Added unit tests for utils.compileETag to cover valid and invalid inputs

test/utils.js

@@ -80,3 +80,29 @@
       'W/"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk"')
   })
 })
+
+describe('utils.compileETag()', function () {
+  it('should return generateETag for true', function () {
+  const fn = utils.compileETag(true);
+  assert.strictEqual(typeof fn, 'function');
+  });
+
+  it('should return undefined for false', function () {
+  assert.strictEqual(utils.compileETag(false), undefined);
+  });
+
+  it('should return generateETag for string values "strong" and "weak"', function () {
+  assert.strictEqual(typeof utils.compileETag('strong'), 'function');
+  assert.strictEqual(typeof utils.compileETag('weak'), 'function');
+  });
+
+  it('should throw for unknown string values', function () {
+  assert.throws(() => utils.compileETag('foo'), TypeError);
+  });
+
+  it('should throw for unsupported types like arrays and objects', function () {
+  assert.throws(() => utils.compileETag([]), TypeError);
+  assert.throws(() => utils.compileETag({}), TypeError);
+  });
+
+  });