[bug#49221] [PATCH v2 2/2] gnu: restic: Patch tests for go-1.16.

[Sarah Morgensen <iskarian@mgsn.dev>]

* gnu/packages/patches/restic-0.9.6-fix-tests-for-go1.15.patch: New
file.
* gnu/local.mk (dist_patch_DATA): Register it.
* gnu/packages/backup.scm (restic): Use it.
---
 gnu/local.mk                                  |  1 +
 gnu/packages/backup.scm                       |  5 +-
 .../restic-0.9.6-fix-tests-for-go1.15.patch   | 51 +++++++++++++++++++
 3 files changed, 56 insertions(+), 1 deletion(-)
 create mode 100644 gnu/packages/patches/restic-0.9.6-fix-tests-for-go1.15.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index 5b2e64a8b8..03a93caed6 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -1694,6 +1694,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/rtags-separate-rct.patch			\
   %D%/packages/patches/racket-minimal-sh-via-rktio.patch	\
   %D%/packages/patches/remake-impure-dirs.patch			\
+  %D%/packages/patches/restic-0.9.6-fix-tests-for-go1.15.patch	\
   %D%/packages/patches/retroarch-LIBRETRO_DIRECTORY.patch	\
   %D%/packages/patches/rnp-add-version.cmake.patch		\
   %D%/packages/patches/rnp-disable-ruby-rnp-tests.patch		\
diff --git a/gnu/packages/backup.scm b/gnu/packages/backup.scm
index 9ec4e281d8..d8d8728a14 100644
--- a/gnu/packages/backup.scm
+++ b/gnu/packages/backup.scm
@@ -20,6 +20,7 @@
 ;;; Copyright © 2020 Michael Rohleder <mike@rohleder.de>
 ;;; Copyright © 2021 Timothy Sample <samplet@ngyro.com>
 ;;; Copyright © 2021 Brice Waegeneire <brice@waegenei.re>
+;;; Copyright © 2021 Sarah Morgensen <iskarian@mgsn.dev>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -928,7 +929,9 @@ is like a time machine for your data. ")
               (file-name (string-append name "-" version ".tar.gz"))
               (sha256
                (base32
-                "1zmh42aah32ah8w5n6ilz9bci0y2xrf8p7qshy3yf1lzm5gnbj0w"))))
+                "1zmh42aah32ah8w5n6ilz9bci0y2xrf8p7qshy3yf1lzm5gnbj0w"))
+              (patches
+               (search-patches "restic-0.9.6-fix-tests-for-go1.15.patch"))))
     (build-system go-build-system)
     (arguments
      `(#:import-path "github.com/restic/restic"
diff --git a/gnu/packages/patches/restic-0.9.6-fix-tests-for-go1.15.patch b/gnu/packages/patches/restic-0.9.6-fix-tests-for-go1.15.patch
new file mode 100644
index 0000000000..cc510c1cfe
--- /dev/null
+++ b/gnu/packages/patches/restic-0.9.6-fix-tests-for-go1.15.patch
@@ -0,0 +1,51 @@
+This cherry-picked patch fixes tests for Go >= 1.15. Restic v0.10 (which
+includes this patch) requires go module support from the Go build system.
+Original patch follows.
+
+---
+From 97950ab81a18de06b95384da6d8646fef87c9d97 Mon Sep 17 00:00:00 2001
+From: Alexander Neumann <alexander@bumpern.de>
+Date: Sat, 12 Sep 2020 17:36:44 +0200
+Subject: [PATCH] options: Fix test for Go >= 1.15
+
+---
+ internal/options/options_test.go | 12 +++++++++---
+ 1 file changed, 9 insertions(+), 3 deletions(-)
+
+diff --git a/internal/options/options_test.go b/internal/options/options_test.go
+index de94fc90a1..8d268992a3 100644
+--- a/internal/options/options_test.go
++++ b/internal/options/options_test.go
+@@ -3,6 +3,7 @@ package options
+ import (
+ 	"fmt"
+ 	"reflect"
++	"regexp"
+ 	"testing"
+ 	"time"
+ )
+@@ -199,7 +200,7 @@ var invalidSetTests = []struct {
+ 			"timeout": "2134",
+ 		},
+ 		"ns",
+-		`time: missing unit in duration 2134`,
++		`time: missing unit in duration "?2134"?`,
+ 	},
+ }
+ 
+@@ -212,8 +213,13 @@ func TestOptionsApplyInvalid(t *testing.T) {
+ 				t.Fatalf("expected error %v not found", test.err)
+ 			}
+ 
+-			if err.Error() != test.err {
+-				t.Fatalf("expected error %q, got %q", test.err, err.Error())
++			matched, err := regexp.MatchString(test.err, err.Error())
++			if err != nil {
++				t.Fatal(err)
++			}
++
++			if !matched {
++				t.Fatalf("expected error to match %q, got %q", test.err, err.Error())
+ 			}
+ 		})
+ 	}
-- 
2.31.1