Initial curated CertScope source from fe2bbe3ca5c98bf64be26a09c6c58ee805a7f87e

lib/inspect/score.test.ts

@@ -0,0 +1,43 @@
+import { describe, expect, it } from "vitest";
+import { score } from "./score";
+import type { Finding } from "./types";
+
+const finding = (impact: number, category: Finding["category"] = "http"): Finding => ({
+  id: `${category}-${impact}`,
+  category,
+  severity: "warning",
+  title: "test",
+  summary: "test",
+  evidence: [],
+  scoreImpact: impact,
+});
+
+describe("score", () => {
+  it("uses an equal-weighted aggregate of category scores", () => {
+    expect(score([finding(-18, "dns"), finding(-20, "tls"), finding(-22, "http")])).toEqual({
+      overall: 80,
+      deductions: 20,
+      categories: { dns: 82, tls: 80, http: 78 },
+    });
+  });
+
+  it("does not charge category deductions a second time globally", () => {
+    expect(score([finding(-8), finding(-6, "tls")])).toEqual({
+      overall: 95,
+      deductions: 5,
+      categories: { dns: 100, tls: 94, http: 92 },
+    });
+  });
+
+  it("rounds and clamps category and overall scores", () => {
+    expect(score([finding(-200, "dns"), finding(-200, "tls"), finding(-200, "http")])).toEqual({
+      overall: 0,
+      deductions: 100,
+      categories: { dns: 0, tls: 0, http: 0 },
+    });
+  });
+
+  it("ignores positive or non-finite score impacts", () => {
+    expect(score([finding(20, "dns"), finding(Number.NaN, "tls")]).overall).toBe(100);
+  });
+});