Cleanup error classes and CI

__tests__/GithubErrorDetail.test.ts

@@ -0,0 +1,98 @@
+import { GithubErrorDetail } from "../src/GithubErrorDetail"
+
+describe('GithubErrorDetail', () => {
+
+    it('provides error code', () => {
+        const error = {
+            code: "missing"
+        }
+
+        const detail = new GithubErrorDetail(error)
+
+        expect(detail.code).toBe('missing')
+    })
+
+    it('generates missing resource error message', () => {
+        const resource = "release"
+        const error = {
+            code: "missing",
+            resource: resource
+        }
+
+        const detail = new GithubErrorDetail(error)
+        const message = detail.toString()
+
+        expect(message).toBe(`${resource} does not exist.`)
+    })
+
+    it('generates missing field error message', () => {
+        const resource = "release"
+        const field = "body"
+        const error = {
+            code: "missing_field",
+            field: field,
+            resource: resource
+        }
+
+        const detail = new GithubErrorDetail(error)
+        const message = detail.toString()
+
+        expect(message).toBe(`The ${field} field on ${resource} is missing.`)
+    })
+
+    it('generates invalid field error message', () => {
+        const resource = "release"
+        const field = "body"
+        const error = {
+            code: "invalid",
+            field: field,
+            resource: resource
+        }
+
+        const detail = new GithubErrorDetail(error)
+        const message = detail.toString()
+
+        expect(message).toBe(`The ${field} field on ${resource} is an invalid format.`)
+    })
+
+    it('generates resource already exists error message', () => {
+        const resource = "release"
+        const error = {
+            code: "already_exists",
+            resource: resource
+        }
+
+        const detail = new GithubErrorDetail(error)
+        const message = detail.toString()
+
+        expect(message).toBe(`${resource} already exists.`)
+    })
+
+    describe('generates custom error message', () => {
+        it('with documentation url', () => {
+            const url = "https://api.example.com"
+            const error = {
+                code: "custom",
+                message: "foo",
+                documentation_url: url
+            }
+
+            const detail = new GithubErrorDetail(error)
+            const message = detail.toString()
+
+            expect(message).toBe(`foo\nPlease see ${url}.`)
+        })
+
+        it('without documentation url', () => {
+            const error = {
+                code: "custom",
+                message: "foo"
+            }
+
+            const detail = new GithubErrorDetail(error)
+            const message = detail.toString()
+
+            expect(message).toBe('foo')
+        })
+    })
+})