Default Routing for isDefault Ring (#427)

- When a ring is marked as `isDefault: true`, `spk hld reconcile` will now
  generate an additional IngressRoute and Middleware.
  - The IngressRoute will not have a `Ring` route match rule
  - The IngressRoute points to the same backend service as its ringed
    counterpart.
  - Only one ring can be marked `isDefault: true` -- validation is run at
    `spk hld reconcile` execute time, throwing an error if more than one
    `isDefault`.
- Refactored IngressRoute tests
- Added compatibility configuration for eslint and prettier.

closes microsoft/bedrock#1084

jest.config.js

@@ -1,4 +1,5 @@
 module.exports = {
-  preset: 'ts-jest',
-  testEnvironment: 'node',
-};
+  preset: "ts-jest",
+  testEnvironment: "node",
+  rootDir: "src"
+};

src/commands/hld/reconcile-unit.test.ts

@@ -0,0 +1,151 @@
+import * as fs from "fs";
+import * as mocks from "../../test/mockFactory";
+import { BedrockFile } from "../../types";
+import * as reconcile from "./reconcile";
+
+jest.mock("fs");
+
+beforeEach(() => {
+  jest.resetAllMocks();
+});
+
+describe("createMiddlewareForRing", () => {
+  const tests: {
+    name: string;
+    actual: () => unknown;
+    expected: unknown;
+    effects?: (() => void)[];
+  }[] = [
+    {
+      name: "isDefault === false; creates one (1) middleware",
+      actual: (): unknown =>
+        reconcile.createMiddlewareForRing(
+          "path-to-ring",
+          "my-service",
+          "my-ring",
+          "v1",
+          false
+        ),
+      expected: { ringed: expect.anything(), default: undefined },
+      effects: [
+        (): void => {
+          expect(fs.writeFileSync).toHaveBeenCalledTimes(1);
+          expect(fs.writeFileSync).toHaveBeenCalledWith(
+            expect.anything(),
+            expect.not.stringContaining("\n---\n")
+          );
+        },
+      ],
+    },
+
+    {
+      name: "isDefault === true; creates two (2) middleware",
+      actual: (): unknown =>
+        reconcile.createMiddlewareForRing(
+          "path-to-ring",
+          "my-service",
+          "my-ring",
+          "v1",
+          true
+        ),
+      expected: {
+        ringed: expect.objectContaining({
+          metadata: { name: "my-service-my-ring" },
+        }),
+        default: expect.objectContaining({ metadata: { name: "my-service" } }),
+      },
+      effects: [
+        (): void => {
+          expect(fs.writeFileSync).toHaveBeenCalledTimes(1);
+          expect(fs.writeFileSync).toHaveBeenCalledWith(
+            expect.anything(),
+            expect.stringContaining("\n---\n")
+          );
+        },
+      ],
+    },
+  ];
+
+  for (const { name, actual, expected, effects } of tests) {
+    it(name, () => {
+      expect(actual()).toStrictEqual(expected);
+      for (const effect of effects ?? []) {
+        effect();
+      }
+    });
+  }
+});
+
+describe("createIngressRouteForRing", () => {
+  const { services } = mocks.createTestBedrockYaml(false) as BedrockFile;
+  const tests: {
+    name: string;
+    actual: () => unknown;
+    expected: unknown;
+    effects?: (() => void)[];
+  }[] = [
+    {
+      name: "isDefault === false; creates one (1) IngressRoute",
+      actual: (): unknown =>
+        reconcile.createIngressRouteForRing(
+          "path-to-ring",
+          "my-service",
+          Object.values(services)[0],
+          { ringed: { metadata: { name: "my-service-my-ring" } } },
+          "my-ring",
+          "version-path",
+          false
+        ),
+      expected: [
+        expect.objectContaining({ metadata: { name: "my-service-my-ring" } }),
+      ],
+      effects: [
+        (): void => {
+          // Should write out one yaml document (no "---")
+          expect(fs.writeFileSync).toHaveBeenCalledTimes(1);
+          expect(fs.writeFileSync).toHaveBeenCalledWith(
+            expect.anything(),
+            expect.not.stringContaining("\n---\n")
+          );
+        },
+      ],
+    },
+
+    {
+      name: "isDefault === true; creates two (2) IngressRoute",
+      actual: (): unknown =>
+        reconcile.createIngressRouteForRing(
+          "foo",
+          "my-service",
+          Object.values(services)[0],
+          { ringed: { metadata: { name: "my-service-my-ring" } } },
+          "my-ring",
+          "version-path",
+          true
+        ),
+      expected: [
+        expect.objectContaining({ metadata: { name: "my-service-my-ring" } }),
+        expect.objectContaining({ metadata: { name: "my-service" } }),
+      ],
+      effects: [
+        (): void => {
+          // Should write out two yaml documents (with "---")
+          expect(fs.writeFileSync).toHaveBeenCalledTimes(1);
+          expect(fs.writeFileSync).toHaveBeenCalledWith(
+            expect.anything(),
+            expect.stringContaining("\n---\n")
+          );
+        },
+      ],
+    },
+  ];
+
+  for (const { name, actual, expected, effects } of tests) {
+    it(name, () => {
+      expect(actual()).toStrictEqual(expected);
+      for (const effect of effects ?? []) {
+        effect();
+      }
+    });
+  }
+});

src/commands/hld/reconcile.test.ts

@@ -2,6 +2,7 @@ import path from "path";
 import { create as createBedrockYaml } from "../../lib/bedrockYaml";
 import { disableVerboseLogging, enableVerboseLogging } from "../../logger";
 import { BedrockFile, BedrockServiceConfig } from "../../types";
+import * as reconcile from "./reconcile";
 import {
   addChartToRing,
   checkForFabrikate,
@@ -14,13 +15,12 @@ import {
   execAndLog,
   execute,
   getFullPathPrefix,
-  ReconcileDependencies,
   normalizedName,
+  ReconcileDependencies,
   reconcileHld,
   testAndGetAbsPath,
   validateInputs,
 } from "./reconcile";
-import * as reconcile from "./reconcile";
 
 beforeAll(() => {
   enableVerboseLogging();