Support the $comment keyword in test cases (#124)

See: #110
Signed-off-by: Juan Cruz Viotti <[email protected]>

docs/test.markdown

@@ -30,6 +30,7 @@ To create a test definition, you must write JSON documents that look like this:
 ```json
 {
   "$schema": "http://json-schema.org/draft-04/schema#",
+  "$comment": "An arbitrary comment! Put whatever you want here",
   "tests": [
     {
       "description": "The empty object is valid",

test/CMakeLists.txt

@@ -87,6 +87,7 @@ add_jsonschema_test_unix(test/pass_empty)
 add_jsonschema_test_unix(test/pass_empty_verbose)
 add_jsonschema_test_unix(test/pass_single_resolve)
 add_jsonschema_test_unix(test/pass_single_resolve_verbose)
+add_jsonschema_test_unix(test/pass_single_comment_verbose)
 add_jsonschema_test_unix(test/pass_single_no_description_verbose)
 add_jsonschema_test_unix(test/pass_single_no_test_description_verbose)
 add_jsonschema_test_unix(test/pass_multi_directory_resolve)

test/test/pass_single_comment_verbose.sh

@@ -0,0 +1,44 @@
+#!/bin/sh
+
+set -o errexit
+set -o nounset
+
+TMP="$(mktemp -d)"
+clean() { rm -rf "$TMP"; }
+trap clean EXIT
+
+cat << 'EOF' > "$TMP/schema.json"
+{
+  "id": "https://example.com",
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "string"
+}
+EOF
+
+cat << 'EOF' > "$TMP/test.json"
+{
+  "$schema": "https://example.com",
+  "$comment": "A random comment",
+  "tests": [
+    {
+      "valid": true,
+      "data": "foo"
+    },
+    {
+      "valid": false,
+      "data": 1
+    }
+  ]
+}
+EOF
+
+"$1" test "$TMP/test.json" --resolve "$TMP/schema.json" --verbose 1> "$TMP/output.txt" 2>&1
+
+cat << EOF > "$TMP/expected.txt"
+Importing schema into the resolution context: $(realpath "$TMP")/schema.json
+$(realpath "$TMP")/test.json:
+  1/2 PASS <no description>
+  2/2 PASS <no description>
+EOF
+
+diff "$TMP/output.txt" "$TMP/expected.txt"