chore: Add test helpers to improve coverage (#166)

* chore: Rename ProjectHistory to ProjectVersion

Version more accurately represents version storage. This
forks from the WorkspaceHistory name, but I think it's
easier to understand Workspace history.

* Rename files

* Standardize tests a bit more

* Remove Server struct from coderdtest

* Improve test coverage for workspace history

* Fix linting errors

* Fix coderd test leak

* Fix coderd test leak

* Improve workspace history logs

* Standardize test structure for codersdk

* Fix linting errors

* Fix WebSocket compression

* Update coderd/workspaces.go

Co-authored-by: Bryan <bryan@coder.com>

* Add test for listing project parameters

* Cache npm dependencies with setup node

* Remove windows npm cache key

Co-authored-by: Bryan <bryan@coder.com>

provisioner/echo/serve.go

@@ -48,6 +48,10 @@ func (*echo) Parse(request *proto.Parse_Request, stream proto.DRPCProvisioner_Pa
 		path := filepath.Join(request.Directory, fmt.Sprintf("%d.parse.protobuf", index))
 		_, err := os.Stat(path)
 		if err != nil {
+			if index == 0 {
+				// Error if nothing is around to enable failed states.
+				return xerrors.New("no state")
+			}
 			break
 		}
 		data, err := os.ReadFile(path)
@@ -64,7 +68,8 @@ func (*echo) Parse(request *proto.Parse_Request, stream proto.DRPCProvisioner_Pa
 			return err
 		}
 	}
-	return nil
+	<-stream.Context().Done()
+	return stream.Context().Err()
 }
 
 // Provision reads requests from the provided directory to stream responses.
@@ -73,6 +78,10 @@ func (*echo) Provision(request *proto.Provision_Request, stream proto.DRPCProvis
 		path := filepath.Join(request.Directory, fmt.Sprintf("%d.provision.protobuf", index))
 		_, err := os.Stat(path)
 		if err != nil {
+			if index == 0 {
+				// Error if nothing is around to enable failed states.
+				return xerrors.New("no state")
+			}
 			break
 		}
 		data, err := os.ReadFile(path)
@@ -89,14 +98,24 @@ func (*echo) Provision(request *proto.Provision_Request, stream proto.DRPCProvis
 			return err
 		}
 	}
-	return nil
+	<-stream.Context().Done()
+	return stream.Context().Err()
+}
+
+type Responses struct {
+	Parse     []*proto.Parse_Response
+	Provision []*proto.Provision_Response
 }
 
 // Tar returns a tar archive of responses to provisioner operations.
-func Tar(parseResponses []*proto.Parse_Response, provisionResponses []*proto.Provision_Response) ([]byte, error) {
+func Tar(responses *Responses) ([]byte, error) {
+	if responses == nil {
+		responses = &Responses{ParseComplete, ProvisionComplete}
+	}
+
 	var buffer bytes.Buffer
 	writer := tar.NewWriter(&buffer)
-	for index, response := range parseResponses {
+	for index, response := range responses.Parse {
 		data, err := protobuf.Marshal(response)
 		if err != nil {
 			return nil, err
@@ -113,7 +132,7 @@ func Tar(parseResponses []*proto.Parse_Response, provisionResponses []*proto.Pro
 			return nil, err
 		}
 	}
-	for index, response := range provisionResponses {
+	for index, response := range responses.Provision {
 		data, err := protobuf.Marshal(response)
 		if err != nil {
 			return nil, err

provisioner/echo/serve_test.go

@@ -53,7 +53,9 @@ func TestEcho(t *testing.T) {
 				},
 			},
 		}}
-		data, err := echo.Tar(responses, nil)
+		data, err := echo.Tar(&echo.Responses{
+			Parse: responses,
+		})
 		require.NoError(t, err)
 		client, err := api.Parse(ctx, &proto.Parse_Request{
 			Directory: unpackTar(t, data),
@@ -86,7 +88,9 @@ func TestEcho(t *testing.T) {
 				},
 			},
 		}}
-		data, err := echo.Tar(nil, responses)
+		data, err := echo.Tar(&echo.Responses{
+			Provision: responses,
+		})
 		require.NoError(t, err)
 		client, err := api.Provision(ctx, &proto.Provision_Request{
 			Directory: unpackTar(t, data),