Increase targeted coverage for parser, codegen, execution tree, and GraphQL transform edge paths by Copilot · Pull Request #92 · stackables/bridge

Copilot · 2026-03-05T09:54:33Z

Coverage was notably lower than desired in five hotspots: parser (parser.ts), compiler codegen (codegen.ts), parser serializer (bridge-format.ts), runtime execution tree (ExecutionTree.ts), and GraphQL bridge transform (bridge-transform.ts).
This PR adds focused tests for previously under-exercised branches in those files without changing runtime behavior.

Parser diagnostics + reserved-name guards (bridge-parser/src/parser/parser.ts)
- Added tests for lexer diagnostic emission with concrete range assertions.
- Added reserved source identifier rejection coverage (input used as const name), hitting assertNotReserved error paths.
Serializer edge behavior (bridge-parser/src/bridge-format.ts)
- Added tests for passthrough shorthand serialization (bridge ... with <tool>).
- Added tests for compact default handle serialization (with input, with output, with const).
Requested field matching branches (bridge-compiler/src/codegen.ts)
- Added tests for requestedFields parent/child/wildcard matching:
  - parent includes descendants (meta)
  - nested path includes required container (meta.age)
  - one-level wildcard semantics (meta.*)
ExecutionTree guard + path traversal branches (bridge-core/src/ExecutionTree.ts)
- Added tests for max-depth panic path.
- Added tests for abort handling in shadow array creation.
- Added tests for applyPath root-safe null handling and array/object-access warning branch.
GraphQL transform option + helper branches (bridge-graphql/src/bridge-transform.ts)
- Added tests for dynamic document source (document(context)) with contextMapper.
- Added tests for option paths (toolTimeoutMs, maxDepth) applied to root tree.
- Added coverage for getBridgeTraces empty fallback and useBridgeTracing extension injection.

Example (new requestedFields branch coverage):

const { code } = compileBridge(document, {
  operation: "Query.profile",
  requestedFields: ["meta.*"],
});
const fn = buildAotFn(code);
const data = await fn({ name: "Ada", age: 37, city: "Tallinn" }, {}, {});
assert.deepEqual(data, { meta: { age: 37 } });

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

api.open-meteo.com
- Triggering command: /opt/hostedtoolcache/node/24.14.0/x64/bin/node /opt/hostedtoolcache/node/24.14.0/x64/bin/node --heap-prof-interval=524288 --cpu-prof-interval=1000 --test-coverage-functions=0 --test-concurrency=0 --inspect-publish-uid=stderr,http --inspect-port=127.0.0.1:9229 --experimental-transform-types --report-signal=SIGUSR2 --test-coverage-lines=0 --test-isolation=process --conditions=source --tls-cipher-list=TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA est/*.test.ts (dns block)
- Triggering command: /opt/hostedtoolcache/node/24.14.0/x64/bin/node /opt/hostedtoolcache/node/24.14.0/x64/bin/node --heap-prof-interval=524288 --cpu-prof-interval=1000 --test-coverage-functions=0 --test-concurrency=0 --inspect-publish-uid=stderr,http --inspect-port=127.0.0.1:9229 --experimental-transform-types --report-signal=SIGUSR2 --test-coverage-lines=0 --test-isolation=process --conditions=source --tls-cipher-list=TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA est/*.test.ts --test-coverage-functions=0 s --inspect-publissh --inspect-port=1-c --experimental-tpnpm -r e2e sh (dns block)
- Triggering command: /opt/hostedtoolcache/node/24.14.0/x64/bin/node /opt/hostedtoolcache/node/24.14.0/x64/bin/node --heap-prof-interval=524288 --cpu-prof-interval=1000 --test-coverage-functions=0 --test-concurrency=0 --inspect-publish-uid=stderr,http --inspect-port=127.0.0.1:9229 --experimental-transform-types --report-signal=SIGUSR2 --test-coverage-lines=0 --test-isolation=process --conditions=source --tls-cipher-list=TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA est/*.test.ts --test-coverage-functions=0 odules/npm/node_modules/@npmcli/run-script/lib/node-gyp-bin/node --inspect-publissh --inspect-port=1-c --experimental-tpnpm -r e2e sh (dns block)
dummyjson.com
- Triggering command: /opt/hostedtoolcache/node/24.14.0/x64/bin/node /opt/hostedtoolcache/node/24.14.0/x64/bin/node --heap-prof-interval=524288 --cpu-prof-interval=1000 --test-coverage-functions=0 --test-concurrency=0 --inspect-publish-uid=stderr,http --inspect-port=127.0.0.1:9229 --experimental-transform-types --report-signal=SIGUSR2 --test-coverage-lines=0 --test-isolation=process --conditions=source --tls-cipher-list=TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA est/*.test.ts (dns block)
- Triggering command: /opt/hostedtoolcache/node/24.14.0/x64/bin/node /opt/hostedtoolcache/node/24.14.0/x64/bin/node --heap-prof-interval=524288 --cpu-prof-interval=1000 --test-coverage-functions=0 --test-concurrency=0 --inspect-publish-uid=stderr,http --inspect-port=127.0.0.1:9229 --experimental-transform-types --report-signal=SIGUSR2 --test-coverage-lines=0 --test-isolation=process --conditions=source --tls-cipher-list=TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA est/*.test.ts --test-coverage-functions=0 s --inspect-publissh --inspect-port=1-c --experimental-tpnpm -r e2e sh (dns block)
nominatim.openstreetmap.org
- Triggering command: /opt/hostedtoolcache/node/24.14.0/x64/bin/node /opt/hostedtoolcache/node/24.14.0/x64/bin/node --heap-prof-interval=524288 --cpu-prof-interval=1000 --test-coverage-functions=0 --test-concurrency=0 --inspect-publish-uid=stderr,http --inspect-port=127.0.0.1:9229 --experimental-transform-types --report-signal=SIGUSR2 --test-coverage-lines=0 --test-isolation=process --conditions=source --tls-cipher-list=TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA est/*.test.ts (dns block)
- Triggering command: /opt/hostedtoolcache/node/24.14.0/x64/bin/node /opt/hostedtoolcache/node/24.14.0/x64/bin/node --heap-prof-interval=524288 --cpu-prof-interval=1000 --test-coverage-functions=0 --test-concurrency=0 --inspect-publish-uid=stderr,http --inspect-port=127.0.0.1:9229 --experimental-transform-types --report-signal=SIGUSR2 --test-coverage-lines=0 --test-isolation=process --conditions=source --tls-cipher-list=TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA est/*.test.ts --test-coverage-functions=0 s --inspect-publissh --inspect-port=1-c --experimental-tpnpm -r e2e sh (dns block)
- Triggering command: /opt/hostedtoolcache/node/24.14.0/x64/bin/node /opt/hostedtoolcache/node/24.14.0/x64/bin/node --heap-prof-interval=524288 --cpu-prof-interval=1000 --test-coverage-functions=0 --test-concurrency=0 --inspect-publish-uid=stderr,http --inspect-port=127.0.0.1:9229 --experimental-transform-types --report-signal=SIGUSR2 --test-coverage-lines=0 --test-isolation=process --conditions=source --tls-cipher-list=TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA est/*.test.ts --test-coverage-functions=0 odules/npm/node_modules/@npmcli/run-script/lib/node-gyp-bin/node --inspect-publissh --inspect-port=1-c --experimental-tpnpm -r e2e sh (dns block)
transport.opendata.ch
- Triggering command: /opt/hostedtoolcache/node/24.14.0/x64/bin/node /opt/hostedtoolcache/node/24.14.0/x64/bin/node --heap-prof-interval=524288 --cpu-prof-interval=1000 --test-coverage-functions=0 --test-concurrency=0 --inspect-publish-uid=stderr,http --inspect-port=127.0.0.1:9229 --experimental-transform-types --report-signal=SIGUSR2 --test-coverage-lines=0 --test-isolation=process --conditions=source --tls-cipher-list=TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA est/*.test.ts (dns block)
- Triggering command: /opt/hostedtoolcache/node/24.14.0/x64/bin/node /opt/hostedtoolcache/node/24.14.0/x64/bin/node --heap-prof-interval=524288 --cpu-prof-interval=1000 --test-coverage-functions=0 --test-concurrency=0 --inspect-publish-uid=stderr,http --inspect-port=127.0.0.1:9229 --experimental-transform-types --report-signal=SIGUSR2 --test-coverage-lines=0 --test-isolation=process --conditions=source --tls-cipher-list=TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA est/*.test.ts --test-coverage-functions=0 bin/ps --inspect-publissh --inspect-port=1-c --experimental-tpnpm -r e2e sh (dns block)
v6.db.api.bahn.guru
- Triggering command: /opt/hostedtoolcache/node/24.14.0/x64/bin/node /opt/hostedtoolcache/node/24.14.0/x64/bin/node --heap-prof-interval=524288 --cpu-prof-interval=1000 --test-coverage-functions=0 --test-concurrency=0 --inspect-publish-uid=stderr,http --inspect-port=127.0.0.1:9229 --experimental-transform-types --report-signal=SIGUSR2 --test-coverage-lines=0 --test-isolation=process --conditions=source --tls-cipher-list=TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA est/*.test.ts (dns block)
- Triggering command: /opt/hostedtoolcache/node/24.14.0/x64/bin/node /opt/hostedtoolcache/node/24.14.0/x64/bin/node --heap-prof-interval=524288 --cpu-prof-interval=1000 --test-coverage-functions=0 --test-concurrency=0 --inspect-publish-uid=stderr,http --inspect-port=127.0.0.1:9229 --experimental-transform-types --report-signal=SIGUSR2 --test-coverage-lines=0 --test-isolation=process --conditions=source --tls-cipher-list=TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA est/*.test.ts --test-coverage-functions=0 bin/ps --inspect-publissh --inspect-port=1-c --experimental-tpnpm -r e2e sh (dns block)

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changeset-bot · 2026-03-05T09:54:40Z

⚠️ No Changeset found

Latest commit: 025f5d4

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Co-authored-by: aarne <82001+aarne@users.noreply.github.com>

cloudflare-workers-and-pages · 2026-03-05T10:12:56Z

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	bridge	`025f5d4`	Commit Preview URL Branch Preview URL	Mar 05 2026, 10:18 AM

Co-authored-by: aarne <82001+aarne@users.noreply.github.com>

github-actions · 2026-03-05T10:23:13Z

Bencher Report

Branch	copilot/improve-test-coverage
Testbed	ubuntu-latest

Click to view all benchmark results

Benchmark	Latency	Benchmark Result nanoseconds (ns) (Result Δ%)	Upper Boundary nanoseconds (ns) (Limit %)
compiled: absolute baseline (passthrough, no tools)	📈 view plot 🚷 view threshold	0.00 ns (+2.36%) Baseline: 0.00 ns	0.00 ns (93.80%)
compiled: array + tool-per-element 10	📈 view plot 🚷 view threshold	0.01 ns (-1.17%) Baseline: 0.01 ns	0.01 ns (92.65%)
compiled: array + tool-per-element 100	📈 view plot 🚷 view threshold	0.03 ns (-2.18%) Baseline: 0.03 ns	0.04 ns (91.90%)
compiled: chained 3-tool fan-out	📈 view plot 🚷 view threshold	0.00 ns (+1.44%) Baseline: 0.00 ns	0.00 ns (94.33%)
compiled: flat array 10 items	📈 view plot 🚷 view threshold	0.01 ns (+0.20%) Baseline: 0.01 ns	0.01 ns (93.33%)
compiled: flat array 100 items	📈 view plot 🚷 view threshold	0.01 ns (-0.34%) Baseline: 0.01 ns	0.01 ns (93.97%)
compiled: flat array 1000 items	📈 view plot 🚷 view threshold	0.07 ns (-0.49%) Baseline: 0.07 ns	0.07 ns (94.74%)
compiled: nested array 10x10	📈 view plot 🚷 view threshold	0.02 ns (+0.58%) Baseline: 0.02 ns	0.02 ns (94.47%)
compiled: nested array 20x10	📈 view plot 🚷 view threshold	0.03 ns (-0.61%) Baseline: 0.03 ns	0.04 ns (93.82%)
compiled: nested array 5x5	📈 view plot 🚷 view threshold	0.01 ns (+0.21%) Baseline: 0.01 ns	0.01 ns (94.10%)
compiled: short-circuit (overdefinition bypass)	📈 view plot 🚷 view threshold	0.00 ns (+2.04%) Baseline: 0.00 ns	0.00 ns (93.63%)
compiled: simple chain (1 tool)	📈 view plot 🚷 view threshold	0.00 ns (+1.83%) Baseline: 0.00 ns	0.00 ns (93.41%)
exec: absolute baseline (passthrough, no tools)	📈 view plot 🚷 view threshold	0.00 ns (+6.51%) Baseline: 0.00 ns	0.00 ns (86.41%)
exec: array + tool-per-element 10	📈 view plot 🚷 view threshold	0.08 ns (+4.88%) Baseline: 0.08 ns	0.10 ns (78.19%)
exec: array + tool-per-element 100	📈 view plot 🚷 view threshold	0.74 ns (+9.04%) Baseline: 0.68 ns	0.94 ns (79.00%)
exec: chained 3-tool fan-out	📈 view plot 🚷 view threshold	0.02 ns (+14.98%) Baseline: 0.01 ns	0.02 ns (84.57%)
exec: flat array 10 items	📈 view plot 🚷 view threshold	0.01 ns (-8.44%) Baseline: 0.02 ns	0.04 ns (39.98%)
exec: flat array 100 items	📈 view plot 🚷 view threshold	0.08 ns (-23.65%) Baseline: 0.10 ns	0.32 ns (23.18%)
exec: flat array 1000 items	📈 view plot 🚷 view threshold	0.69 ns (-31.26%) Baseline: 1.00 ns	3.94 ns (17.41%)
exec: nested array 10x10	📈 view plot 🚷 view threshold	0.12 ns (-16.70%) Baseline: 0.15 ns	0.39 ns (31.12%)
exec: nested array 20x10	📈 view plot 🚷 view threshold	0.24 ns (-17.84%) Baseline: 0.29 ns	0.81 ns (29.60%)
exec: nested array 5x5	📈 view plot 🚷 view threshold	0.05 ns (-8.74%) Baseline: 0.05 ns	0.11 ns (43.65%)
exec: short-circuit (overdefinition bypass)	📈 view plot 🚷 view threshold	0.00 ns (+9.51%) Baseline: 0.00 ns	0.00 ns (96.82%)
exec: simple chain (1 tool)	📈 view plot 🚷 view threshold	0.01 ns (+11.70%) Baseline: 0.01 ns	0.01 ns (85.88%)
parse: large bridge (20 handles x 5 wires)	📈 view plot 🚷 view threshold	1.19 ns (+20.78%) Baseline: 0.99 ns	1.36 ns (87.74%)
parse: simple bridge	📈 view plot 🚷 view threshold	0.04 ns (+28.57%) Baseline: 0.03 ns	0.05 ns (90.36%)

🐰 View full continuous benchmarking report in Bencher

Initial plan

89c0472

Copilot AI assigned Copilot and aarne Mar 5, 2026

Copilot started work on behalf of aarne March 5, 2026 09:54 View session

test: add focused coverage tests for parser, codegen, core, and graphql

16f8f31

Co-authored-by: aarne <82001+aarne@users.noreply.github.com>

test: tighten diagnostics and execution tree assertions

025f5d4

Co-authored-by: aarne <82001+aarne@users.noreply.github.com>

Copilot AI changed the title ~~[WIP] Improve test coverage for bridge packages~~ Increase targeted coverage for parser, codegen, execution tree, and GraphQL transform edge paths Mar 5, 2026

Copilot finished work on behalf of aarne March 5, 2026 10:19

aarne marked this pull request as ready for review March 5, 2026 10:21

aarne merged commit be74193 into main Mar 5, 2026
13 of 14 checks passed

aarne deleted the copilot/improve-test-coverage branch March 5, 2026 10:26

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Increase targeted coverage for parser, codegen, execution tree, and GraphQL transform edge paths#92

Increase targeted coverage for parser, codegen, execution tree, and GraphQL transform edge paths#92
aarne merged 3 commits intomainfrom
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