Add jest config for coverage, unit tests for stubs to get coverage to 100

package.json

@@ -8,7 +8,7 @@
     "dev": "node src/server.js",
     "lint": "eslint .",
     "lint:fix": "eslint . --fix",
-    "test:unit": "jest --coverage"
+    "test:unit": "jest"
   },
   "dependencies": {
     "express": "^4.21.1",
@@ -20,5 +20,17 @@
     "globals": "^15.11.0",
     "jest": "^29.7.0",
     "supertest": "^7.0.0"
+  },
+  "jest": {
+    "collectCoverage": true,
+    "collectCoverageFrom": [
+      "**/*.js",
+      "!**/*.spec.js",
+      "!**/node_modules/**",
+      "!src/server.js",
+      "!coverage/**"
+    ],
+    "coverageReporters": ["html", "text-summary", "lcov"],
+    "coverageDirectory": "coverage"
   }
 }

src/data/dataLayer.spec.js

+const { getDbVersion, healthCheck, runMigrations } = require('../data/dataLayer');
+
+describe('Data', () => {
+    describe('runMigrations', () => {
+        it('is a stub', async () => {
+            await runMigrations();
+        });
+    });
+    describe('healthCheck', () => {
+        it('returns the stubbed out data', async () => {
+            const result = await healthCheck();
+            expect(result).toEqual({
+                healthy: true,
+                message: "Health check succeeded, but no database is deployed"
+            });
+        });
+    });
+    describe('getDbVersion', () => {
+        it('returns the stubbed out data', async () => {
+            const result = await getDbVersion();
+            expect(result).toEqual("no database deployed");
+        });
+    });
+});
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