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/platform/services/docextractor/pdf_test.go

@@ -0,0 +1,37 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package docextractor
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/mattermost/mattermost-server/v6/server/channels/utils/testutils"
+)
+
+func TestPdfEmptyFile(t *testing.T) {
+	extractor := pdfExtractor{}
+	_, err := extractor.Extract("test.pdf", bytes.NewReader([]byte{}))
+	require.Error(t, err)
+}
+
+func TestPdfFile(t *testing.T) {
+	extractor := pdfExtractor{}
+	contentText := "This is a simple document that contains some text."
+	content, err := testutils.ReadTestFile("sample-doc.pdf")
+	require.NoError(t, err)
+	extractedText, err := extractor.Extract("sample-doc.pdf", bytes.NewReader(content))
+	require.NoError(t, err)
+	require.Equal(t, contentText, extractedText)
+}
+
+func TestWrongPdfFile(t *testing.T) {
+	extractor := pdfExtractor{}
+	content, err := testutils.ReadTestFile("sample-doc.docx")
+	require.NoError(t, err)
+	_, err = extractor.Extract("sample-doc.pdf", bytes.NewReader(content))
+	require.Error(t, err)
+}