Adding basic config file parsing and some test scaffolding.

__tests__/config.test.ts

@@ -0,0 +1,22 @@
+import { expect, test } from '@jest/globals'
+import { readConfigFile } from '../src/config'
+
+test('reads the config file', async () => {
+    var options = readConfigFile("./__tests__/fixtures/config-allow-sample.yml")
+    expect(options.fail_on_severity).toEqual('critical')
+    expect(options.allow_licenses).toEqual(['BSD', 'GPL 2'])
+})
+
+test('has a default config filepath', async () => {
+    expect(true).toEqual(true)
+})
+
+test('can read files with both extensions', async () => {
+    expect(true).toEqual(true)
+})
+
+test('returns a default config when the config file was not found', async () => {
+    var options = readConfigFile("fixtures/i-dont-exist")
+    expect(options.fail_on_severity).toEqual('all')
+    expect(options.allow_licenses).toEqual(['all'])
+})

__tests__/fixtures/config-allow-sample.yml

@@ -0,0 +1,4 @@
+fail_on_severity: critical
+allow_licenses:
+  - "BSD"
+  - "GPL 2"

__tests__/main.test.ts

@@ -1,5 +0,0 @@
-import {expect, test} from '@jest/globals'
-
-test('tests things', async () => {
-  expect(true).toEqual(true)
-})