From 88a6e6d3746826172524d339aca7b80baac4588f Mon Sep 17 00:00:00 2001
From: ashmrtn <3891298+ashmrtn@users.noreply.github.com>
Date: Thu, 31 Aug 2023 08:50:41 -0700
Subject: [PATCH] Use a larger data chunk to test compression (#4115)

Test that compression is on by default by having one file be large and easily compressible. Compression is indirectly checked by looking at how many bytes were uploaded.

---

#### Does this PR need a docs update or release note?

- [ ] :white_check_mark: Yes, it's included
- [ ] :clock1: Yes, but in a later PR
- [x] :no_entry: No

#### Type of change

- [ ] :sunflower: Feature
- [ ] :bug: Bugfix
- [ ] :world_map: Documentation
- [x] :robot: Supportability/Tests
- [ ] :computer: CI/Deployment
- [x] :broom: Tech Debt/Cleanup

#### Issue(s)

* closes #3156

#### Test Plan

- [x] :muscle: Manual
- [ ] :zap: Unit test
- [ ] :green_heart: E2E
---
 src/internal/kopia/wrapper_test.go | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/src/internal/kopia/wrapper_test.go b/src/internal/kopia/wrapper_test.go
index 8c511a6f0..c43b724eb 100644
--- a/src/internal/kopia/wrapper_test.go
+++ b/src/internal/kopia/wrapper_test.go
@@ -5,6 +5,7 @@ import (
 	"context"
 	"io"
 	stdpath "path"
+	"strings"
 	"testing"
 	"time"
 
@@ -765,18 +766,24 @@ func (suite *KopiaIntegrationSuite) TearDownTest() {
 }
 
 func (suite *KopiaIntegrationSuite) TestBackupCollections() {
+	c1 := exchMock.NewCollection(
+		suite.storePath1,
+		suite.locPath1,
+		5)
+	// Add a 4k chunk of data that should be compressible. This helps check
+	// compression is enabled because we do some testing on the number of bytes
+	// uploaded during the first backup.
+	c1.Data[0] = []byte(strings.Repeat("abcdefgh", 512))
+
 	collections := []data.BackupCollection{
-		exchMock.NewCollection(
-			suite.storePath1,
-			suite.locPath1,
-			5),
+		c1,
 		exchMock.NewCollection(
 			suite.storePath2,
 			suite.locPath2,
 			42),
 	}
 
-	c1 := exchMock.NewCollection(
+	c1 = exchMock.NewCollection(
 		suite.storePath1,
 		suite.locPath1,
 		0)