test(commitlint): command assertions

Testing the commitlint command to make sure it's working as expected.
Tests include, validating correct and incorrect commit messages and log
output assertion.

Ref: #75

tests/commands/commitlint.spec.ts

@@ -0,0 +1,116 @@
+import {beforeEach, describe, expect, it, vi} from 'vitest';
+
+import {handler} from '../../src/commands/commitlint';
+import * as logger from '../../src/lib/logger';
+import * as sourceControl from '../../src/lib/source-control';
+import {Arguments} from 'yargs';
+
+declare module 'vitest' {
+  export interface TestContext {
+    commandResult?: number;
+  }
+}
+
+describe('command/commitlint', () => {
+  beforeEach(() => {
+    vi.spyOn(logger, 'log').mockImplementation(() => {});
+  });
+
+  describe('with all valid commit messages', () => {
+    beforeEach(async ctx => {
+      vi.spyOn(sourceControl, 'getSourceControlProvider').mockImplementation(
+        async () => ({
+          isEnabled: async () => true,
+          getBranchName: async () => 'feat/123',
+          root: async () => '/path/to/repo',
+          getCurrentCommitMessage: async () => 'feat: create the thing',
+          getCommits: async () => ['feat: correct', 'chore: another correct'],
+        }),
+      );
+
+      ctx.commandResult = await handler({_: [2, '']} as Arguments<
+        Record<string, never>
+      >);
+    });
+
+    it('returns correct exit code', ctx => {
+      expect(ctx.commandResult).toStrictEqual(0);
+    });
+
+    it('displays warnings', () => {
+      expect(logger.log).toHaveBeenCalledWith(
+        expect.stringContaining('references may not be empty'),
+      );
+    });
+  });
+
+  describe('with level set to 1', () => {
+    beforeEach(async ctx => {
+      vi.spyOn(sourceControl, 'getSourceControlProvider').mockImplementation(
+        async () => ({
+          isEnabled: async () => true,
+          getBranchName: async () => 'feat/123',
+          root: async () => '/path/to/repo',
+          getCurrentCommitMessage: async () => 'feat: create the thing',
+          getCommits: async () => ['feat: correct', 'chore: another correct'],
+        }),
+      );
+
+      ctx.commandResult = await handler({_: [1, '']} as Arguments<
+        Record<string, never>
+      >);
+    });
+
+    it('does not show warnings', ctx => {
+      expect(logger.log).not.toHaveBeenCalledWith(
+        expect.stringContaining('references may not be empty'),
+      );
+    });
+  });
+
+  describe('with invalid commit messages', () => {
+    beforeEach(async ctx => {
+      vi.spyOn(sourceControl, 'getSourceControlProvider').mockImplementation(
+        async () => ({
+          isEnabled: async () => true,
+          getBranchName: async () => 'feat/123',
+          root: async () => '/path/to/repo',
+          getCurrentCommitMessage: async () => 'feat: create the thing',
+          getCommits: async () => ['my first commit that is incorrect'],
+        }),
+      );
+
+      ctx.commandResult = await handler({_: [2, '']} as Arguments<
+        Record<string, never>
+      >);
+    });
+
+    it('returns correct exit code', ctx => {
+      expect(ctx.commandResult).toStrictEqual(2);
+    });
+
+    it('logs commit message', () => {
+      expect(logger.log).toHaveBeenCalledWith(
+        expect.stringContaining('my first commit that is incorrect'),
+      );
+    });
+
+    it('logs invalid subject error message', () => {
+      expect(logger.log).toHaveBeenCalledWith(
+        expect.stringContaining('subject may not be empty'),
+      );
+    });
+
+    it('logs invalid type error message', () => {
+      expect(logger.log).toHaveBeenCalledWith(
+        expect.stringContaining('type may not be empty'),
+      );
+    });
+
+    it('logs invalid references warning message', () => {
+      expect(logger.log).toHaveBeenCalledWith(
+        expect.stringContaining('references may not be empty'),
+      );
+    });
+  });
+});