1 files changed, 78 insertions, 0 deletions
diff --git a/parser/frontmatter_test.go b/parser/frontmatter_test.go
new file mode 100644
index 000000000..9d9b7c3b8
--- /dev/null
+++ b/parser/frontmatter_test.go
@@ -0,0 +1,78 @@
+// Copyright 2015 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package parser
+
+import (
+	"bytes"
+	"reflect"
+	"testing"
+
+	"github.com/gohugoio/hugo/parser/metadecoders"
+)
+
+func TestInterfaceToConfig(t *testing.T) {
+	cases := []struct {
+		input  interface{}
+		format metadecoders.Format
+		want   []byte
+		isErr  bool
+	}{
+		// TOML
+		{map[string]interface{}{}, metadecoders.TOML, nil, false},
+		{
+			map[string]interface{}{"title": "test 1"},
+			metadecoders.TOML,
+			[]byte("title = \"test 1\"\n"),
+			false,
+		},
+
+		// YAML
+		{map[string]interface{}{}, metadecoders.YAML, []byte("{}\n"), false},
+		{
+			map[string]interface{}{"title": "test 1"},
+			metadecoders.YAML,
+			[]byte("title: test 1\n"),
+			false,
+		},
+
+		// JSON
+		{map[string]interface{}{}, metadecoders.JSON, []byte("{}\n"), false},
+		{
+			map[string]interface{}{"title": "test 1"},
+			metadecoders.JSON,
+			[]byte("{\n   \"title\": \"test 1\"\n}\n"),
+			false,
+		},
+
+		// Errors
+		{nil, metadecoders.TOML, nil, true},
+		{map[string]interface{}{}, "foo", nil, true},
+	}
+
+	for i, c := range cases {
+		var buf bytes.Buffer
+
+		err := InterfaceToConfig(c.input, c.format, &buf)
+		if err != nil {
+			if c.isErr {
+				continue
+			}
+			t.Fatalf("[%d] unexpected error value: %v", i, err)
+		}
+
+		if !reflect.DeepEqual(buf.Bytes(), c.want) {
+			t.Errorf("[%d] not equal:\nwant %q,\n got %q", i, c.want, buf.Bytes())
+		}
+	}
+}