test: added for Linear Search Algorithm

Search/LinearSearch.js

@@ -3,6 +3,8 @@
  * value within a list. It sequentially checks each element of the list
  * for the target value until a match is found or until all the elements
  * have been searched.
+ *
+ * [Reference](https://en.wikipedia.org/wiki/Linear_search)
  */
 function SearchArray(searchNum, ar, output = (v) => console.log(v)) {
   const position = Search(ar, searchNum)

Search/test/LinearSearch.test.js

@@ -0,0 +1,35 @@
+import { Search as linearSearch } from '../LinearSearch'
+
+const tests = [
+  {
+    test: {
+      arr: [1, 2, 300, 401, 450, 504, 800, 821, 855, 900, 1002],
+      target: 900
+    },
+    expectedValue: 9
+  },
+  {
+    test: {
+      arr: [1, 104, 110, 4, 44, 55, 56, 78],
+      target: 104
+    },
+    expectedValue: 1
+  },
+  {
+    test: {
+      arr: [-4, 5, 50, 77, 821, 85, 99, 100],
+      target: 192
+    },
+    expectedValue: -1
+  }
+]
+
+describe('Linear Search', () => {
+  it.each(tests)(
+    'linearSearch($test.arr, $test.target) => $expectedValue',
+    ({ test, expectedValue }) => {
+      const { arr, target } = test
+      expect(linearSearch(arr, target)).toBe(expectedValue)
+    }
+  )
+})