Add code coverage with 100% threshold (#56)

Author: drebrez

.github/workflows/ci.yml

@@ -88,3 +88,17 @@ jobs:
       - run: yarn lint
       - run: yarn build
       - run: yarn jest
+
+      - name: Code Coverage Summary Report
+        uses: irongut/CodeCoverageSummary@v1.3.0
+        with:
+          filename: coverage/cobertura-coverage.xml
+          format: markdown
+          output: both
+
+      - name: Add Coverage PR Comment
+        uses: marocchino/sticky-pull-request-comment@v2
+        if: github.event_name == 'pull_request'
+        with:
+          recreate: true
+          path: code-coverage-results.md

CHANGELOG.md

@@ -15,6 +15,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### dependabot: \#49 Bump cross-spawn from 7.0.3 to 7.0.6
 
+### Added
+
+- Code coverage with 100% threshold
+
 ## [1.2.0] - 2025-01-13
 
 ### Added

jest.config.js

@@ -4,4 +4,14 @@ module.exports = {
   testEnvironment: "node",
   resetMocks: false,
   setupFiles: ["jest-localstorage-mock"],
+  collectCoverage: true,
+  coverageReporters: ["text", "html", "cobertura"],
+  coverageThreshold: {
+    global: {
+      branches: 100,
+      functions: 100,
+      lines: 100,
+      statements: 100,
+    },
+  },
 };

src/lib/localStorage.spec.ts

@@ -6,6 +6,15 @@ describe("localStorage tests", () => {
     jest.clearAllMocks();
   });
 
+  test("localStorage not supported", () => {
+    const { localStorage } = global;
+    delete (global as Partial<typeof global>).localStorage;
+    expect(() => {
+      getLocalStorageItem("test");
+    }).toThrow("localStorage not supported");
+    global.localStorage = localStorage;
+  });
+
   test("getLocalStorageItem not existing", () => {
     expect(getLocalStorageItem("test")).toBeUndefined();
   });

src/lib/object.spec.ts

@@ -26,6 +26,11 @@ describe("object tests", () => {
   });
 
   test.each([
+    // Invalid objects
+    [null as unknown as object, null],
+    [undefined as unknown as object, undefined],
+
+    // Valid objects
     [{}, {}],
     [{ hello: "world" }, { hello: "world" }],
     [{ hello: null }, {}],

src/lib/string.ts

@@ -17,7 +17,7 @@ export function isNullOrEmpty(value?: string): boolean {
  * @returns true if the value parameter is null/undefined, Empty, or if value consists exclusively of white-space characters
  */
 export function isNullOrWhitespace(value?: string): boolean {
-  return isNullOrEmpty(value) || (value ?? "").trim().length === 0;
+  return isNullOrEmpty(value) || (value as string).trim().length === 0;
 }
 
 /**