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// 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)
}
}
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