74 lines
2.1 KiB
Go
74 lines
2.1 KiB
Go
package contentutil
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import (
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"bytes"
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"context"
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"io"
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"testing"
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"github.com/containerd/containerd/content"
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"github.com/containerd/containerd/errdefs"
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digest "github.com/opencontainers/go-digest"
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ocispecs "github.com/opencontainers/image-spec/specs-go/v1"
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"github.com/pkg/errors"
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"github.com/stretchr/testify/require"
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)
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func TestReadWrite(t *testing.T) {
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t.Parallel()
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ctx := context.TODO()
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b := NewBuffer()
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err := content.WriteBlob(ctx, b, "foo", bytes.NewBuffer([]byte("foo0")), ocispecs.Descriptor{Size: -1})
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require.NoError(t, err)
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err = content.WriteBlob(ctx, b, "foo", bytes.NewBuffer([]byte("foo1")), ocispecs.Descriptor{Size: 4})
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require.NoError(t, err)
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err = content.WriteBlob(ctx, b, "foo", bytes.NewBuffer([]byte("foo2")), ocispecs.Descriptor{Size: 3})
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require.Error(t, err)
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err = content.WriteBlob(ctx, b, "foo", bytes.NewBuffer([]byte("foo3")), ocispecs.Descriptor{Size: -1, Digest: digest.FromBytes([]byte("foo4"))})
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require.Error(t, err)
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err = content.WriteBlob(ctx, b, "foo", bytes.NewBuffer([]byte("foo4")), ocispecs.Descriptor{Size: -1, Digest: digest.FromBytes([]byte("foo4"))})
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require.NoError(t, err)
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dt, err := content.ReadBlob(ctx, b, ocispecs.Descriptor{Digest: digest.FromBytes([]byte("foo1"))})
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require.NoError(t, err)
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require.Equal(t, string(dt), "foo1")
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_, err = content.ReadBlob(ctx, b, ocispecs.Descriptor{Digest: digest.FromBytes([]byte("foo3"))})
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require.Error(t, err)
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require.Equal(t, true, errors.Is(err, errdefs.ErrNotFound))
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}
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func TestReaderAt(t *testing.T) {
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t.Parallel()
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ctx := context.TODO()
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b := NewBuffer()
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err := content.WriteBlob(ctx, b, "foo", bytes.NewBuffer([]byte("foobar")), ocispecs.Descriptor{Size: -1})
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require.NoError(t, err)
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rdr, err := b.ReaderAt(ctx, ocispecs.Descriptor{Digest: digest.FromBytes([]byte("foobar"))})
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require.NoError(t, err)
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require.Equal(t, int64(6), rdr.Size())
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buf := make([]byte, 3)
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n, err := rdr.ReadAt(buf, 1)
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require.NoError(t, err)
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require.Equal(t, "oob", string(buf[:n]))
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buf = make([]byte, 7)
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n, err = rdr.ReadAt(buf, 3)
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require.Error(t, err)
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require.Equal(t, err, io.EOF)
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require.Equal(t, "bar", string(buf[:n]))
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}
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