feat: add unit tests

__tests__/KeyCommand/index.test.js

@@ -0,0 +1,48 @@
+import _ from 'underscore';
+// eslint-disable-next-line
+import * as Keycommand from '../../src/KeyCommand/index.js';
+
+const {
+    default: {
+        getConstants,
+        registerKeyCommands,
+        unregisterKeyCommands,
+        getRegisteredCommandIndex,
+    },
+} = Keycommand;
+
+const constants = getConstants();
+
+const commands = [
+    {input: constants.keyInputEscape},
+    {input: constants.keyInputEnter},
+    {input: constants.keyInputEscape, modifierFlags: constants.keyModifierCommand},
+    {input: constants.keyInputEnter, modifierFlags: constants.keyModifierCommand},
+    {input: constants.keyInputDownArrow, modifierFlags: constants.keyModifierCommand},
+];
+
+describe('KeyCommand getRegisteredCommandIndex', () => {
+    beforeAll(() => {
+        registerKeyCommands(commands);
+    });
+
+    afterAll(() => {
+        unregisterKeyCommands(commands);
+    });
+
+    it('should return correct command given that an exact match exists', () => {
+        _.map(commands, (command, index) => {
+            expect(getRegisteredCommandIndex(command)).toBe(index);
+        });
+
+        _.map([...commands].reverse(), (command, index) => {
+            expect(getRegisteredCommandIndex(command)).toBe(commands.length - 1 - index);
+        });
+    });
+
+    it('should return -1 if command does not exist', () => {
+        expect(getRegisteredCommandIndex({
+            input: constants.keyInputDownArrow,
+        })).toBe(-1);
+    });
+});