test/t1001-generate-template.t: Add --template tests

Using jq to format the output so we don't have to worry about
ocitools' default tab indents or lack of trailing newlines, neither of
which play nicely with <<-EOF here documents.

The tests are known failures, because runtime-spec v1.0.0-rc1 lacks
good omitempty handling.

  $ ocitools generate --template <(echo '{}')
  …
    "hooks": {},
    "linux": {},
    "solaris": {
      "cappedCPU": {},
      "cappedMemory": {}
    }
  }

These issues are addressed by the in-flight [1,2], although their late
landings in runtime-spec mean we'll never be able to address them in
the v1.0.0.rc1 branch of ocitools.

[1]: opencontainers/runtime-spec#427
     Subject: config: Explicitly list 'hooks' as optional
[2]: opencontainers#112
     Subject: generate: Adjust to Spec.Linux being a pointer

Signed-off-by: W. Trevor King <wking@tremily.us>

test/README.md

@@ -27,12 +27,15 @@ And read the `Makefile` source to find other useful targets
 
 * [GNU Core Utilities][coreutils] for [`cat`][cat.1],
   [`echo`][echo.1], and [`head`][head.1].
+* [jq] for [`jq`][jq.1].
 
 [coreutils]: http://www.gnu.org/software/coreutils/coreutils.html
+[jq]: https://stedolan.github.io/jq/
 [prove]: http://perldoc.perl.org/prove.html
 [Sharness]: http://mlafeldt.github.io/sharness/
 [submodule]: http://git-scm.com/docs/git-submodule
 
 [cat.1]: http://pubs.opengroup.org/onlinepubs/9699919799/utilities/cat.html
 [echo.1]: http://pubs.opengroup.org/onlinepubs/9699919799/utilities/echo.html
 [head.1]: http://pubs.opengroup.org/onlinepubs/9699919799/utilities/head.html
+[jq.1]: https://stedolan.github.io/jq/manual/

test/sharness.d/miscellaneous.sh

@@ -0,0 +1,3 @@
+command -v jq >/dev/null 2>/dev/null && test_set_prereq JQ
+
+true

test/t1001-generate-template.t

@@ -0,0 +1,59 @@
+#!/bin/sh
+
+test_description='Test generate template'
+
+. ./sharness.sh
+
+test_expect_failure CAT,ECHO,HEAD,JQ 'Test ocitools generate --template with an empty template' "
+	echo '{}' >template &&
+	ocitools generate --template template | jq . >actual &&
+	cat <<-EOF >expected &&
+		{
+		  \"ociVersion\": \"1.0.0-rc1\",
+		  \"platform\": {
+		    \"os\": \"linux\",
+		    \"arch\": \"amd64\"
+		  },
+		  \"process\": {
+		    \"user\": {
+		      \"uid\": 0,
+		      \"gid\": 0
+		    },
+		    \"args\": null,
+		    \"cwd\": \"/\"
+		  },
+		  \"root\": {
+		    \"path\": \"rootfs\"
+		  }
+		}
+	EOF
+	test_cmp expected actual
+"
+
+test_expect_failure CAT,HEAD,JQ 'Test ocitools generate --template with a version' "
+	echo '{\"ociVersion\": \"0.9.0\"}' >template &&
+	ocitools generate --template template | jq . >actual &&
+	cat <<-EOF >expected &&
+		{
+		  \"ociVersion\": \"0.9.0\",
+		  \"platform\": {
+		    \"os\": \"linux\",
+		    \"arch\": \"amd64\"
+		  },
+		  \"process\": {
+		    \"user\": {
+		      \"uid\": 0,
+		      \"gid\": 0
+		    },
+		    \"args\": null,
+		    \"cwd\": \"/\"
+		  },
+		  \"root\": {
+		    \"path\": \"rootfs\"
+		  }
+		}
+	EOF
+	test_cmp expected actual
+"
+
+test_done