package digest import ( "bytes" "io" "testing" ) func TestParseDigest(t *testing.T) { for _, testcase := range []struct { input string err error algorithm string 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, }, { 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) } }