) = 1 ifTrue: [sum := sum + 1]].
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^ sum! !")
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(smalltalk-load life-source)
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(st-test "Life class registered" (st-class-exists? "Life") true)
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;; Block (still life): four cells in a 2x2 stay forever after 1 step.
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;; The bigger patterns are correct but the spec interpreter is too slow
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;; for many-step verification — the `.st` file is ready for the JIT.
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(st-test "block (still life) survives 1 step"
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(evp
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"| g |
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g := Life new rows: 5 cols: 5.
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g at: 2 at: 2 put: 1.
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g at: 2 at: 3 put: 1.
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g at: 3 at: 2 put: 1.
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g at: 3 at: 3 put: 1.
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g step.
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^ g livingCount")
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4)
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;; Blinker (period 2): horizontal row of 3 → vertical column.
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(st-test "blinker after 1 step is vertical"
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(evp
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"| g |
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g := Life new rows: 5 cols: 5.
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g at: 3 at: 2 put: 1.
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g at: 3 at: 3 put: 1.
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g at: 3 at: 4 put: 1.
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g step.
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^ {(g at: 2 at: 3). (g at: 3 at: 3). (g at: 4 at: 3). (g at: 3 at: 2). (g at: 3 at: 4)}")
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;; (2,3) (3,3) (4,3) on; (3,2) (3,4) off
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(list 1 1 1 0 0))
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;; Glider initial setup — 5 living cells, no step.
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(st-test "glider has 5 living cells initially"
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(evp
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"| g |
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g := Life new rows: 8 cols: 8.
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g at: 1 at: 2 put: 1.
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g at: 2 at: 3 put: 1.
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g at: 3 at: 1 put: 1.
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g at: 3 at: 2 put: 1.
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g at: 3 at: 3 put: 1.
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^ g livingCount")
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5)
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(list st-test-pass st-test-fail)
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