feat(containers): helm output (#223)

Introduce an experimental parameter `provider` in `wing.toml` to allow specifying the backend for containers.

Also - fix how readiness checks are implemented.

.github/workflows/containers-pull.yaml

@@ -22,7 +22,17 @@ jobs:
         run: npm install --include=dev
         working-directory: containers
       - name: Test
-        run: wing test
+        run: |
+          #!/bin/sh
+          if [ -n "$CI" ]; then
+            snapshot_mode="assert"
+          else
+            snapshot_mode="update"
+          fi
+
+          DEBUG=1 wing test
+          wing test -t tf-aws -s $snapshot_mode containers.test.w
+          wing test -t tf-aws -s $snapshot_mode containers-with-readiness.test.w
         working-directory: containers
       - name: Pack
         run: wing pack

.github/workflows/containers-release.yaml

@@ -25,7 +25,17 @@ jobs:
         run: npm install --include=dev
         working-directory: containers
       - name: Test
-        run: wing test
+        run: |
+          #!/bin/sh
+          if [ -n "$CI" ]; then
+            snapshot_mode="assert"
+          else
+            snapshot_mode="update"
+          fi
+
+          DEBUG=1 wing test
+          wing test -t tf-aws -s $snapshot_mode containers.test.w
+          wing test -t tf-aws -s $snapshot_mode containers-with-readiness.test.w
         working-directory: containers
       - name: Pack
         run: wing pack

containers/containers-with-readiness.test.w

@@ -0,0 +1,32 @@
+bring "./workload.w" as containers;
+bring expect;
+bring http;
+
+let message = "hello, wing change!!";
+
+let hello = new containers.Workload(
+  name: "hello",
+  image: "paulbouwer/hello-kubernetes:1",
+  port: 8080,
+  readiness: "/",
+  replicas: 2,
+  env: {
+    "MESSAGE" => message,
+  },
+  public: true,
+) as "hello";
+
+
+let httpGet = inflight (url: str?): str => {
+  if let url = url {
+    return http.get(url).body;
+  }
+
+  throw "no body";
+};
+
+test "access public url" {
+  let helloBody = httpGet(hello.publicUrl);
+  log(helloBody);
+  assert(helloBody.contains(message));
+}