Add spec for getTodoStatus

tests/lib/get-todo-status-test.js

@@ -0,0 +1,23 @@
+const test = require('ava')
+const { getTodoStatus } = require('browser/lib/getTodoStatus')
+
+// Unit test
+test('getTodoStatus should return a correct hash object', t => {
+  // [input, expected]
+  const testCases = [
+    ['', { total: 0, completed: 0 }],
+    ['* [ ] a\n', { total: 1, completed: 0 }],
+    ['* [ ] a\n* [x] a\n', { total: 2, completed: 1 }],
+    ['- [ ] a\n', { total: 1, completed: 0 }],
+    ['- [ ] a\n- [x] a\n', { total: 2, completed: 1 }],
+    ['+ [ ] a\n', { total: 1, completed: 0 }],
+    ['+ [ ] a\n+ [x] a\n', { total: 2, completed: 1 }]
+  ]
+
+  testCases.forEach(testCase => {
+    const [input, expected] = testCase
+    t.is(getTodoStatus(input).total, expected.total, `Test for getTodoStatus() input: ${input} expected: ${expected.total}`)
+    t.is(getTodoStatus(input).completed, expected.completed, `Test for getTodoStatus() input: ${input} expected: ${expected.completed}`)
+  })
+})
+