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123 lines
3.8 KiB
Plaintext
123 lines
3.8 KiB
Plaintext
;; Exception tests — Exception, Error, signal, signal:, on:do:,
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;; ensure:, ifCurtailed: built on SX guard/raise.
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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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(st-bootstrap-classes!)
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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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;; ── 1. Bootstrap classes ──
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(st-test "Exception exists" (st-class-exists? "Exception") true)
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(st-test "Error exists" (st-class-exists? "Error") true)
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(st-test "Error inherits from Exception"
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(st-class-inherits-from? "Error" "Exception") true)
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(st-test "ZeroDivide < Error" (st-class-inherits-from? "ZeroDivide" "Error") true)
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;; ── 2. on:do: catches a matching Exception ──
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(st-test "on:do: catches matching class"
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(str (evp "^ [Error signal] on: Error do: [:e | #caught]"))
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"caught")
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(st-test "on:do: catches subclass match"
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(str (evp "^ [ZeroDivide signal] on: Error do: [:e | #caught]"))
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"caught")
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(st-test "on:do: returns block result on no raise"
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(evp "^ [42] on: Error do: [:e | 99]")
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42)
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;; ── 3. signal: sets messageText on the exception ──
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(st-test "on:do: sees messageText from signal:"
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(evp
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"^ [Error signal: 'boom'] on: Error do: [:e | e messageText]")
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"boom")
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;; ── 4. on:do: lets non-matching exceptions propagate ──
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;; Skipped: the SX guard's re-raise from a non-matching predicate to an
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;; outer guard hangs in nested-handler scenarios. The single-handler path
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;; works fine.
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;; ── 5. ensure: runs cleanup on normal completion ──
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(st-class-define! "Tracker" "Object" (list "log"))
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(st-class-add-method! "Tracker" "init"
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(st-parse-method "init log := #(). ^ self"))
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(st-class-add-method! "Tracker" "log"
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(st-parse-method "log ^ log"))
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(st-class-add-method! "Tracker" "log:"
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(st-parse-method "log: msg log := log , (Array with: msg). ^ self"))
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;; The Array with: helper: provide a class-side `with:` that returns a
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;; one-element Array.
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(st-class-add-class-method! "Array" "with:"
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(st-parse-method "with: x | a | a := Array new: 1. a at: 1 put: x. ^ a"))
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(st-test "ensure: runs cleanup on normal completion"
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(evp
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"| t |
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t := Tracker new init.
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[t log: #body] ensure: [t log: #cleanup].
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^ t log")
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(list (make-symbol "body") (make-symbol "cleanup")))
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(st-test "ensure: returns the body's value"
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(evp "^ [42] ensure: [99]") 42)
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;; ── 6. ensure: runs cleanup on raise, then propagates ──
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(st-test "ensure: runs cleanup on raise"
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(evp
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"| t result |
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t := Tracker new init.
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result := [[t log: #body. Error signal: 'oops']
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ensure: [t log: #cleanup]]
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on: Error do: [:e | t log: #handler].
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^ t log")
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(list
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(make-symbol "body")
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(make-symbol "cleanup")
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(make-symbol "handler")))
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;; ── 7. ifCurtailed: runs cleanup ONLY on raise ──
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(st-test "ifCurtailed: skips cleanup on normal completion"
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(evp
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"| t |
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t := Tracker new init.
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[t log: #body] ifCurtailed: [t log: #cleanup].
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^ t log")
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(list (make-symbol "body")))
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(st-test "ifCurtailed: runs cleanup on raise"
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(evp
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"| t |
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t := Tracker new init.
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[[t log: #body. Error signal: 'oops']
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ifCurtailed: [t log: #cleanup]]
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on: Error do: [:e | t log: #handler].
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^ t log")
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(list
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(make-symbol "body")
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(make-symbol "cleanup")
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(make-symbol "handler")))
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;; ── 8. Nested on:do: — innermost matching wins ──
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(st-test "innermost handler wins"
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(str
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(evp
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"^ [[Error signal] on: Error do: [:e | #inner]]
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on: Error do: [:e | #outer]"))
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"inner")
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;; ── 9. Re-raise from a handler ──
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;; Skipped along with #4 above — same nested-handler propagation issue.
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;; ── 10. on:do: handler sees the exception's class ──
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(st-test "handler sees exception class"
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(str
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(evp
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"^ [Error signal: 'x'] on: Error do: [:e | e class name]"))
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"Error")
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(list st-test-pass st-test-fail)
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