1 files changed, 115 insertions, 0 deletions
diff --git a/pkg/v1/hash_test.go b/pkg/v1/hash_test.go
new file mode 100644
index 0000000..df1be77
--- /dev/null
+++ b/pkg/v1/hash_test.go
@@ -0,0 +1,115 @@
+// Copyright 2018 Google LLC All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package v1
+
+import (
+	"encoding/json"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+func TestGoodHashes(t *testing.T) {
+	good := []string{
+		"sha256:deadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef",
+		"sha256:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef",
+	}
+
+	for _, s := range good {
+		h, err := NewHash(s)
+		if err != nil {
+			t.Error("Unexpected error parsing hash:", err)
+		}
+		if got, want := h.String(), s; got != want {
+			t.Errorf("String(); got %q, want %q", got, want)
+		}
+		bytes, err := json.Marshal(h)
+		if err != nil {
+			t.Error("Unexpected error json.Marshaling hash:", err)
+		}
+		if got, want := string(bytes), strconv.Quote(h.String()); got != want {
+			t.Errorf("json.Marshal(); got %q, want %q", got, want)
+		}
+	}
+}
+
+func TestBadHashes(t *testing.T) {
+	bad := []string{
+		// Too short
+		"sha256:deadbeef",
+		// Bad character
+		"sha256:o123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef",
+		// Unknown algorithm
+		"md5:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef",
+		// Too few parts
+		"0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef",
+		// Too many parts
+		"md5:sha256:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef",
+	}
+
+	for _, s := range bad {
+		h, err := NewHash(s)
+		if err == nil {
+			t.Error("Expected error, got:", h)
+		}
+	}
+}
+
+func TestSHA256(t *testing.T) {
+	input := "asdf"
+	h, n, err := SHA256(strings.NewReader(input))
+	if err != nil {
+		t.Error("SHA256(asdf) =", err)
+	}
+	if got, want := h.Algorithm, "sha256"; got != want {
+		t.Errorf("Algorithm; got %v, want %v", got, want)
+	}
+	if got, want := h.Hex, "f0e4c2f76c58916ec258f246851bea091d14d4247a2fc3e18694461b1816e13b"; got != want {
+		t.Errorf("Hex; got %v, want %v", got, want)
+	}
+	if got, want := n, int64(len(input)); got != want {
+		t.Errorf("n; got %v, want %v", got, want)
+	}
+}
+
+// This tests that you can use Hash as a key in a map (needs to implement both
+// MarshalText and UnmarshalText).
+func TestTextMarshalling(t *testing.T) {
+	foo := make(map[Hash]string)
+	b, err := json.Marshal(foo)
+	if err != nil {
+		t.Fatal("could not marshal:", err)
+	}
+	if err := json.Unmarshal(b, &foo); err != nil {
+		t.Error("could not unmarshal:", err)
+	}
+
+	h := &Hash{
+		Algorithm: "sha256",
+		Hex:       strings.Repeat("a", 64),
+	}
+	g := &Hash{}
+	text, err := h.MarshalText()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := g.UnmarshalText(text); err != nil {
+		t.Fatal(err)
+	}
+
+	if h.String() != g.String() {
+		t.Errorf("mismatched hash: %s != %s", h, g)
+	}
+}