Implement validatePreconditions and validateTemplate for template validation

This commit is contained in:
2026-05-21 22:02:31 +00:00
parent 7a5bd2f513
commit 67907dc0f3
3 changed files with 447 additions and 6 deletions

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@@ -11,3 +11,4 @@ export {
validateGraph,
validate,
} from "../graph/validation.js";
export { validatePreconditions, validateTemplate } from "./workflow.js";

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@@ -1 +1,197 @@
export {};
import type { TSchema } from "@alkdev/typebox";
import { KindGuard } from "@alkdev/typebox";
import type { UNode } from "@alkdev/ujsx";
import { createHostRoot } from "@alkdev/ujsx";
import { hasCycle } from "graphology-dag";
import { DirectedGraph } from "graphology";
import type { FlowGraph } from "../graph/construction.js";
import type { OperationNodeAttrs } from "../schema/node.js";
import type { OperationEdgeAttrs } from "../schema/edge.js";
import type { ValidationError, AnyValidationError } from "../error/index.js";
import { GraphologyHostConfig } from "../host/graphology.js";
import { reachableFrom } from "../graph/queries.js";
function getRequiredTopLevelFields(schema: unknown): Set<string> {
const fields = new Set<string>();
if (schema === null || schema === undefined || typeof schema !== "object") return fields;
const s = schema as TSchema;
if (!KindGuard.IsObject(s)) return fields;
const props = s.properties as Record<string, TSchema> | undefined;
const required = s.required as string[] | undefined;
if (props && required) {
for (const key of required) {
fields.add(key);
}
}
return fields;
}
function getProvidedFields(schema: unknown): Set<string> {
const fields = new Set<string>();
if (schema === null || schema === undefined || typeof schema !== "object") return fields;
const s = schema as TSchema;
if (!KindGuard.IsObject(s)) return fields;
const props = s.properties as Record<string, TSchema> | undefined;
if (props) {
for (const key of Object.keys(props)) {
fields.add(key);
}
}
return fields;
}
export function validatePreconditions(
graph: FlowGraph<typeof import("../schema/node.js").OperationNodeAttrs, typeof import("../schema/edge.js").OperationEdgeAttrs>,
): ValidationError[] {
const errors: ValidationError[] = [];
const nodeKeys = graph.nodes();
for (const nodeKey of nodeKeys) {
const attrs = graph.getNodeAttributes(nodeKey) as unknown as OperationNodeAttrs;
const inputSchema = attrs.inputSchema;
const requiredFields = getRequiredTopLevelFields(inputSchema);
if (requiredFields.size === 0) continue;
const predecessors = graph.predecessors(nodeKey);
if (predecessors.length === 0) {
for (const field of requiredFields) {
errors.push({
type: "schema",
nodeKey,
field,
message: `Required input field "${field}" has no predecessor providing it`,
});
}
continue;
}
const providedFields = new Set<string>();
for (const predKey of predecessors) {
const predAttrs = graph.getNodeAttributes(predKey) as unknown as OperationNodeAttrs;
const predProvided = getProvidedFields(predAttrs.outputSchema);
for (const field of predProvided) {
providedFields.add(field);
}
}
for (const field of requiredFields) {
if (!providedFields.has(field)) {
errors.push({
type: "schema",
nodeKey,
field,
message: `Required input field "${field}" is not provided by any predecessor`,
});
}
}
}
return errors;
}
function collectOperationNodeKeys(dag: DirectedGraph): string[] {
const names: string[] = [];
dag.forEachNode((key) => {
if (!key.startsWith("__")) {
names.push(key);
}
});
return names;
}
export function validateTemplate(
template: UNode,
operationGraph: FlowGraph<typeof import("../schema/node.js").OperationNodeAttrs, typeof import("../schema/edge.js").OperationEdgeAttrs>,
): AnyValidationError[] {
const errors: AnyValidationError[] = [];
let renderedDag: DirectedGraph;
try {
const root = createHostRoot(GraphologyHostConfig, null);
root.render(template);
renderedDag = root.ctx.graph as DirectedGraph;
} catch {
renderedDag = new DirectedGraph();
}
const templateNodeKeys = collectOperationNodeKeys(renderedDag);
const graphNodeKeys = new Set(operationGraph.nodes());
for (const opKey of templateNodeKeys) {
if (!graphNodeKeys.has(opKey)) {
errors.push({
type: "graph",
category: "orphan-node",
details: { operation: opKey, message: `Operation "${opKey}" not found in operation graph` },
});
}
}
if (hasCycle(renderedDag)) {
errors.push({
type: "graph",
category: "cycle",
details: { message: "Rendered template DAG contains a cycle" },
});
}
for (const opKey of templateNodeKeys) {
if (!graphNodeKeys.has(opKey)) continue;
const outEdges = renderedDag.outEdges(opKey) ?? [];
for (const edge of outEdges) {
const target = renderedDag.target(edge);
if (target.startsWith("__")) continue;
if (!graphNodeKeys.has(target)) continue;
if (operationGraph.hasEdge(opKey, target)) {
const edgeAttrs = operationGraph.getEdgeAttributes(opKey, target) as unknown as OperationEdgeAttrs;
if (!edgeAttrs.compatible) {
errors.push({
type: "type-compat",
sourceKey: opKey,
targetKey: target,
compatible: false,
mismatches: edgeAttrs.mismatches ?? [],
});
}
}
}
}
if (templateNodeKeys.length > 1) {
const roots: string[] = [];
for (const key of templateNodeKeys) {
const inDegree = renderedDag.inDegree(key);
if (inDegree === 0) {
roots.push(key);
}
}
if (roots.length > 0) {
const reachable = reachableFrom(renderedDag, roots);
for (const nodeKey of templateNodeKeys) {
if (!reachable.has(nodeKey)) {
errors.push({
type: "graph",
category: "orphan-node",
details: { nodeKey, message: `Operation "${nodeKey}" is not reachable from start` },
});
}
}
}
}
for (const nodeKey of templateNodeKeys) {
const inDegree = renderedDag.inDegree(nodeKey);
const outDegree = renderedDag.outDegree(nodeKey);
if (inDegree === 0 && outDegree === 0 && templateNodeKeys.length > 1) {
errors.push({
type: "graph",
category: "orphan-node",
details: { nodeKey, message: `Operation "${nodeKey}" has no edges (orphan node)` },
});
}
}
return errors;
}

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@@ -1,7 +1,251 @@
import { describe, it, expect } from 'vitest';
import { describe, it, expect } from "vitest";
import { Type } from "@alkdev/typebox";
import { h, createHostRoot } from "@alkdev/ujsx";
import { Operation, Sequential, Parallel, Conditional } from "../../src/component/index.js";
import { validatePreconditions, validateTemplate } from "../../src/analysis/workflow.js";
import { FlowGraph } from "../../src/graph/construction.js";
import type { OperationNodeAttrs, OperationEdgeAttrs } from "../../src/schema/index.js";
describe('analysis workflow', () => {
it('placeholder', () => {
expect(true).toBe(true);
type OpGraph = FlowGraph<typeof import("../../src/schema/node.js").OperationNodeAttrs, typeof import("../../src/schema/edge.js").OperationEdgeAttrs>;
function createOperationGraph(
specs: Array<{
name: string;
namespace?: string;
inputSchema?: Record<string, unknown>;
outputSchema?: Record<string, unknown>;
}>,
): OpGraph {
const graph = new FlowGraph() as OpGraph;
for (const spec of specs) {
const ns = spec.namespace ?? "test";
const key = `${ns}.${spec.name}`;
graph.addNode(key, {
name: spec.name,
namespace: ns,
version: "1.0.0",
type: "query",
inputSchema: spec.inputSchema ?? Type.Object({}),
outputSchema: spec.outputSchema ?? Type.Object({}),
} as OperationNodeAttrs);
}
return graph;
}
function createOperationGraphWithEdges(
specs: Array<{
name: string;
namespace?: string;
inputSchema?: Record<string, unknown>;
outputSchema?: Record<string, unknown>;
}>,
edges?: Array<{ source: string; target: string; compatible: boolean; mismatches?: Array<{ path: string; expected: string; actual: string }> }>,
): OpGraph {
const graph = createOperationGraph(specs);
if (edges) {
for (const edge of edges) {
graph.addTypedEdge(edge.source, edge.target, {
compatible: edge.compatible,
mismatches: edge.mismatches,
});
}
}
return graph;
}
describe("validatePreconditions", () => {
it("returns empty for valid graph with no required fields", () => {
const graph = createOperationGraph([
{ name: "a", outputSchema: Type.Object({ x: Type.Number() }) },
{ name: "b", inputSchema: Type.Object({}) },
]);
graph.addEdge("test.a", "test.b");
const errors = validatePreconditions(graph);
expect(errors).toEqual([]);
});
it("returns empty when all required input fields are provided by predecessors", () => {
const graph = createOperationGraph([
{ name: "a", outputSchema: Type.Object({ x: Type.Number(), y: Type.String() }) },
{ name: "b", inputSchema: Type.Object({ x: Type.Number() }) },
]);
graph.addEdge("test.a", "test.b");
const errors = validatePreconditions(graph);
expect(errors).toEqual([]);
});
it("returns errors when required input field is not provided by any predecessor", () => {
const graph = createOperationGraph([
{ name: "a", outputSchema: Type.Object({ x: Type.Number() }) },
{ name: "b", inputSchema: Type.Object({ x: Type.Number(), y: Type.String() }) },
]);
graph.addEdge("test.a", "test.b");
const errors = validatePreconditions(graph);
expect(errors.length).toBeGreaterThan(0);
const fieldNames = errors.map((e) => e.field);
expect(fieldNames).toContain("y");
});
it("returns errors when node with required fields has no predecessors", () => {
const graph = createOperationGraph([
{ name: "a", inputSchema: Type.Object({ x: Type.Number() }), outputSchema: Type.Object({}) },
]);
const errors = validatePreconditions(graph);
expect(errors.length).toBeGreaterThan(0);
expect(errors[0]!.message).toContain("no predecessor");
});
it("collects provided fields from multiple predecessors", () => {
const graph = createOperationGraph([
{ name: "a", outputSchema: Type.Object({ x: Type.Number() }) },
{ name: "c", outputSchema: Type.Object({ y: Type.String() }) },
{ name: "b", inputSchema: Type.Object({ x: Type.Number(), y: Type.String() }) },
]);
graph.addEdge("test.a", "test.b");
graph.addEdge("test.c", "test.b");
const errors = validatePreconditions(graph);
expect(errors).toEqual([]);
});
it("returns empty for graph with no nodes", () => {
const graph = new FlowGraph() as OpGraph;
const errors = validatePreconditions(graph);
expect(errors).toEqual([]);
});
});
describe("validateTemplate", () => {
it("returns empty for valid template with all operations in graph", () => {
const graph = createOperationGraphWithEdges([
{ name: "a", outputSchema: Type.Object({ x: Type.Number() }) },
{ name: "b", inputSchema: Type.Object({ x: Type.Number() }) },
], [
{ source: "test.a", target: "test.b", compatible: true },
]);
const template = h(Sequential, {},
h(Operation, { name: "test.a" }),
h(Operation, { name: "test.b" }),
);
const errors = validateTemplate(template, graph);
expect(errors).toEqual([]);
});
it("returns error when operation name is not in operation graph", () => {
const graph = createOperationGraph([
{ name: "a" },
]);
const template = h(Sequential, {},
h(Operation, { name: "test.a" }),
h(Operation, { name: "test.missing" }),
);
const errors = validateTemplate(template, graph);
expect(errors.length).toBeGreaterThan(0);
const missingErrors = errors.filter(
(e) => e.type === "graph" && (e as { type: string; category: string; details: unknown }).category === "orphan-node"
&& JSON.stringify((e as { details: unknown }).details).includes("missing"),
);
expect(missingErrors.length).toBeGreaterThan(0);
});
it("returns error for type incompatibility between sequential operations", () => {
const graph = createOperationGraphWithEdges([
{ name: "a", outputSchema: Type.Object({ x: Type.String() }) },
{ name: "b", inputSchema: Type.Object({ x: Type.Number() }) },
], [
{ source: "test.a", target: "test.b", compatible: false, mismatches: [{ path: "/x", expected: "number", actual: "string" }] },
]);
const template = h(Sequential, {},
h(Operation, { name: "test.a" }),
h(Operation, { name: "test.b" }),
);
const errors = validateTemplate(template, graph);
const typeErrors = errors.filter((e) => e.type === "type-compat");
expect(typeErrors.length).toBeGreaterThan(0);
});
it("returns empty for single-operation template", () => {
const graph = createOperationGraph([
{ name: "a" },
]);
const template = h(Operation, { name: "test.a" });
const errors = validateTemplate(template, graph);
expect(errors).toEqual([]);
});
it("detects unreachable nodes", () => {
const graph = createOperationGraphWithEdges([
{ name: "a" },
{ name: "b" },
{ name: "c" },
]);
const template = h(Sequential, {},
h(Operation, { name: "test.a" }),
h(Operation, { name: "test.b" }),
);
const errors = validateTemplate(template, graph);
const reachableErrors = errors.filter(
(e) => e.type === "graph" && JSON.stringify((e as { details: unknown }).details).includes("not reachable"),
);
expect(reachableErrors.length).toBe(0);
});
it("returns empty for valid parallel template", () => {
const graph = createOperationGraphWithEdges([
{ name: "a" },
{ name: "b" },
{ name: "c" },
]);
const template = h(Sequential, {},
h(Operation, { name: "test.a" }),
h(Parallel, {},
h(Operation, { name: "test.b" }),
h(Operation, { name: "test.c" }),
),
);
const errors = validateTemplate(template, graph);
expect(errors).toEqual([]);
});
it("handles template with conditional", () => {
const graph = createOperationGraphWithEdges([
{ name: "a", outputSchema: Type.Object({ result: Type.Boolean() }) },
{ name: "b" },
{ name: "c" },
]);
const template = h(Sequential, {},
h(Operation, { name: "test.a" }),
h(Conditional, { test: "test.a" },
h(Operation, { name: "test.b" }),
),
h(Operation, { name: "test.c" }),
);
const errors = validateTemplate(template, graph);
expect(errors).toEqual([]);
});
it("template validation is advisory - never throws", () => {
const graph = new FlowGraph() as OpGraph;
const template = h(Sequential, {},
h(Operation, { name: "nonexistent" }),
);
const errors = validateTemplate(template, graph);
expect(Array.isArray(errors)).toBe(true);
});
it("detects orphan node with no edges in multi-node template", () => {
const graph = createOperationGraphWithEdges([
{ name: "a" },
{ name: "b" },
]);
const template = h(Parallel, {},
h(Operation, { name: "test.a" }),
h(Operation, { name: "test.b" }),
);
const errors = validateTemplate(template, graph);
const orphanErrors = errors.filter(
(e) => e.type === "graph" && (e as { type: string; category: string }).category === "orphan-node"
&& JSON.stringify((e as { details: unknown }).details).includes("no edges"),
);
expect(orphanErrors.length).toBeGreaterThan(0);
});
});