versionsapi: allow debug stream

Signed-off-by: Paul Meyer <49727155+katexochen@users.noreply.github.com>

internal/versionsapi/versionsapi.go

@@ -29,7 +29,7 @@ import (
 // "v1.0" and a list of patch versions "v1.0.0", "v1.0.1", "v1.0.2" etc.
 type List struct {
 	// Stream is the update stream of the list.
-	// Currently, only "stable" is supported.
+	// Currently, only "stable" and "debug" are supported.
 	Stream string `json:"stream"`
 	// Granularity is the granularity of the base version of this list.
 	// It can be either "major" or "minor".
@@ -52,7 +52,7 @@ type List struct {
 // - All versions in the list are valid semantic versions that are finer-grained than the base version.
 func (l *List) Validate() error {
 	var issues []string
-	if l.Stream != "stable" {
+	if !IsValidStream(l.Stream) {
 		issues = append(issues, fmt.Sprintf("stream %q is not supported", l.Stream))
 	}
 	if l.Granularity != "major" && l.Granularity != "minor" {
@@ -178,6 +178,19 @@ func getFromURL(ctx context.Context, client httpc, stream, granularity, base, ki
 	return content, nil
 }
 
+// IsValidStream returns true if the given stream is a valid stream.
+func IsValidStream(stream string) bool {
+	validStreams := []string{"stable", "debug"}
+
+	for _, validStream := range validStreams {
+		if stream == validStream {
+			return true
+		}
+	}
+
+	return false
+}
+
 type httpc interface {
 	Do(req *http.Request) (*http.Response, error)
 }

internal/versionsapi/versionsapi_test.go

@@ -277,3 +277,22 @@ func minorList() *List {
 		},
 	}
 }
+
+func TestIsValidStream(t *testing.T) {
+	testCases := map[string]bool{
+		"stable":  true,
+		"debug":   true,
+		"beta":    false,
+		"alpha":   false,
+		"unknown": false,
+		"fast":    false,
+	}
+
+	for name, want := range testCases {
+		t.Run(name, func(t *testing.T) {
+			assert := assert.New(t)
+
+			assert.Equal(want, IsValidStream(name))
+		})
+	}
+}