Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/channels/app/imaging/svg_test.go

@@ -0,0 +1,86 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package imaging
+
+import (
+	"fmt"
+	"io"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+//nolint:unparam
+func generateSVGData(width int, height int, useViewBox bool, useDimensions bool, useAlternateFormat bool) io.Reader {
+	var (
+		viewBoxAttribute = ""
+		widthAttribute   = ""
+		heightAttribute  = ""
+	)
+	if useViewBox == true {
+		separator := " "
+		if useAlternateFormat == true {
+			separator = ", "
+		}
+		viewBoxAttribute = fmt.Sprintf(` viewBox="0%s0%s%d%s%d"`, separator, separator, width, separator, height)
+	}
+	if useDimensions == true && width > 0 && height > 0 {
+		units := ""
+		if useAlternateFormat == true {
+			units = "px"
+		}
+		widthAttribute = fmt.Sprintf(` width="%d%s"`, width, units)
+		heightAttribute = fmt.Sprintf(` height="%d%s"`, height, units)
+	}
+	svgString := fmt.Sprintf(`<svg%s%s%s></svg>`, widthAttribute, heightAttribute, viewBoxAttribute)
+	return strings.NewReader(svgString)
+}
+
+func TestParseValidSVGData(t *testing.T) {
+	var width, height int = 300, 300
+	validSVGs := []io.Reader{
+		generateSVGData(width, height, true, true, false),  // properly formed viewBox, width & height
+		generateSVGData(width, height, true, true, true),   // properly formed viewBox, width & height; alternate format
+		generateSVGData(width, height, false, true, false), // missing viewBox, properly formed width & height
+		generateSVGData(width, height, false, true, true),  // missing viewBox, properly formed width & height; alternate format
+	}
+	for index, svg := range validSVGs {
+		svgInfo, err := ParseSVG(svg)
+		if err != nil {
+			t.Errorf("Should be able to parse SVG attributes at index %d, but was not able to: err = %v", index, err)
+		} else {
+			if svgInfo.Width != width {
+				t.Errorf("Expecting a width of %d for SVG at index %d, but it was %d instead.", width, index, svgInfo.Width)
+			}
+
+			if svgInfo.Height != height {
+				t.Errorf("Expecting a height of %d for SVG at index %d, but it was %d instead.", height, index, svgInfo.Height)
+			}
+		}
+	}
+}
+
+func TestParseInvalidSVGData(t *testing.T) {
+	var width, height int = 300, 300
+	invalidSVGs := []io.Reader{
+		generateSVGData(width, height, false, false, false), // missing viewBox, width & height
+		generateSVGData(width, 0, false, true, false),       // missing viewBox, malformed width & height
+		generateSVGData(width, 0, false, true, false),       // missing viewBox, malformed height, properly formed width
+	}
+	for index, svg := range invalidSVGs {
+		_, err := ParseSVG(svg)
+		if err == nil {
+			t.Errorf("Should not be able to parse SVG attributes at index %d, but was definitely able to!", index)
+		}
+	}
+}
+
+func TestParseProcInstOnlySVGData(t *testing.T) {
+	svg := strings.NewReader("<?xml version='1.0' encoding='utf-8'?>")
+	svgInfo, err := ParseSVG(svg)
+	require.Error(t, err)
+	require.Equal(t, 0, svgInfo.Width)
+	require.Equal(t, 0, svgInfo.Height)
+}