add functions/vendor files

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

@@ -0,0 +1,82 @@
+package digest
+
+import (
+	"testing"
+)
+
+func TestParseDigest(t *testing.T) {
+	for _, testcase := range []struct {
+		input     string
+		err       error
+		algorithm Algorithm
+		hex       string
+	}{
+		{
+			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,
+		},
+		{
+			// too short
+			input: "sha256:abcdef0123456789",
+			err:   ErrDigestInvalidLength,
+		},
+		{
+			// too short (from different algorithm)
+			input: "sha512:abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789",
+			err:   ErrDigestInvalidLength,
+		},
+		{
+			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)
+		}
+	}
+}