feat: mem, local uploader

internal/and/and_closer.go

@@ -0,0 +1,31 @@
+package and
+
+import (
+	"io"
+)
+
+type ReadCloser struct {
+	io.Reader
+	CloseFunc func() error
+}
+
+var _ io.ReadCloser = (*ReadCloser)(nil)
+
+// Close implements io.ReadCloser
+func (rac *ReadCloser) Close() error {
+	return rac.CloseFunc()
+}
+
+// WriteCloser implements io.WriteCloser by reading from a particular io.Writer
+// and then calling the provided "Close()" method.
+type WriteCloser struct {
+	io.Writer
+	CloseFunc func() error
+}
+
+var _ io.WriteCloser = (*WriteCloser)(nil)
+
+// Close implements io.WriteCloser
+func (wac *WriteCloser) Close() error {
+	return wac.CloseFunc()
+}

internal/and/and_closer_test.go

@@ -0,0 +1,85 @@
+// Copyright 2020 Google LLC All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package and
+
+import (
+	"bytes"
+	"io"
+	"testing"
+)
+
+func TestRead(t *testing.T) {
+	want := "asdf"
+	r := bytes.NewBufferString(want)
+	called := false
+
+	rac := &ReadCloser{
+		Reader: r,
+		CloseFunc: func() error {
+			called = true
+			return nil
+		},
+	}
+
+	data, err := io.ReadAll(rac)
+	if err != nil {
+		t.Errorf("ReadAll(rac) = %v", err)
+	}
+	if got := string(data); got != want {
+		t.Errorf("ReadAll(rac); got %q, want %q", got, want)
+	}
+
+	if called {
+		t.Error("called before Close(); got true, wanted false")
+	}
+	if err := rac.Close(); err != nil {
+		t.Errorf("Close() = %v", err)
+	}
+	if !called {
+		t.Error("called after Close(); got false, wanted true")
+	}
+}
+
+func TestWrite(t *testing.T) {
+	w := bytes.NewBuffer([]byte{})
+	called := false
+
+	wac := &WriteCloser{
+		Writer: w,
+		CloseFunc: func() error {
+			called = true
+			return nil
+		},
+	}
+
+	want := "asdf"
+	if _, err := wac.Write([]byte(want)); err != nil {
+		t.Errorf("Write(%q); = %v", want, err)
+	}
+
+	if called {
+		t.Error("called before Close(); got true, wanted false")
+	}
+	if err := wac.Close(); err != nil {
+		t.Errorf("Close() = %v", err)
+	}
+	if !called {
+		t.Error("called after Close(); got false, wanted true")
+	}
+
+	if got := w.String(); got != want {
+		t.Errorf("w.String(); got %q, want %q", got, want)
+	}
+}