add unittest for text_renderer.go (#168)

Signed-off-by: yxxhero <aiopsclub@163.com>

pkg/tmpl/text_renderer_test.go

@@ -0,0 +1,58 @@
+package tmpl
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+// TestTextRenderer tests the text renderer.
+func TestNewTextRenderer(t *testing.T) {
+	tData := map[string]interface{}{
+		"foo": "bar",
+	}
+	tr := NewTextRenderer(os.ReadFile, ".", tData)
+	require.Equal(t, tData, tr.Data)
+	require.Equal(t, ".", tr.Context.basePath)
+}
+
+// TestTextRenderer tests the text renderer.
+func TestTextRender(t *testing.T) {
+	tData := map[string]interface{}{
+		"foot": "bart",
+	}
+	tr := NewTextRenderer(os.ReadFile, ".", tData)
+
+	tests := []struct {
+		text    string
+		expectd string
+		wantErr bool
+	}{
+		{
+			text:    `{{ $foo := .foot }}{{ $foo }}`,
+			expectd: "bart",
+			wantErr: false,
+		},
+		{
+			text:    `{ $foo := .foot }}{{ $foo }}`,
+			wantErr: true,
+		},
+		{
+			text:    `{{ $foo := .a }}{{ $foo }}`,
+			wantErr: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.text, func(t *testing.T) {
+			got, err := tr.RenderTemplateText(tt.text)
+			if tt.wantErr {
+				require.Error(t, err)
+			} else {
+				require.NoError(t, err)
+			}
+			require.Equal(t, tt.expectd, got)
+		})
+	}
+}