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Merged
ashokdey merged 1 commit into from
Sep 7, 2019
Merged

BinarySearch test #5

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41 changes: 41 additions & 0 deletions src/Searching/BinarySearch/BinarySearch.test.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,41 @@
const { binarySearch, binarySearchRecursive } = require('.');

describe('Binary Search', () => {
const array = [1, 2, 3, 4, 5, 6, 7, 8];
const low = 0;
const high = array.length - 1;

describe('When element to find is at 1st position ', () => {
it('Binary search with Loop', () => {
expect(binarySearch(array, 1)).toEqual(0);
});
it('Binary serach with recursion', () => {
expect(binarySearchRecursive(array, low, high, 1)).toEqual(0);
});
});
describe('When element to find is at last position ', () => {
it('Binary search with Loop', () => {
expect(binarySearch(array, 7)).toEqual(6);
});
it('Binary serach with recursion', () => {
expect(binarySearchRecursive(array, low, high, 7)).toEqual(6);
});
});
describe('When element to find is at random position ', () => {
it('Binary search with Loop', () => {
expect(binarySearch(array, 3)).toEqual(2);
});
it('Binary serach with recursion', () => {
expect(binarySearchRecursive(array, low, high, 3)).toEqual(2);
});
});
describe('When element to find is no present in array ', () => {
it('Binary search with Loop', () => {
expect(binarySearch(array, 10)).toEqual(null);
});
it('Binary serach with recursion', () => {
expect(binarySearchRecursive(array, low, high, 10)).toEqual(null);
});
});

});
5 changes: 5 additions & 0 deletions src/Searching/BinarySearch/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -33,3 +33,8 @@ function binarySearchRecursive(arr, low, high, key) {
return binarySearchRecursive(arr, mid + 1, high, key);
}
}

module.exports = {
binarySearch,
binarySearchRecursive,
};