feat: complete TASK-WP3-01 model configuration

tests/unit/wp3-01-model-config-validator.test.ts

@@ -0,0 +1,56 @@
+import { describe, expect, it } from "vitest";
+
+import {
+  ModelConfigurationError,
+  modelIds,
+  validateModelConfigurationCandidateSet,
+  type ModelConfigCandidate,
+} from "../../apps/api/src/model-configuration.js";
+
+function candidateSet(): ModelConfigCandidate[] {
+  return modelIds.map((modelId, index) => ({
+    model_id: modelId,
+    display_name: modelId,
+    enabled: true,
+    is_default: index === 0,
+    recommendation_priority: index + 1,
+    route_profile: { endpoint: "https://mock.invalid/v1/images" },
+    gateway_account_ref: "mock-gateway",
+    error_mapping_profile: { timeout: "upstream_timeout" },
+    credit_cost: 1,
+    supported_ratios: ["3:4", "1:1", "4:3", "9:16"],
+    reference_limits: { max_file_bytes: 1_024, max_files: 2, max_total_bytes: 2_048 },
+    prompt_max_length: 1_000,
+    safety_source: "provider",
+  }));
+}
+
+describe("TDD-WP3-MDL-002 invalid full configuration sets", () => {
+  it.each([
+    ["missing", undefined],
+    ["fractional", 1.5],
+    ["zero", 0],
+    ["negative", -1],
+  ])("rejects a %s recommendation priority", (_name, value) => {
+    const models = candidateSet();
+    models[1].recommendation_priority = value as number;
+    expect(() => validateModelConfigurationCandidateSet(models)).toThrowError(
+      expect.objectContaining({ code: "MODEL_RECOMMENDATION_PRIORITY_INVALID" }),
+    );
+  });
+
+  it("rejects duplicate priorities", () => {
+    const models = candidateSet();
+    models[1].recommendation_priority = models[0].recommendation_priority;
+    expect(() => validateModelConfigurationCandidateSet(models)).toThrowError(
+      expect.objectContaining({ code: "MODEL_RECOMMENDATION_PRIORITY_CONFLICT" }),
+    );
+  });
+
+  it.each(["missing model", "unknown model"])("rejects a candidate with a %s", (scenario) => {
+    const models = candidateSet();
+    if (scenario === "missing model") models.pop();
+    else models[2].model_id = "unknown-model";
+    expect(() => validateModelConfigurationCandidateSet(models)).toThrowError(ModelConfigurationError);
+  });
+});