fix(javascript): bound semantic unknown retention at projection

Admit unknowns before canonical construction and provenance interning. Offer independent per-file and application capacities through CLI, Evidence and the owned analysis worker, and reject over-allocation during streamed decoding.

Report examined omitted emission occurrences by family and reason without retaining discarded identities. Preserve omission-free graph identities and distinguish node truncation from overall partial coverage.

Fixes #4797
This commit is contained in:
morluto
2026-10-17 21:57:31 +08:00
parent 926e18b3fc
commit f4322b15ed
34 changed files with 892 additions and 293 deletions
@@ -0,0 +1,243 @@
import { createHash } from "node:crypto";
import { expect, it } from "vitest";
import type { JavaScriptArtifactFile } from "../../domain/javascript/javascriptArtifactFiles.js";
import { analyzeJavaScriptSemantics } from "../../domain/javascript/javascriptSemanticAnalysis.js";
import {
javaScriptSemanticGraphSchema,
createJavaScriptSemanticGraph,
} from "../../domain/javascript/javascriptSemanticGraph.js";
import { queryJavaScriptSemanticGraph } from "../../domain/javascript/javascriptSemanticQuery.js";
import {
createJavaScriptSemanticGraphProjection,
projectJavaScriptSemanticFileSteps,
} from "./JavaScriptSemanticGraphBuilder.js";
import {
createSemanticGraphProjectionState,
addSemanticGraphUnknown,
} from "./JavaScriptSemanticGraphConstruction.js";
import { unknownSemanticEvidence } from "./JavaScriptSemanticGraphEvidence.js";
const digest = "a".repeat(64);
const application = { graph_id: `jag_${"b".repeat(64)}`, nodes: [] };
const text = "globalThis.u.p(globalThis.v[k]);\n".repeat(4);
const source = (path = "app.js", value = text): JavaScriptArtifactFile => ({
path,
sha256: createHash("sha256").update(value).digest("hex"),
container_sha256: digest,
bytes: Buffer.byteLength(value),
inventory_artifact_id: `art_${digest}`,
kind: "javascript",
unpacked: false,
text: { included: true, value },
});
const fileProjection = (file = source(), nodes = 200, unknowns = 200) => {
if (!file.text.included) throw new Error("Expected inert source");
const steps = projectJavaScriptSemanticFileSteps(
file,
analyzeJavaScriptSemantics(file.text.value),
{ nodes, unknowns },
);
let step = steps.next();
while (!step.done) step = steps.next();
return step.value;
};
it("bounds unknowns independently of retained nodes and accounts for examined omissions", () => {
const complete = fileProjection();
const bounded = fileProjection(source(), 200, 2);
expect(complete.unknowns.length).toBeGreaterThan(2);
expect(bounded.nodes).toEqual(complete.nodes);
expect(bounded.relations).toEqual(complete.relations);
expect(bounded.unknowns).toHaveLength(2);
expect(
bounded.omittedUnknownOccurrences!.reduce(
(sum, row) => sum + row.occurrences,
0,
),
).toBe(complete.unknowns.length - 2);
const projection = createJavaScriptSemanticGraphProjection({
totalUnknowns: 2,
fileUnknowns: 2,
});
projection.adoptFileProjection(bounded);
const graph = projection.finish(digest, application);
expect(graph.coverage).toMatchObject({
truncated: true,
status: "partial",
omitted_nodes: 0,
});
expect(graph.coverage.limits).toEqual(
expect.arrayContaining([
{ name: "semantic_graph_unknown_ceiling", value: 2, unit: "items" },
{ name: "semantic_graph_file_unknown_ceiling", value: 2, unit: "items" },
]),
);
expect(javaScriptSemanticGraphSchema.parse(graph)).toEqual(graph);
expect(
queryJavaScriptSemanticGraph(graph, {
seed: { kind: "property", name: "missing" },
direction: "backward-provenance",
}),
).toMatchObject({ status: "partial", coverage: { status: "partial" } });
});
it("keeps unknowns bounded even after their semantic nodes are dropped", () => {
const projection = fileProjection(source(), 1, 2);
expect(projection.nodesTruncated).toBe(true);
expect(projection.nodes).toHaveLength(1);
expect(projection.unknowns).toHaveLength(2);
expect(projection.omittedUnknownOccurrences!.length).toBeGreaterThan(0);
});
it("enforces per-file and total unknown capacities across transferred files", () => {
const projection = createJavaScriptSemanticGraphProjection({
totalUnknowns: 3,
fileUnknowns: 2,
});
for (const path of ["a.js", "b.js", "c.js"]) {
const capacity = projection.remainingFileCapacity();
const file = source(path);
const steps = projectJavaScriptSemanticFileSteps(
file,
analyzeJavaScriptSemantics(text),
capacity,
);
let step = steps.next();
while (!step.done) step = steps.next();
projection.adoptFileProjection(step.value);
}
expect(projection.remainingFileCapacity().unknowns).toBe(0);
const graph = projection.finish(digest, application);
expect(graph.unknowns).toHaveLength(3);
expect(
graph.unknowns.filter(
(row) =>
row.evidence.location.available &&
row.evidence.location.value.kind === "source-range" &&
row.evidence.location.value.source === "a.js",
),
).toHaveLength(2);
expect(
graph.coverage.omitted_unknown_occurrences!.reduce(
(sum, row) => sum + row.occurrences,
0,
),
).toBe(fileProjection().unknowns.length * 3 - 3);
});
it("rejects excess transferred unknowns before adopting any file facts", () => {
const projection = createJavaScriptSemanticGraphProjection({
totalUnknowns: 1,
fileUnknowns: 1,
});
const before = projection.remainingFileCapacity();
expect(() => projection.adoptFileProjection(fileProjection())).toThrow(
"Transferred semantic unknowns exceed",
);
expect(projection.remainingFileCapacity()).toEqual(before);
});
it("bounds unavailable-file frontiers through the same owner", () => {
const projection = createJavaScriptSemanticGraphProjection({
totalUnknowns: 2,
fileUnknowns: 2,
});
projection.recordUnavailableFile(
source(),
"Source unavailable",
null,
"incomplete-module",
);
const graph = projection.finish(digest, application);
expect(graph.unknowns).toHaveLength(2);
expect(
graph.coverage.omitted_unknown_occurrences!.reduce(
(sum, row) => sum + row.occurrences,
0,
),
).toBe(10);
});
it("does not intern omitted provenance and counts repeated omitted emissions as occurrences", () => {
const state = createSemanticGraphProjectionState();
state.unknownCapacity = 1;
const file = source();
for (const detail of ["retained", "omitted", "omitted"])
addSemanticGraphUnknown(state, {
node_id: null,
family: "data-flow",
relation_kinds: ["defines"],
reason: "unknown-value",
detail,
candidate_node_ids: [],
evidence: {
...unknownSemanticEvidence(file, null),
limitations: [detail],
},
});
expect(state.unknowns.size).toBe(1);
expect(state.evidenceContexts.contexts).toHaveLength(1);
expect([...state.unknownOmissions.values()]).toEqual([
{ family: "data-flow", reason: "unknown-value", occurrences: 2 },
]);
});
it("preserves omission-free graph identity and refuses contradictory omission coverage", () => {
const projection = createJavaScriptSemanticGraphProjection();
projection.adoptFileProjection(fileProjection());
const graph = projection.finish(digest, application);
expect(Object.hasOwn(graph.coverage, "omitted_unknown_occurrences")).toBe(
false,
);
const { graph_id: _id, ...input } = graph;
expect(createJavaScriptSemanticGraph(input).graph_id).toBe(graph.graph_id);
const omission = {
family: "data-flow",
reason: "unknown-value",
occurrences: 1,
};
expect(() =>
createJavaScriptSemanticGraph({
...input,
coverage: { ...graph.coverage, omitted_unknown_occurrences: [omission] },
}),
).toThrow("Omitted unknown occurrences require");
expect(() =>
createJavaScriptSemanticGraph({
...input,
coverage: {
...graph.coverage,
status: "partial",
truncated: true,
limits: [{ name: "authored", value: 1, unit: "items" }],
omitted_unknown_occurrences: [omission, omission],
},
}),
).toThrow("Unknown omission coverage");
});
it("applies the same unknown admission in direct and transferred construction", () => {
const direct = createJavaScriptSemanticGraphProjection({
totalUnknowns: 3,
fileUnknowns: 2,
});
const transferred = createJavaScriptSemanticGraphProjection({
totalUnknowns: 3,
fileUnknowns: 2,
});
for (const name of ["a.js", "b.js"]) {
const file = source(name);
direct.projectFile(file, analyzeJavaScriptSemantics(text));
const steps = projectJavaScriptSemanticFileSteps(
file,
analyzeJavaScriptSemantics(text),
transferred.remainingFileCapacity(),
);
let step = steps.next();
while (!step.done) step = steps.next();
transferred.adoptFileProjection(step.value);
}
expect(direct.finish(digest, application)).toEqual(
transferred.finish(digest, application),
);
});