Add tests

Signed-off-by: Kevin Su <pingsutw@apache.org>

go/tasks/pluginmachinery/io/iface.go

@@ -43,7 +43,7 @@ type OutputReader interface {
 	Read(ctx context.Context) (*core.LiteralMap, *ExecutionError, error)
 	// DeckExists checks if the deck file has been generated.
 	DeckExists(ctx context.Context) (bool, error)
-	// GetOutputMetadata get the metadata from task's output, like deck uri
+	// GetOutputMetadata get the metadata from the output of tasks, such as deck URI.
 	GetOutputMetadata(ctx context.Context) map[string]string
 }
 

go/tasks/pluginmachinery/ioutils/in_memory_output_reader.go

@@ -48,6 +48,9 @@ func (r InMemoryOutputReader) DeckExists(_ context.Context) (bool, error) {
 }
 
 func (r InMemoryOutputReader) GetOutputMetadata(_ context.Context) map[string]string {
+	if r.DeckPath == nil {
+		return map[string]string{}
+	}
 	return map[string]string{deckURIKey: r.DeckPath.String()}
 }
 

go/tasks/pluginmachinery/ioutils/in_memory_output_reader_test.go

@@ -25,6 +25,7 @@ func TestInMemoryOutputReader(t *testing.T) {
 	or := NewInMemoryOutputReader(&flyteIdlCore.LiteralMap{Literals: lt}, &deckPath, nil)
 
 	assert.Equal(t, &deckPath, or.DeckPath)
+	assert.Equal(t, deckPath.String(), or.GetOutputMetadata(context.Background())[deckURIKey])
 	ctx := context.TODO()
 
 	ok, err := or.IsError(ctx)

go/tasks/pluginmachinery/ioutils/remote_file_output_reader_test.go

@@ -68,6 +68,7 @@ func TestReadOrigin(t *testing.T) {
 		exists, err := r.DeckExists(ctx)
 		assert.NoError(t, err)
 		assert.True(t, exists)
+		assert.Equal(t, "deck.html", r.GetOutputMetadata(ctx)[deckURIKey])
 	})
 
 	t.Run("system", func(t *testing.T) {