Function TestReader

blob/blob_reader_test.go:28–71

TestReader verifies that blob.Reader implements io package interfaces correctly.

(t *testing.T)

// TestReader verifies that blob.Reader implements io package interfaces correctly.
func TestReader(t *testing.T) {
	const myKey = "testkey"

	bucket := memblob.OpenBucket(nil)
	defer bucket.Close()

	// Get some random data, of a large enough size to require multiple
	// reads/writes given our buffer size of 1024.
	data, err := randomData(1024*10 + 10)
	if err != nil {
		t.Fatal(err)
	}

	// Write the data to a key.
	ctx := context.Background()
	bucket.WriteAll(ctx, myKey, data, nil)

	// Create a blob.Reader.
	r1, err := bucket.NewReader(ctx, myKey, nil)
	if err != nil {
		t.Fatal(err)
	}
	r1.Close()
	if err := iotest.TestReader(r1, data); err != nil {
		t.Error(err)
	}

	// Create another blob.Reader to exercise the ReadFrom code path
	r2, err := bucket.NewReader(ctx, myKey, nil)
	if err != nil {
		t.Fatal(err)
	}
	defer r2.Close()

	var buffer bytes.Buffer
	n, err := io.Copy(&buffer, r2)
	if err != nil {
		t.Fatal(err)
	} else if n != int64(len(data)) {
		t.Fatal("wrote fewer bytes than expected")
	} else if !bytes.Equal(buffer.Bytes(), data) {
		t.Fatal("wrote invalid bytes")
	}
}