dev-docs: Go package docs (#958)

* Remove unused package

* Add Go package docs to most packages

Signed-off-by: Daniel Weiße <dw@edgeless.systems>
Signed-off-by: Fabian Kammel <fk@edgeless.systems>
Signed-off-by: Paul Meyer <49727155+katexochen@users.noreply.github.com>
Co-authored-by: Paul Meyer <49727155+katexochen@users.noreply.github.com>
Co-authored-by: Fabian Kammel <fk@edgeless.systems>

internal/grpc/testdialer/testdialer.go

@@ -0,0 +1,48 @@
+/*
+Copyright (c) Edgeless Systems GmbH
+
+SPDX-License-Identifier: AGPL-3.0-only
+*/
+
+// Package testdialer provides a fake dialer for testing.
+package testdialer
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"sync"
+
+	"google.golang.org/grpc/test/bufconn"
+)
+
+// BufconnDialer is a fake dialer based on gRPC bufconn package.
+type BufconnDialer struct {
+	mut       sync.Mutex
+	listeners map[string]*bufconn.Listener
+}
+
+// NewBufconnDialer creates a new bufconn dialer for testing.
+func NewBufconnDialer() *BufconnDialer {
+	return &BufconnDialer{listeners: make(map[string]*bufconn.Listener)}
+}
+
+// DialContext implements the Dialer interface.
+func (b *BufconnDialer) DialContext(ctx context.Context, network, address string) (net.Conn, error) {
+	b.mut.Lock()
+	listener, ok := b.listeners[address]
+	b.mut.Unlock()
+	if !ok {
+		return nil, fmt.Errorf("could not connect to server on %v", address)
+	}
+	return listener.DialContext(ctx)
+}
+
+// GetListener returns a fake listener that is coupled with this dialer.
+func (b *BufconnDialer) GetListener(endpoint string) net.Listener {
+	listener := bufconn.Listen(1024)
+	b.mut.Lock()
+	b.listeners[endpoint] = listener
+	b.mut.Unlock()
+	return listener
+}