1 files changed, 95 insertions, 0 deletions
diff --git a/modules/npm/package_builder_test.go b/modules/npm/package_builder_test.go
new file mode 100644
index 000000000..510a04776
--- /dev/null
+++ b/modules/npm/package_builder_test.go
@@ -0,0 +1,95 @@
+// Copyright 2020 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 npm
+
+import (
+	"strings"
+	"testing"
+
+	qt "github.com/frankban/quicktest"
+)
+
+const templ = `{
+        "name": "foo",
+        "version": "0.1.1",
+        "scripts": {},
+         "dependencies": {
+                "react-dom": "1.1.1",
+                "tailwindcss": "1.2.0",
+                "@babel/cli": "7.8.4",
+                "@babel/core": "7.9.0",
+                "@babel/preset-env": "7.9.5"
+        },
+        "devDependencies": {
+                "postcss-cli": "7.1.0",
+                "tailwindcss": "1.2.0",
+                "@babel/cli": "7.8.4",
+                "@babel/core": "7.9.0",
+                "@babel/preset-env": "7.9.5"
+        }
+}`
+
+func TestPackageBuilder(t *testing.T) {
+	c := qt.New(t)
+
+	b := newPackageBuilder("", strings.NewReader(templ))
+	c.Assert(b.Err(), qt.IsNil)
+
+	b.Add("mymod", strings.NewReader(`{
+"dependencies": {
+	 "react-dom": "9.1.1",
+	 "add1": "1.1.1"
+},
+"devDependencies": {
+	 "tailwindcss": "error",
+	 "add2": "2.1.1"
+}	
+}`))
+
+	b.Add("mymod", strings.NewReader(`{
+"dependencies": {
+	 "react-dom": "error",
+	 "add1": "error",
+	 "add3": "3.1.1"
+},
+"devDependencies": {
+	 "tailwindcss": "error",
+	 "add2": "error",
+	 "add4": "4.1.1"
+	 
+}	
+}`))
+
+	c.Assert(b.Err(), qt.IsNil)
+
+	c.Assert(b.dependencies, qt.DeepEquals, map[string]interface{}{
+		"@babel/cli":        "7.8.4",
+		"add1":              "1.1.1",
+		"add3":              "3.1.1",
+		"@babel/core":       "7.9.0",
+		"@babel/preset-env": "7.9.5",
+		"react-dom":         "1.1.1",
+		"tailwindcss":       "1.2.0",
+	})
+
+	c.Assert(b.devDependencies, qt.DeepEquals, map[string]interface{}{
+		"tailwindcss":       "1.2.0",
+		"@babel/cli":        "7.8.4",
+		"@babel/core":       "7.9.0",
+		"add2":              "2.1.1",
+		"add4":              "4.1.1",
+		"@babel/preset-env": "7.9.5",
+		"postcss-cli":       "7.1.0",
+	})
+}