depot/go/nix/nar/narinfo_test.go

package nar

import (
	"strings"
	"testing"

	"github.com/google/go-cmp/cmp"
)

func TestRoundtripHash(t *testing.T) {
	tcs := []struct {
		base16    string
		base32    string
		base64    string
		sriBase64 string
	}{{
		base16:    "sha256:1fbeb031b3b03845e290a26b3727815f92b261f45ba68c082885f7950f2a8bc7",
		base32:    "sha256:1iwb587rbxw55048r9jvyihv54jzh4kkfsx2j3i4af5hncqv1ghz",
		base64:    "sha256:H76wMbOwOEXikKJrNyeBX5KyYfRbpowIKIX3lQ8qi8c=",
		sriBase64: "sha256-H76wMbOwOEXikKJrNyeBX5KyYfRbpowIKIX3lQ8qi8c=",
	}, {
		base16:    "sha256:42b0ead11a3146dcac102d56b63809ac405fe8d196a7748f7b6176ab44162879",
		base32:    "sha256:0y982r2anxk1gf7p99wns7l5yh5c14wbcmid22ndqiii3b8ymc22",
		base64:    "sha256:QrDq0RoxRtysEC1WtjgJrEBf6NGWp3SPe2F2q0QWKHk=",
		sriBase64: "sha256-QrDq0RoxRtysEC1WtjgJrEBf6NGWp3SPe2F2q0QWKHk=",
	}}
	for _, tc := range tcs {
		base16Got, err := hashFromString(tc.base16)
		if err != nil {
			t.Errorf("hashFromString(%q): %v", tc.base16, err)
		}
		base32Got, err := hashFromString(tc.base32)
		if err != nil {
			t.Errorf("hashFromString(%q): %v", tc.base32, err)
		}
		base64Got, err := hashFromString(tc.base64)
		if err != nil {
			t.Errorf("hashFromString(%q): %v", tc.base64, err)
		}
		sriBase64Got, err := hashFromString(tc.sriBase64)
		if err != nil {
			t.Errorf("hashFromString(%q): %v", tc.sriBase64, err)
		}

		if diff := cmp.Diff(base16Got, base32Got); diff != "" {
			t.Errorf("hashFromString diff (-base16 +base32):\n%v", diff)
		}
		if diff := cmp.Diff(base16Got, base64Got); diff != "" {
			t.Errorf("hashFromString diff (-base16 +base64):\n%v", diff)
		}
		sriBase64Got.IsSRI = false
		if diff := cmp.Diff(base16Got, sriBase64Got); diff != "" {
			t.Errorf("hashFromString diff (-base16 +sriBase64):\n%v", diff)
		}
		sriBase64Got.IsSRI = true

		if base16Got.String() != tc.base32 {
			t.Errorf("base16Got.String() = %q; want %q", base16Got.String(), tc.base32)
		}
		if base32Got.String() != tc.base32 {
			t.Errorf("base32Got.String() = %q; want %q", base32Got.String(), tc.base32)
		}
		if base64Got.String() != tc.base32 {
			t.Errorf("base64Got.String() = %q; want %q", base64Got.String(), tc.base32)
		}
		if sriBase64Got.String() != tc.sriBase64 {
			t.Errorf("sriBase64Got.String() = %q; want %q", sriBase64Got.String(), tc.sriBase64)
		}
	}
}

func TestParseNarInfo(t *testing.T) {
	tcs := []struct {
		name    string
		input   string
		wantErr bool
		want    *NarInfo
		wantStr string
	}{{
		name:    "empty",
		input:   "",
		wantErr: true,
	}, {
		name: "bare minimum narinfo",
		input: `StorePath: /nix/store/27albyvzh5j455fhm53q1wn697f6nzkh-hello-2.10
URL: nar/1iwb587rbxw55048r9jvyihv54jzh4kkfsx2j3i4af5hncqv1ghz.nar.bz2
NarHash: sha256:0y982r2anxk1gf7p99wns7l5yh5c14wbcmid22ndqiii3b8ymc22
NarSize: 206152
`,
		want: &NarInfo{
			StorePath:   "/nix/store/27albyvzh5j455fhm53q1wn697f6nzkh-hello-2.10",
			URL:         "nar/1iwb587rbxw55048r9jvyihv54jzh4kkfsx2j3i4af5hncqv1ghz.nar.bz2",
			Compression: CompressionBzip2,
			NarHash: Hash{
				Algorithm: HashSha256,
				Hash: []byte{
					0x42, 0xb0, 0xea, 0xd1, 0x1a, 0x31, 0x46, 0xdc, 0xac, 0x10, 0x2d, 0x56, 0xb6, 0x38, 0x09, 0xac,
					0x40, 0x5f, 0xe8, 0xd1, 0x96, 0xa7, 0x74, 0x8f, 0x7b, 0x61, 0x76, 0xab, 0x44, 0x16, 0x28, 0x79,
				},
			},
			NarSize: 206152,
		},
		wantStr: `StorePath: /nix/store/27albyvzh5j455fhm53q1wn697f6nzkh-hello-2.10
URL: nar/1iwb587rbxw55048r9jvyihv54jzh4kkfsx2j3i4af5hncqv1ghz.nar.bz2
Compression: bzip2
NarHash: sha256:0y982r2anxk1gf7p99wns7l5yh5c14wbcmid22ndqiii3b8ymc22
NarSize: 206152
`,
	}, {
		name: "hello NAR",
		input: `StorePath: /nix/store/27albyvzh5j455fhm53q1wn697f6nzkh-hello-2.10
URL: nar/1iwb587rbxw55048r9jvyihv54jzh4kkfsx2j3i4af5hncqv1ghz.nar.xz
Compression: xz
FileHash: sha256:1iwb587rbxw55048r9jvyihv54jzh4kkfsx2j3i4af5hncqv1ghz
FileSize: 41180
NarHash: sha256:0y982r2anxk1gf7p99wns7l5yh5c14wbcmid22ndqiii3b8ymc22
NarSize: 206152
References: 27albyvzh5j455fhm53q1wn697f6nzkh-hello-2.10 j5p0j1w27aqdzncpw73k95byvhh5prw2-glibc-2.33-47
Deriver: s1n7mahd61zgxk2w4b1q1ani0nzqfl47-hello-2.10.drv
Sig: cache.nixos.org-1:jdYq19bNeGQ7rqzMcJu6IQeSNmAgLVrZUbnVc6KOXw8aTevoZcMNOdDS8s+puPq4BDC1+A2jvH0aUgc9lkBzCw==
`,
		want: &NarInfo{
			StorePath:   "/nix/store/27albyvzh5j455fhm53q1wn697f6nzkh-hello-2.10",
			URL:         "nar/1iwb587rbxw55048r9jvyihv54jzh4kkfsx2j3i4af5hncqv1ghz.nar.xz",
			Compression: CompressionXz,
			FileHash: Hash{
				Algorithm: HashSha256,
				Hash: []byte{
					0x1f, 0xbe, 0xb0, 0x31, 0xb3, 0xb0, 0x38, 0x45, 0xe2, 0x90, 0xa2, 0x6b, 0x37, 0x27, 0x81, 0x5f,
					0x92, 0xb2, 0x61, 0xf4, 0x5b, 0xa6, 0x8c, 0x08, 0x28, 0x85, 0xf7, 0x95, 0x0f, 0x2a, 0x8b, 0xc7,
				},
			},
			FileSize: 41180,
			NarHash: Hash{
				Algorithm: HashSha256,
				Hash: []byte{
					0x42, 0xb0, 0xea, 0xd1, 0x1a, 0x31, 0x46, 0xdc, 0xac, 0x10, 0x2d, 0x56, 0xb6, 0x38, 0x09, 0xac,
					0x40, 0x5f, 0xe8, 0xd1, 0x96, 0xa7, 0x74, 0x8f, 0x7b, 0x61, 0x76, 0xab, 0x44, 0x16, 0x28, 0x79,
				},
			},
			NarSize: 206152,
			References: []string{
				"27albyvzh5j455fhm53q1wn697f6nzkh-hello-2.10",
				"j5p0j1w27aqdzncpw73k95byvhh5prw2-glibc-2.33-47",
			},
			Deriver: "s1n7mahd61zgxk2w4b1q1ani0nzqfl47-hello-2.10.drv",
			Sig: map[string][]uint8{
				"cache.nixos.org-1": []uint8{
					0x8d, 0xd6, 0x2a, 0xd7, 0xd6, 0xcd, 0x78, 0x64, 0x3b, 0xae, 0xac, 0xcc, 0x70, 0x9b, 0xba, 0x21,
					0x07, 0x92, 0x36, 0x60, 0x20, 0x2d, 0x5a, 0xd9, 0x51, 0xb9, 0xd5, 0x73, 0xa2, 0x8e, 0x5f, 0x0f,
					0x1a, 0x4d, 0xeb, 0xe8, 0x65, 0xc3, 0x0d, 0x39, 0xd0, 0xd2, 0xf2, 0xcf, 0xa9, 0xb8, 0xfa, 0xb8,
					0x04, 0x30, 0xb5, 0xf8, 0x0d, 0xa3, 0xbc, 0x7d, 0x1a, 0x52, 0x07, 0x3d, 0x96, 0x40, 0x73, 0x0b,
				},
			},
		},
	}}
	for _, tc := range tcs {
		t.Run(tc.name, func(t *testing.T) {
			got, err := ParseNarInfo(strings.NewReader(tc.input))
			if !tc.wantErr && err != nil {
				t.Fatalf("ParseNarInfo: %v", err)
			} else if tc.wantErr && err == nil {
				t.Fatal("ParseNarInfo didn't return error (expected one)")
			}

			if diff := cmp.Diff(tc.want, got); diff != "" {
				t.Errorf("ParseNarInfo mismatch (-want +got):\n%s", diff)
			}

			if got != nil {
				wantStr := tc.wantStr
				if wantStr == "" {
					wantStr = tc.input
				}
				if got.String() != wantStr {
					t.Errorf("roundtrip: got.String() = \n%v\n\nwant:\n%v", got.String(), wantStr)
				}
			}
		})
	}
}