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tests/js/source-signal-coverage.test.js

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+const { describe, it } = require("node:test");
+const assert = require("node:assert/strict");
+const { scanWiki } = require("../../scripts/source-signal-coverage");
+const path = require("path");
+
+const FIXTURE_ROOT = path.join(__dirname, "..", "fixtures", "coverage-sample-wiki");
+
+describe("scanWiki", () => {
+  it("returns correct summary counts", () => {
+    const { summary } = scanWiki(FIXTURE_ROOT);
+    assert.equal(summary.ok, 2);
+    assert.equal(summary.missing_sources, 1);
+    assert.equal(summary.empty_sources, 1);
+    assert.equal(summary.invalid_sources, 1);
+    assert.equal(summary.not_applicable, 2);
+    assert.equal(summary.applicable_total, 5);
+  });
+
+  it("returns pages for all scanned files", () => {
+    const { pages } = scanWiki(FIXTURE_ROOT);
+    assert.equal(pages.length, 7);
+  });
+
+  it("marks synthesis as not_applicable", () => {
+    const { pages } = scanWiki(FIXTURE_ROOT);
+    const crystal = pages.find((p) => p.id === "Crystal");
+    assert.equal(crystal.reason, "not_applicable");
+  });
+
+  it("marks query as not_applicable", () => {
+    const { pages } = scanWiki(FIXTURE_ROOT);
+    const query = pages.find((p) => p.pageType === "query");
+    assert.equal(query.reason, "not_applicable");
+  });
+
+  it("detects ok with correct sourceCount", () => {
+    const { pages } = scanWiki(FIXTURE_ROOT);
+    const alpha = pages.find((p) => p.id === "Alpha");
+    assert.equal(alpha.reason, "ok");
+    assert.equal(alpha.sourceCount, 2);
+  });
+
+  it("detects invalid_sources", () => {
+    const { pages } = scanWiki(FIXTURE_ROOT);
+    const delta = pages.find((p) => p.id === "Delta");
+    assert.equal(delta.reason, "invalid_sources");
+  });
+});