src: simplify go templates (#741)

templates/go/cloudevents/handle.go

@@ -3,30 +3,39 @@ package function
 import (
 	"context"
 	"fmt"
-	"os"
 
 	event "github.com/cloudevents/sdk-go/v2"
 )
 
-// Handle a CloudEvent.
-// Supported Function signatures:
-// * func()
-// * func() error
-// * func(context.Context)
-// * func(context.Context) error
-// * func(event.Event)
-// * func(event.Event) error
-// * func(context.Context, event.Event)
-// * func(context.Context, event.Event) error
-// * func(event.Event) *event.Event
-// * func(event.Event) (*event.Event, error)
-// * func(context.Context, event.Event) *event.Event
-// * func(context.Context, event.Event) (*event.Event, error)
+// Handle an event.
 func Handle(ctx context.Context, event event.Event) error {
-	if err := event.Validate(); err != nil {
-		fmt.Fprintf(os.Stderr, "invalid event received. %v", err)
-		return err
-	}
-	fmt.Printf("%v\n", event)
+
+	/*
+	 * YOUR CODE HERE
+	 *
+	 * Try running `go test`.  Add more test as you code in `handle_test.go`.
+	 */
+
+	// Example implementation:
+	fmt.Printf("%v\n", event) // print the received event to standard output
+
 	return nil
 }
+
+/*
+Other supported function signatures:
+
+	Handle()
+	Handle() error
+	Handle(context.Context)
+	Handle(context.Context) error
+	Handle(event.Event)
+	Handle(event.Event) error
+	Handle(context.Context, event.Event)
+	Handle(context.Context, event.Event) error
+	Handle(event.Event) *event.Event
+	Handle(event.Event) (*event.Event, error)
+	Handle(context.Context, event.Event) *event.Event
+	Handle(context.Context, event.Event) (*event.Event, error)
+
+*/

templates/go/cloudevents/handle_test.go

@@ -20,13 +20,3 @@ func TestHandle(t *testing.T) {
 		t.Fatal(err)
 	}
 }
-
-// TestHandleInvalid ensures that an invalid input event generates an error.
-func TestInvalidInput(t *testing.T) {
-	invalidEvent := event.New() // missing required fields
-
-	// Attempt to handle the invalid event, ensuring that the handler validats events.
-	if err := Handle(context.Background(), invalidEvent); err == nil {
-		t.Fatalf("handler did not generate error on invalid event.  Missing .Validate() check?")
-	}
-}

templates/go/http/handle.go

@@ -4,15 +4,17 @@ import (
 	"context"
 	"fmt"
 	"net/http"
-	"os"
 )
 
 // Handle an HTTP Request.
 func Handle(ctx context.Context, res http.ResponseWriter, req *http.Request) {
-	res.Header().Add("Content-Type", "text/plain")
+	/*
+	 * YOUR CODE HERE
+	 *
+	 * Try running `go test`.  Add more test as you code in `handle_test.go`.
+	 */
 
-	_, err := fmt.Fprintf(res, "OK\n")
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "error or response write: %v", err)
-	}
+	// Example implementation:
+	fmt.Println("OK")       // Print "OK" to standard output (local logs)
+	fmt.Fprintln(res, "OK") // Send "OK" back to the client
 }

templates/go/http/handle_test.go

@@ -7,8 +7,8 @@ import (
 	"testing"
 )
 
-// TestHandle ensures that Handle executes without error, returns 2000 and sets
-// and sets a content-type.
+// TestHandle ensures that Handle executes without error and returns the
+// HTTP 200 status code indicating no errors.
 func TestHandle(t *testing.T) {
 	var (
 		w   = httptest.NewRecorder()
@@ -21,6 +21,7 @@ func TestHandle(t *testing.T) {
 	func(w http.ResponseWriter, req *http.Request) {
 		Handle(context.Background(), w, req)
 	}(w, req)
+
 	res = w.Result()
 	defer res.Body.Close()
 
@@ -31,8 +32,4 @@ func TestHandle(t *testing.T) {
 	if res.StatusCode != 200 {
 		t.Fatalf("unexpected response code: %v", res.StatusCode)
 	}
-	if res.Header.Get("Content-Type") == "" {
-		t.Fatal("Handler did not set a content type for the response")
-	}
-
 }