Added newIppAttrs test

Author: alexpevzner

ipp_test.go

@@ -0,0 +1,98 @@
+/* ipp-usb - HTTP reverse proxy, backed by IPP-over-USB connection to device
+ *
+ * Copyright (C) 2020 and up by Alexander Pevzner (pzz@apevzner.com)
+ * See LICENSE for license terms and conditions
+ *
+ * IPP tests
+ */
+
+package main
+
+import (
+	"testing"
+
+	"github.com/OpenPrinting/goipp"
+)
+
+// TestNewIppAttrs tests newIppAttrs function
+func TestNewIppAttrs(t *testing.T) {
+	type testData struct {
+		in  goipp.Attributes // Input attributes
+		out goipp.Attributes // Resulting attributes
+	}
+
+	tests := []testData{
+		{
+			// Normal data
+			in: goipp.Attributes{
+				goipp.MakeAttr("mopria-certified",
+					goipp.TagText,
+					goipp.String("1.3")),
+				goipp.MakeAttr("printer-make-and-model",
+					goipp.TagText,
+					goipp.String("test printer")),
+			},
+
+			out: goipp.Attributes{
+				goipp.MakeAttr("mopria-certified",
+					goipp.TagText,
+					goipp.String("1.3")),
+				goipp.MakeAttr("printer-make-and-model",
+					goipp.TagText,
+					goipp.String("test printer")),
+			},
+		},
+
+		{
+			// Duplicated attribute. First occurrence wins
+			in: goipp.Attributes{
+				goipp.MakeAttr("mopria-certified",
+					goipp.TagText,
+					goipp.String("1.3")),
+				goipp.MakeAttr("printer-make-and-model",
+					goipp.TagText,
+					goipp.String("test printer")),
+				goipp.MakeAttr("printer-make-and-model",
+					goipp.TagText,
+					goipp.String("duplicate")),
+			},
+
+			out: goipp.Attributes{
+				goipp.MakeAttr("mopria-certified",
+					goipp.TagText,
+					goipp.String("1.3")),
+				goipp.MakeAttr("printer-make-and-model",
+					goipp.TagText,
+					goipp.String("test printer")),
+			},
+		},
+	}
+
+	for _, test := range tests {
+		attrs := newIppAttrs(test.in)
+		out := attrs.export()
+
+		if !out.Similar(test.out) {
+			f := goipp.NewFormatter()
+			f.Printf("newIppAttrs test failed:")
+
+			f.Printf("input:")
+			f.SetIndent(4)
+			f.FmtAttributes(test.in)
+			f.SetIndent(0)
+
+			f.Printf("expected output:")
+			f.SetIndent(4)
+			f.FmtAttributes(test.out)
+			f.SetIndent(0)
+
+			f.Printf("present output:")
+			f.SetIndent(4)
+			f.FmtAttributes(out)
+			f.SetIndent(0)
+
+			t.Errorf("%s", f.String())
+
+		}
+	}
+}