From 2f65d04253b50737f2313be5ee88b662c9cde19e Mon Sep 17 00:00:00 2001
From: Andinus <andinus@nand.sh>
Date: Sat, 4 Sep 2021 23:07:40 +0530
Subject: JS: Hamming: Add solution

---
 javascript/hamming/hamming.spec.js | 47 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 javascript/hamming/hamming.spec.js

(limited to 'javascript/hamming/hamming.spec.js')

diff --git a/javascript/hamming/hamming.spec.js b/javascript/hamming/hamming.spec.js
new file mode 100644
index 0000000..de445d3
--- /dev/null
+++ b/javascript/hamming/hamming.spec.js
@@ -0,0 +1,47 @@
+import { compute } from './hamming';
+
+describe('Hamming', () => {
+  test('empty strands', () => {
+    expect(compute('', '')).toEqual(0);
+  });
+
+  test('single letter identical strands', () => {
+    expect(compute('A', 'A')).toEqual(0);
+  });
+
+  test('single letter different strands', () => {
+    expect(compute('G', 'T')).toEqual(1);
+  });
+
+  test('long identical strands', () => {
+    expect(compute('GGACTGAAATCTG', 'GGACTGAAATCTG')).toEqual(0);
+  });
+
+  test('long different strands', () => {
+    expect(compute('GGACGGATTCTG', 'AGGACGGATTCT')).toEqual(9);
+  });
+
+  test('disallow first strand longer', () => {
+    expect(() => compute('AATG', 'AAA')).toThrow(
+      new Error('left and right strands must be of equal length')
+    );
+  });
+
+  test('disallow second strand longer', () => {
+    expect(() => compute('ATA', 'AGTG')).toThrow(
+      new Error('left and right strands must be of equal length')
+    );
+  });
+
+  test('disallow left empty strand', () => {
+    expect(() => compute('', 'G')).toThrow(
+      new Error('left strand must not be empty')
+    );
+  });
+
+  test('disallow right empty strand', () => {
+    expect(() => compute('G', '')).toThrow(
+      new Error('right strand must not be empty')
+    );
+  });
+});
-- 
cgit 1.4.1-2-gfad0