test: Add tests for 'ocitools generate' and --output

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

test/README.md

@@ -21,6 +21,8 @@ And read the `Makefile` source to find other useful targets
 
 0 - Global ocitools options.
 
+1 - `ocitools generate`.
+
 ## Dependencies
 
 * [GNU Core Utilities][coreutils] for [`cat`][cat.1],

test/t1000-generate-output.t

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+test_description='Test generate output'
+
+. ./sharness.sh
+
+test_expect_success CAT,HEAD 'Test ocitools generate writing to stdout' "
+	ocitools generate | head -n2 >actual &&
+	cat <<EOF >expected &&
+{
+	\"ociVersion\": \"1.0.0-rc1\",
+EOF
+	test_cmp expected actual
+"
+
+test_expect_success CAT,HEAD 'Test ocitools generate --output' "
+	ocitools generate --output config.json &&
+	head -n2 config.json >actual &&
+	cat <<EOF >expected &&
+{
+	\"ociVersion\": \"1.0.0-rc1\",
+EOF
+	test_cmp expected actual
+"
+
+test_done