Fix patch YAML without new line on end of file

pkg/yaml/yaml_test.go

@@ -104,3 +104,43 @@ func TestPatch2(t *testing.T) {
   camera2: url3
 `, string(b))
 }
+
+func TestNoNewLineEnd1(t *testing.T) {
+	b := []byte(`streams:
+  camera1: url4
+  camera2:
+    - url2
+    - url3`)
+
+	b, err := Patch(b, "camera2", "url5", "streams")
+	require.Nil(t, err)
+
+	require.Equal(t, `streams:
+  camera1: url4
+  camera2: url5
+`, string(b))
+}
+
+func TestNoNewLineEnd2(t *testing.T) {
+	b := []byte(`streams:
+  camera1: url1
+homekit:
+  camera1:
+    pin: 123-45-678`)
+
+	// 1. Add new key
+	pairings := []string{"client1", "client2"}
+
+	b, err := Patch(b, "pairings", pairings, "homekit", "camera1")
+	require.Nil(t, err)
+
+	require.Equal(t, `streams:
+  camera1: url1
+homekit:
+  camera1:
+    pin: 123-45-678
+    pairings:
+      - client1
+      - client2
+`, string(b))
+}