move dependencies to vendor

vendor/github.com/docker/distribution/digest/digest_test.go

@@ -0,0 +1,111 @@
+package digest
+
+import (
+	"bytes"
+	"io"
+	"testing"
+)
+
+func TestParseDigest(t *testing.T) {
+	for _, testcase := range []struct {
+		input     string
+		err       error
+		algorithm Algorithm
+		hex       string
+	}{
+		{
+			input:     "tarsum+sha256:e58fcf7418d4390dec8e8fb69d88c06ec07039d651fedd3aa72af9972e7d046b",
+			algorithm: "tarsum+sha256",
+			hex:       "e58fcf7418d4390dec8e8fb69d88c06ec07039d651fedd3aa72af9972e7d046b",
+		},
+		{
+			input:     "tarsum.dev+sha256:e58fcf7418d4390dec8e8fb69d88c06ec07039d651fedd3aa72af9972e7d046b",
+			algorithm: "tarsum.dev+sha256",
+			hex:       "e58fcf7418d4390dec8e8fb69d88c06ec07039d651fedd3aa72af9972e7d046b",
+		},
+		{
+			input:     "tarsum.v1+sha256:220a60ecd4a3c32c282622a625a54db9ba0ff55b5ba9c29c7064a2bc358b6a3e",
+			algorithm: "tarsum.v1+sha256",
+			hex:       "220a60ecd4a3c32c282622a625a54db9ba0ff55b5ba9c29c7064a2bc358b6a3e",
+		},
+		{
+			input:     "sha256:e58fcf7418d4390dec8e8fb69d88c06ec07039d651fedd3aa72af9972e7d046b",
+			algorithm: "sha256",
+			hex:       "e58fcf7418d4390dec8e8fb69d88c06ec07039d651fedd3aa72af9972e7d046b",
+		},
+		{
+			input:     "sha384:d3fc7881460b7e22e3d172954463dddd7866d17597e7248453c48b3e9d26d9596bf9c4a9cf8072c9d5bad76e19af801d",
+			algorithm: "sha384",
+			hex:       "d3fc7881460b7e22e3d172954463dddd7866d17597e7248453c48b3e9d26d9596bf9c4a9cf8072c9d5bad76e19af801d",
+		},
+		{
+			// empty hex
+			input: "sha256:",
+			err:   ErrDigestInvalidFormat,
+		},
+		{
+			// just hex
+			input: "d41d8cd98f00b204e9800998ecf8427e",
+			err:   ErrDigestInvalidFormat,
+		},
+		{
+			// not hex
+			input: "sha256:d41d8cd98f00b204e9800m98ecf8427e",
+			err:   ErrDigestInvalidFormat,
+		},
+		{
+			input: "foo:d41d8cd98f00b204e9800998ecf8427e",
+			err:   ErrDigestUnsupported,
+		},
+	} {
+		digest, err := ParseDigest(testcase.input)
+		if err != testcase.err {
+			t.Fatalf("error differed from expected while parsing %q: %v != %v", testcase.input, err, testcase.err)
+		}
+
+		if testcase.err != nil {
+			continue
+		}
+
+		if digest.Algorithm() != testcase.algorithm {
+			t.Fatalf("incorrect algorithm for parsed digest: %q != %q", digest.Algorithm(), testcase.algorithm)
+		}
+
+		if digest.Hex() != testcase.hex {
+			t.Fatalf("incorrect hex for parsed digest: %q != %q", digest.Hex(), testcase.hex)
+		}
+
+		// Parse string return value and check equality
+		newParsed, err := ParseDigest(digest.String())
+
+		if err != nil {
+			t.Fatalf("unexpected error parsing input %q: %v", testcase.input, err)
+		}
+
+		if newParsed != digest {
+			t.Fatalf("expected equal: %q != %q", newParsed, digest)
+		}
+	}
+}
+
+// A few test cases used to fix behavior we expect in storage backend.
+
+func TestFromTarArchiveZeroLength(t *testing.T) {
+	checkTarsumDigest(t, "zero-length archive", bytes.NewReader([]byte{}), DigestTarSumV1EmptyTar)
+}
+
+func TestFromTarArchiveEmptyTar(t *testing.T) {
+	// String of 1024 zeros is a valid, empty tar file.
+	checkTarsumDigest(t, "1024 zero bytes", bytes.NewReader(bytes.Repeat([]byte("\x00"), 1024)), DigestTarSumV1EmptyTar)
+}
+
+func checkTarsumDigest(t *testing.T, msg string, rd io.Reader, expected Digest) {
+	dgst, err := FromTarArchive(rd)
+	if err != nil {
+		t.Fatalf("unexpected error digesting %s: %v", msg, err)
+	}
+
+	if dgst != expected {
+		t.Fatalf("unexpected digest for %s: %q != %q", msg, dgst, expected)
+	}
+}