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Implement sx-swap pure tree rewriting and fix handler test infrastructure

Browse Source 
Write lib/sx-swap.sx — string-level SX scanner that finds elements by :id
and applies swap operations (innerHTML, outerHTML, beforeend, afterbegin,
beforebegin, afterend, delete, none). Includes OOB extraction via
find-oob-elements/strip-oob/apply-response for out-of-band targeted swaps.

Fix &rest varargs bug in test-handlers.sx helper mock — fn doesn't support
&rest, so change to positional (name a1 a2) with nil defaults. Fix into
branch, add run-handler sx-expr unwrapping.

Add missing primitives to run_tests.ml: scope-peek, callable?, make-sx-expr,
sx-expr-source, sx-expr?, spread?, call-lambda. These unblock aser-based
handler evaluation in tests.

Add algebraic integration tests (test-swap-integration.sx) demonstrating the
sx1 ⊕(mode,target) sx2 = sx3 pattern with real handler execution.

1219 → 1330 passing tests (+111).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
giles
2026-04-01 18:00:51 +00:00
parent f5f58ea47e
commit aa508bad77
5 changed files with 1445 additions and 2 deletions
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681
web/tests/test-handlers.sx Normal file
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(define _mock-form (dict))
(define _mock-args (dict))
(define _mock-state (dict))
(define _mock-body "")
(define _mock-content-type "")
(define _mock-headers (dict))
(define _mock-now "12:00:00")
(define
reset-mocks!
(fn
()
(do
(set! _mock-form (dict))
(set! _mock-args (dict))
(set! _mock-state (dict))
(set! _mock-body "")
(set! _mock-content-type "")
(set! _mock-headers (dict)))))
(define
helper
(fn
(name a1 a2)
(cond
(= name "request-form")
(let
((key (or a1 "")) (default (if (nil? a2) "" a2)))
(let ((val (get _mock-form key))) (if (nil? val) default val)))
(= name "request-arg")
(let
((key (or a1 "")) (default a2))
(let ((val (get _mock-args key))) (if (nil? val) default val)))
(= name "state-get")
(let
((key (or a1 "")) (default a2))
(let ((val (get _mock-state key))) (if (nil? val) default val)))
(= name "state-set!")
(do (set! _mock-state (assoc _mock-state a1 a2)) nil)
(= name "now")
(if (nil? a1) _mock-now _mock-now)
(= name "component-source")
(str "(defcomp " a1 " () (div))")
(= name "request-json")
_mock-body
(= name "request-content-type")
_mock-content-type
(= name "request-form-list")
(or (get _mock-form a1) (list))
(= name "request-args-all")
_mock-args
(= name "request-headers-all")
_mock-headers
(= name "request-form-all")
_mock-form
(= name "request-header")
(or (get _mock-headers a1) a2)
(= name "request-file-name")
(or (get _mock-form a1) "")
(= name "into")
(let
((coll (if (nil? a2) a1 a2)))
(if
(dict? coll)
(map (fn (key) (list key (get coll key))) (keys coll))
(if (nil? coll) (list) coll)))
:else nil)))
(define sleep (fn (ms) nil))
(define set-response-status (fn (code) nil))
(define json-encode (fn (val) (inspect val)))
(define
run-handler
(fn
(hdef)
(let
((result (aser (get hdef "body") (get hdef "closure"))))
(if
(sx-expr? result)
(sx-expr-source result)
(if (string? result) result (str result))))))
(defsuite
"example:click-to-load"
(deftest
"returns content with timestamp"
(reset-mocks!)
(let
((result (run-handler handler:ex-click)))
(assert-true (contains? result "Content loaded!"))))
(deftest
"includes mock time"
(reset-mocks!)
(let
((result (run-handler handler:ex-click)))
(assert-true (contains? result _mock-now))))
(deftest
"includes OOB code panel"
(reset-mocks!)
(let
((result (run-handler handler:ex-click)))
(assert-true (contains? result "click-comp")))))
(defsuite
"example:form-submission"
(deftest
"greets by name"
(reset-mocks!)
(set! _mock-form {:name "Alice"})
(let
((result (run-handler handler:ex-form)))
(assert-true (contains? result "Alice"))))
(deftest
"greets stranger when empty"
(reset-mocks!)
(set! _mock-form {:name ""})
(let
((result (run-handler handler:ex-form)))
(assert-true (contains? result "stranger"))))
(deftest
"includes wire format OOB"
(reset-mocks!)
(set! _mock-form {:name "Bob"})
(let
((result (run-handler handler:ex-form)))
(assert-true (contains? result "form-wire"))))
(deftest
"wire shows component call with name"
(reset-mocks!)
(set! _mock-form {:name "Bob"})
(let
((result (run-handler handler:ex-form)))
(assert-true (contains? result "Bob")))))
(defsuite
"example:polling"
(deftest
"increments counter from zero"
(reset-mocks!)
(run-handler handler:ex-poll)
(assert-equal 1 (get _mock-state "ex-poll-n")))
(deftest
"increments counter on second call"
(reset-mocks!)
(run-handler handler:ex-poll)
(run-handler handler:ex-poll)
(assert-equal 2 (get _mock-state "ex-poll-n")))
(deftest
"returns timestamp"
(reset-mocks!)
(let
((result (run-handler handler:ex-poll)))
(assert-true (contains? result _mock-now))))
(deftest
"returns counter value"
(reset-mocks!)
(run-handler handler:ex-poll)
(let
((result (run-handler handler:ex-poll)))
(assert-true (contains? result "2")))))
(defsuite
"example:delete-row"
(deftest
"returns OOB code panel"
(reset-mocks!)
(let
((result (run-handler handler:ex-delete)))
(assert-true (string? result))))
(deftest
"is valid SX"
(reset-mocks!)
(let
((result (run-handler handler:ex-delete)))
(assert-true (> (len result) 0)))))
(defsuite
"example:inline-edit"
(deftest
"edit-form returns current value"
(reset-mocks!)
(set! _mock-args {:value "hello"})
(let
((result (run-handler handler:ex-edit-form)))
(assert-true (contains? result "hello"))))
(deftest
"edit-save returns new value"
(reset-mocks!)
(set! _mock-form {:value "updated"})
(let
((result (run-handler handler:ex-edit-save)))
(assert-true (contains? result "updated"))))
(deftest
"edit-cancel restores original"
(reset-mocks!)
(set! _mock-args {:value "original"})
(let
((result (run-handler handler:ex-edit-cancel)))
(assert-true (contains? result "original"))))
(deftest
"full cycle: edit → save → cancel"
(reset-mocks!)
(set! _mock-args {:value "v1"})
(let
((edit (run-handler handler:ex-edit-form)))
(do
(assert-true (contains? edit "v1"))
(set! _mock-form {:value "v2"})
(let
((saved (run-handler handler:ex-edit-save)))
(do
(assert-true (contains? saved "v2"))
(set! _mock-args {:value "v1"})
(let
((cancelled (run-handler handler:ex-edit-cancel)))
(assert-true (contains? cancelled "v1")))))))))
(defsuite
"example:oob-updates"
(deftest
"returns timestamp"
(reset-mocks!)
(let
((result (run-handler handler:ex-oob)))
(assert-true (contains? result _mock-now))))
(deftest
"includes OOB swap target"
(reset-mocks!)
(let
((result (run-handler handler:ex-oob)))
(assert-true (contains? result "sx-swap-oob")))))
(defsuite
"example:lazy-load"
(deftest
"returns timestamp"
(reset-mocks!)
(let
((result (run-handler handler:ex-lazy)))
(assert-true (contains? result _mock-now))))
(deftest
"includes content message"
(reset-mocks!)
(let
((result (run-handler handler:ex-lazy)))
(assert-true (contains? result "page render")))))
(defsuite
"example:infinite-scroll"
(deftest
"page 2 returns items"
(reset-mocks!)
(set! _mock-args {:page "2"})
(let
((result (run-handler handler:ex-scroll)))
(assert-true (> (len result) 50))))
(deftest
"page 10 shows all loaded"
(reset-mocks!)
(set! _mock-args {:page "10"})
(let
((result (run-handler handler:ex-scroll)))
(assert-true (contains? result "loaded")))))
(defsuite
"example:progress-bar"
(deftest
"start creates job counter"
(reset-mocks!)
(run-handler handler:ex-progress-start)
(assert-equal 1 (get _mock-state "ex-job-counter")))
(deftest
"start initializes job at 0"
(reset-mocks!)
(run-handler handler:ex-progress-start)
(assert-equal 0 (get _mock-state "ex-job-1")))
(deftest
"status increments progress"
(reset-mocks!)
(set! _mock-state (assoc _mock-state "ex-job-1" 50))
(set! _mock-args {:job "1"})
(run-handler handler:ex-progress-status)
(assert-true (> (get _mock-state "ex-job-1") 50)))
(deftest
"full cycle: start → poll status"
(reset-mocks!)
(run-handler handler:ex-progress-start)
(set! _mock-args {:job "1"})
(run-handler handler:ex-progress-status)
(assert-true (> (get _mock-state "ex-job-1") 0))))
(defsuite
"example:search"
(deftest
"finds Python"
(reset-mocks!)
(set! _mock-args {:q "python"})
(let
((result (run-handler handler:ex-search)))
(assert-true (contains? result "Python"))))
(deftest
"finds multiple matches"
(reset-mocks!)
(set! _mock-args {:q "java"})
(let
((result (run-handler handler:ex-search)))
(assert-true (contains? result "Java"))))
(deftest
"empty query returns prompt"
(reset-mocks!)
(set! _mock-args {:q ""})
(let
((result (run-handler handler:ex-search)))
(assert-true (contains? result "type to search"))))
(deftest
"no match returns empty"
(reset-mocks!)
(set! _mock-args {:q "zzzznothing"})
(let
((result (run-handler handler:ex-search)))
(assert-true (not (contains? result "Python"))))))
(defsuite
"example:validation"
(deftest
"rejects empty"
(reset-mocks!)
(set! _mock-args {:email ""})
(let
((result (run-handler handler:ex-validate)))
(assert-true (contains? result "required"))))
(deftest
"rejects no @"
(reset-mocks!)
(set! _mock-args {:email "bad"})
(let
((result (run-handler handler:ex-validate)))
(assert-true (contains? result "@"))))
(deftest
"rejects taken email"
(reset-mocks!)
(set! _mock-args {:email "alice@example.com"})
(let
((result (run-handler handler:ex-validate)))
(assert-true (contains? result "taken"))))
(deftest
"accepts valid email"
(reset-mocks!)
(set! _mock-args {:email "new@example.com"})
(let
((result (run-handler handler:ex-validate)))
(assert-true (contains? result "available"))))
(deftest
"submit with valid email succeeds"
(reset-mocks!)
(set! _mock-form {:email "ok@test.com"})
(let
((result (run-handler handler:ex-validate-submit)))
(assert-true (contains? result "ok@test.com")))))
(defsuite
"example:dependent-select"
(deftest
"returns options for frontend"
(reset-mocks!)
(set! _mock-args {:category "frontend"})
(let
((result (run-handler handler:ex-values)))
(assert-true (contains? result "option"))))
(deftest
"empty category returns empty"
(reset-mocks!)
(set! _mock-args {:category ""})
(let
((result (run-handler handler:ex-values)))
(assert-true (string? result)))))
(defsuite
"example:form-reset"
(deftest
"echoes submitted message"
(reset-mocks!)
(set! _mock-form {:message "Hello world"})
(let
((result (run-handler handler:ex-reset-submit)))
(assert-true (contains? result "Hello world"))))
(deftest
"includes timestamp"
(reset-mocks!)
(set! _mock-form {:message "test"})
(let
((result (run-handler handler:ex-reset-submit)))
(assert-true (contains? result _mock-now)))))
(defsuite
"example:row-editing"
(deftest
"form loads row data"
(reset-mocks!)
(set! _mock-args {:row-id "1"})
(let
((result (run-handler handler:ex-editrow-form)))
(assert-true (> (len result) 10))))
(deftest
"save stores row in state"
(reset-mocks!)
(set! _mock-args {:row-id "1"})
(set! _mock-form {:stock "50" :price "9.99" :name "Widget"})
(run-handler handler:ex-editrow-save)
(let
((row (get _mock-state "ex-row-1")))
(assert-equal "Widget" (get row "name"))))
(deftest
"save stores price"
(reset-mocks!)
(set! _mock-args {:row-id "1"})
(set! _mock-form {:stock "5" :price "19.99" :name "X"})
(run-handler handler:ex-editrow-save)
(let
((row (get _mock-state "ex-row-1")))
(assert-equal "19.99" (get row "price"))))
(deftest
"cancel returns view"
(reset-mocks!)
(set! _mock-args {:row-id "1"})
(let
((result (run-handler handler:ex-editrow-cancel)))
(assert-true (> (len result) 10))))
(deftest
"full cycle: edit → save → cancel"
(reset-mocks!)
(set! _mock-args {:row-id "2"})
(let
((form (run-handler handler:ex-editrow-form)))
(do
(assert-true (string? form))
(set! _mock-form {:stock "100" :price "5.00" :name "Gadget"})
(run-handler handler:ex-editrow-save)
(assert-equal "Gadget" (get (get _mock-state "ex-row-2") "name"))
(let
((view (run-handler handler:ex-editrow-cancel)))
(assert-true (string? view)))))))
(defsuite
"example:profile-editing"
(deftest
"edit loads current profile"
(reset-mocks!)
(let
((result (run-handler handler:ex-pp-edit-all)))
(assert-true (string? result))))
(deftest
"put saves all fields"
(reset-mocks!)
(set! _mock-form {:email "bob@test.com" :role "admin" :name "Bob"})
(run-handler handler:ex-pp-put)
(let
((p (get _mock-state "ex-profile")))
(do
(assert-equal "Bob" (get p "name"))
(assert-equal "bob@test.com" (get p "email"))
(assert-equal "admin" (get p "role")))))
(deftest
"cancel returns view"
(reset-mocks!)
(let
((result (run-handler handler:ex-pp-cancel)))
(assert-true (string? result))))
(deftest
"full cycle: edit → put → view"
(reset-mocks!)
(run-handler handler:ex-pp-edit-all)
(set! _mock-form {:email "c@x.com" :role "user" :name "Carol"})
(run-handler handler:ex-pp-put)
(let
((view (run-handler handler:ex-pp-cancel)))
(assert-true (contains? view "Carol")))))
(defsuite
"example:bulk-operations"
(deftest
"activates selected users"
(reset-mocks!)
(set! _mock-args {:action "activate"})
(set! _mock-form {:ids (list "u1" "u2")})
(let
((result (run-handler handler:ex-bulk)))
(assert-true (string? result)))))
(defsuite
"example:swap-modes"
(deftest
"increments counter"
(reset-mocks!)
(set! _mock-args {:mode "beforeend"})
(run-handler handler:ex-swap-log)
(assert-equal 1 (get _mock-state "ex-swap-n")))
(deftest
"returns timestamp"
(reset-mocks!)
(set! _mock-args {:mode "innerHTML"})
(let
((result (run-handler handler:ex-swap-log)))
(assert-true (contains? result _mock-now))))
(deftest
"includes OOB counter update"
(reset-mocks!)
(set! _mock-args {:mode "beforeend"})
(let
((result (run-handler handler:ex-swap-log)))
(assert-true (contains? result "swap-counter")))))
(defsuite
"example:dashboard"
(deftest
"shows user count"
(reset-mocks!)
(let
((result (run-handler handler:ex-dashboard)))
(assert-true (contains? result "142"))))
(deftest
"shows revenue"
(reset-mocks!)
(let
((result (run-handler handler:ex-dashboard)))
(assert-true (contains? result "4.2k"))))
(deftest
"includes timestamp"
(reset-mocks!)
(let
((result (run-handler handler:ex-dashboard)))
(assert-true (contains? result _mock-now)))))
(defsuite
"example:tabs"
(deftest
"returns tab content"
(reset-mocks!)
(set! _mock-args {:tab "features"})
(let
((result (run-handler handler:ex-tabs)))
(assert-true (> (len result) 20))))
(deftest
"includes OOB tab buttons"
(reset-mocks!)
(set! _mock-args {:tab "features"})
(let
((result (run-handler handler:ex-tabs)))
(assert-true (contains? result "tab-buttons")))))
(defsuite
"example:animation"
(deftest
"returns content"
(reset-mocks!)
(let
((result (run-handler handler:ex-animate)))
(assert-true (> (len result) 20))))
(deftest
"includes timestamp"
(reset-mocks!)
(let
((result (run-handler handler:ex-animate)))
(assert-true (contains? result _mock-now)))))
(defsuite
"example:dialog"
(deftest
"open returns modal content"
(reset-mocks!)
(let
((result (run-handler handler:ex-dialog)))
(assert-true (> (len result) 20))))
(deftest
"close returns response"
(reset-mocks!)
(let
((result (run-handler handler:ex-dialog-close)))
(assert-true (string? result)))))
(defsuite
"example:keyboard"
(deftest
"returns action for Enter"
(reset-mocks!)
(set! _mock-args {:key "Enter"})
(let
((result (run-handler handler:ex-keyboard)))
(assert-true (> (len result) 10))))
(deftest
"returns action for Escape"
(reset-mocks!)
(set! _mock-args {:key "Escape"})
(let
((result (run-handler handler:ex-keyboard)))
(assert-true (> (len result) 10)))))
(defsuite
"example:json-echo"
(deftest
"echoes content type"
(reset-mocks!)
(set! _mock-body "{\"key\":\"val\"}")
(set! _mock-content-type "application/json")
(let
((result (run-handler handler:ex-json-echo)))
(assert-true (contains? result "application/json"))))
(deftest
"echoes body"
(reset-mocks!)
(set! _mock-body "{\"hello\":\"world\"}")
(set! _mock-content-type "application/json")
(let
((result (run-handler handler:ex-json-echo)))
(assert-true (contains? result "hello")))))
(defsuite
"example:echo-vals"
(deftest
"echoes query args"
(reset-mocks!)
(set! _mock-args {:foo "bar" :baz "qux"})
(let
((result (run-handler handler:ex-echo-vals)))
(assert-true (string? result)))))
(defsuite
"example:echo-headers"
(deftest
"echoes x-prefixed headers"
(reset-mocks!)
(set! _mock-headers {:x-custom "value" :content-type "text/plain"})
(let
((result (run-handler handler:ex-echo-headers)))
(assert-true (string? result)))))
(defsuite
"example:loading"
(deftest
"returns content (sleep mocked)"
(reset-mocks!)
(let
((result (run-handler handler:ex-slow)))
(assert-true (contains? result _mock-now)))))
(defsuite
"example:dedup-search"
(deftest
"returns search result"
(reset-mocks!)
(set! _mock-args {:q "test"})
(let
((result (run-handler handler:ex-slow-search)))
(assert-true (contains? result "test")))))
(defsuite
"example:retry"
(deftest
"first call increments counter"
(reset-mocks!)
(run-handler handler:ex-flaky)
(assert-equal 1 (get _mock-state "ex-flaky-n")))
(deftest
"third call succeeds (mod 3)"
(reset-mocks!)
(run-handler handler:ex-flaky)
(run-handler handler:ex-flaky)
(let
((result (run-handler handler:ex-flaky)))
(do
(assert-equal 3 (get _mock-state "ex-flaky-n"))
(assert-true (contains? result "Success"))))))

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(define _mock-form (dict))
(define _mock-args (dict))
(define _mock-state (dict))
(define _mock-body "")
(define _mock-content-type "")
(define _mock-headers (dict))
(define _mock-now "12:00:00")
(define
reset-mocks!
(fn
()
(do
(set! _mock-form (dict))
(set! _mock-args (dict))
(set! _mock-state (dict))
(set! _mock-body "")
(set! _mock-content-type "")
(set! _mock-headers (dict)))))
(define
helper
(fn
(name a1 a2)
(cond
(= name "request-form")
(let
((key (or a1 "")) (default (if (nil? a2) "" a2)))
(let ((val (get _mock-form key))) (if (nil? val) default val)))
(= name "request-arg")
(let
((key (or a1 "")) (default a2))
(let ((val (get _mock-args key))) (if (nil? val) default val)))
(= name "state-get")
(let
((key (or a1 "")) (default a2))
(let ((val (get _mock-state key))) (if (nil? val) default val)))
(= name "state-set!")
(do (set! _mock-state (assoc _mock-state a1 a2)) nil)
(= name "now")
_mock-now
(= name "component-source")
(str "(defcomp " a1 " () (div))")
(= name "request-json")
_mock-body
(= name "request-content-type")
_mock-content-type
(= name "request-form-list")
(or (get _mock-form a1) (list))
(= name "request-args-all")
_mock-args
(= name "request-headers-all")
_mock-headers
(= name "request-form-all")
_mock-form
(= name "request-header")
(or (get _mock-headers a1) a2)
(= name "request-file-name")
(or (get _mock-form a1) "")
(= name "into")
(let
((coll (if (nil? a2) a1 a2)))
(if
(dict? coll)
(map (fn (key) (list key (get coll key))) (keys coll))
(if (nil? coll) (list) coll)))
:else nil)))
(define sleep (fn (ms) nil))
(define set-response-status (fn (code) nil))
(define json-encode (fn (val) (inspect val)))
(define
run-handler
(fn
(hdef)
(let
((result (aser (get hdef "body") (get hdef "closure"))))
(if
(sx-expr? result)
(sx-expr-source result)
(if (string? result) result (str result))))))
(defsuite
"swap:click-to-load"
(deftest
"innerHTML replaces target content"
(reset-mocks!)
(let
((page "(div :id \"click-result\" (p \"Click the button\"))")
(response (run-handler handler:ex-click)))
(let
((result (sx-swap page "innerHTML" "click-result" response)))
(do
(assert-true (contains? result "~examples/click-result"))
(assert-true (contains? result "12:00:00"))
(assert-false (contains? result "Click the button")))))))
(defsuite
"swap:form-submission"
(deftest
"innerHTML replaces with greeting"
(reset-mocks!)
(set! _mock-form {:name "Alice"})
(let
((page "(div :id \"form-result\" (p \"Submit the form\"))")
(response (run-handler handler:ex-form)))
(let
((result (sx-swap page "innerHTML" "form-result" response)))
(do
(assert-true (contains? result "Alice"))
(assert-false (contains? result "Submit the form")))))))
(defsuite
"swap:polling"
(deftest
"innerHTML shows counter after increment"
(reset-mocks!)
(let
((page "(div :id \"poll-result\" (p \"Waiting...\"))")
(response (run-handler handler:ex-poll)))
(let
((result (sx-swap page "innerHTML" "poll-result" response)))
(do
(assert-true (contains? result "1"))
(assert-false (contains? result "Waiting")))))))
(defsuite
"swap:oob-updates"
(deftest
"primary + OOB both update"
(reset-mocks!)
(let
((page "(div (div :id \"oob-box-a\" (p \"A old\")) (div :id \"oob-box-b\" (p \"B old\")))")
(response (run-handler handler:ex-oob)))
(let
((result (apply-response page response "innerHTML" "oob-box-a")))
(do
(assert-true (contains? result "Box A updated!"))
(assert-true (contains? result "Box B updated!"))
(assert-false (contains? result "A old"))
(assert-false (contains? result "B old")))))))
(defsuite
"swap:search"
(deftest
"innerHTML replaces search results"
(reset-mocks!)
(set! _mock-args {:q "Python"})
(let
((page "(div :id \"search-result\" (p \"Type to search\"))")
(response (run-handler handler:ex-search)))
(let
((result (sx-swap page "innerHTML" "search-result" response)))
(do
(assert-true (contains? result "Python"))
(assert-false (contains? result "Type to search")))))))
(defsuite
"swap:delete-row"
(deftest
"outerHTML removes element"
(let
((page "(table (tr :id \"row-1\" (td \"Item 1\")) (tr :id \"row-2\" (td \"Item 2\")))")
(response ""))
(let
((result (sx-swap page "outerHTML" "row-1" response)))
(do
(assert-false (contains? result "Item 1"))
(assert-true (contains? result "Item 2")))))))
(defsuite
"swap:beforeend"
(deftest
"appends new item to list"
(let
((page "(ul :id \"items\" (li \"first\"))") (response "(li \"second\")"))
(let
((result (sx-swap page "beforeend" "items" response)))
(do
(assert-true (contains? result "first"))
(assert-true (contains? result "second")))))))
(defsuite
"swap:state-across-calls"
(deftest
"counter increments across handler calls"
(reset-mocks!)
(let
((r1 (run-handler handler:ex-poll)))
(let
((r2 (run-handler handler:ex-poll)))
(let
((page "(div :id \"counter\" (span \"0\"))")
(result (sx-swap page "innerHTML" "counter" r2)))
(assert-true (contains? result "2")))))))