feat: implement and expose JavaScript classes for Fastly's Compute Core Cache feature set (#566)

Co-authored-by: Trevor Elliott <[email protected]>

Author: JakeChampion

integration-tests/js-compute/fixtures/app/src/assertions.js

@@ -1,5 +1,11 @@
 // Testing/Assertion functions //
 
+export async function sleep(milliseconds) {
+    return new Promise(resolve => {
+        setTimeout(resolve, milliseconds)
+    })
+}
+
 // TODO: Implement ReadableStream getIterator() and [@@asyncIterator]() methods
 export async function streamToString(stream) {
     const decoder = new TextDecoder();
@@ -33,6 +39,7 @@ export function pass(message = '') {
 export function fail(message = '') {
     return new Response(message, { status: 500 })
 }
+
 function prettyPrintSymbol (a) {
     if (typeof a === "symbol") {
          return String(a)

integration-tests/js-compute/fixtures/app/src/cache-core.js

@@ -76,8 +76,8 @@ import { isRunningLocally, routes } from "./routes.js";
 {
     routes.set("/cache-override/fetch/mode-none", async () => {
         if (!isRunningLocally()) {
-            const response = await fetch('https://httpbin.org/status/200', {
-                backend: 'httpbin',
+            const response = await fetch('https://http-me.glitch.me/now?status=200', {
+                backend: 'httpme',
                 cacheOverride: new CacheOverride('none')
             })
             let error = assert(response.headers.has('x-cache'), true, `CacheOveride('none'); response.headers.has('x-cache') === true`)
@@ -87,8 +87,8 @@ import { isRunningLocally, routes } from "./routes.js";
     });
     routes.set("/cache-override/fetch/mode-pass", async () => {
         if (!isRunningLocally()) {
-            const response = await fetch('https://httpbin.org/status/200', {
-                backend: 'httpbin',
+            const response = await fetch('https://http-me.glitch.me/now?status=200', {
+                backend: 'httpme',
                 cacheOverride: new CacheOverride('pass')
             })
             let error = assert(response.headers.has('x-cache'), false, `CacheOveride('pass'); response.headers.has('x-cache') === false`)

integration-tests/js-compute/fixtures/app/src/cache-override.js

@@ -10,6 +10,7 @@ import "./btoa.js"
 import "./byob.js"
 import "./byte-repeater.js"
 import "./cache-override.js"
+import "./cache-core.js"
 import "./cache-simple.js"
 import "./client.js"
 import "./config-store.js"

integration-tests/js-compute/fixtures/app/src/index.js

@@ -11,5 +11,5 @@ routes.set('/', () => {
 })
 
 export function isRunningLocally() {
-    return env('FASTLY_SERVICE_VERSION') === ''
+    return env('FASTLY_SERVICE_VERSION') ===  '' || env('FASTLY_SERVICE_VERSION') === '0'
 }