Refactor action to typescript (#226)

* Refactor to typescript (config part)

* Refactor to typescript (convert extensions, minor fixes)

* Refactor to typescript (move from `action` to `dist`)

* Re-enable integrity-check for dist index.js

* Fix all tests and lints

* fix parsing major versions

* Test patch level to be digits only

* debug

* debug

* uncache

* manual compile

* debug

* debug

* Debug

* Build lib - doh

* remove diff check

* Make kubernetes workflow manual

* Properly generate 3 digit for simple major tags

* Remove ts-ignore

* re-enable cache

src/model/system.test.ts

@@ -0,0 +1,57 @@
+import * as core from '@actions/core';
+import System from './system';
+
+jest.spyOn(core, 'debug').mockImplementation(() => {});
+const info = jest.spyOn(core, 'info').mockImplementation(() => {});
+jest.spyOn(core, 'warning').mockImplementation(() => {});
+jest.spyOn(core, 'error').mockImplementation(() => {});
+
+afterEach(() => {
+  jest.clearAllMocks();
+});
+
+describe('System', () => {
+  describe('run', () => {
+    it('runs a command successfully', async () => {
+      await expect(System.run('true')).resolves.not.toBeNull();
+    });
+
+    it('outputs results', async () => {
+      await expect(System.run('echo test')).resolves.toStrictEqual('test\n');
+    });
+
+    it('throws on when error code is not 0', async () => {
+      await expect(System.run('false')).rejects.toThrowError();
+    });
+
+    it('throws when no arguments are given', async () => {
+      await expect(System.run('')).rejects.toThrowError();
+    });
+
+    it('outputs info', async () => {
+      await expect(System.run('echo test')).resolves.not.toBeNull();
+      expect(info).toHaveBeenLastCalledWith('test\n');
+    });
+
+    it('outputs info only once', async () => {
+      await expect(System.run('echo 1')).resolves.not.toBeNull();
+      expect(info).toHaveBeenCalledTimes(1);
+      expect(info).toHaveBeenLastCalledWith('1\n');
+
+      info.mockClear();
+      await expect(System.run('echo 2')).resolves.not.toBeNull();
+      await expect(System.run('echo 3')).resolves.not.toBeNull();
+      expect(info).toHaveBeenCalledTimes(2);
+      expect(info).toHaveBeenLastCalledWith('3\n');
+    });
+
+    it('allows pipes using buffer', async () => {
+      await expect(
+        System.run('sh', undefined, {
+          input: Buffer.from('git tag --list --merged HEAD | grep v[0-9]* | wc -l'),
+          // eslint-disable-next-line github/no-then
+        }).then((result) => Number(result)),
+      ).resolves.not.toBeNaN();
+    });
+  });
+});