add tests for diffing

test/integration/diffing2/expected/.git_keep/COMMIT_EDITMSG

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+asd

test/integration/diffing2/expected/.git_keep/HEAD

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+ref: refs/heads/branch2

test/integration/diffing2/expected/.git_keep/config

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+[core]
+	repositoryformatversion = 0
+	filemode = true
+	bare = false
+	logallrefupdates = true
+	ignorecase = true
+	precomposeunicode = true
+[user]
+	email = CI@example.com
+	name = CI

test/integration/diffing2/expected/.git_keep/description

@@ -0,0 +1 @@
+Unnamed repository; edit this file 'description' to name the repository.

test/integration/diffing2/expected/.git_keep/info/exclude

@@ -0,0 +1,7 @@
+# git ls-files --others --exclude-from=.git/info/exclude
+# Lines that start with '#' are comments.
+# For a project mostly in C, the following would be a good set of
+# exclude patterns (uncomment them if you want to use them):
+# *.[oa]
+# *~
+.DS_Store

test/integration/diffing2/expected/.git_keep/logs/HEAD

@@ -0,0 +1,9 @@
+0000000000000000000000000000000000000000 7bf3d13079ced18f5b00e29c48c777e23f687d0a CI <CI@example.com> 1617680651 +1000	commit (initial): file0
+7bf3d13079ced18f5b00e29c48c777e23f687d0a e876c3dfe2826621bea1bd3c87c2b9e2be88e69e CI <CI@example.com> 1617680651 +1000	commit: file1
+e876c3dfe2826621bea1bd3c87c2b9e2be88e69e c6756882cc166f52b096a5e4fb9e4f5d507870c8 CI <CI@example.com> 1617680651 +1000	commit: file2
+c6756882cc166f52b096a5e4fb9e4f5d507870c8 06da465196938ea235323950ee451ffb36a431cf CI <CI@example.com> 1617680651 +1000	commit: file4
+06da465196938ea235323950ee451ffb36a431cf 06da465196938ea235323950ee451ffb36a431cf CI <CI@example.com> 1617680651 +1000	checkout: moving from master to branch2
+06da465196938ea235323950ee451ffb36a431cf 6d04f5ed53b383c0a4c63cac168df557b6df1e44 CI <CI@example.com> 1617680651 +1000	commit: file4
+6d04f5ed53b383c0a4c63cac168df557b6df1e44 a11d868e88adb55a48fc55ee1377b3255c0cd329 CI <CI@example.com> 1617680651 +1000	commit: file4
+a11d868e88adb55a48fc55ee1377b3255c0cd329 1b74d64fe4055d4502ac600072586068b27d4aa7 CI <CI@example.com> 1617680651 +1000	commit: file2
+1b74d64fe4055d4502ac600072586068b27d4aa7 0804f2069f5af172770da3d231be982ca320bf8b CI <CI@example.com> 1617680662 +1000	commit: asd

test/integration/diffing2/expected/.git_keep/logs/refs/heads/branch2

@@ -0,0 +1,5 @@
+0000000000000000000000000000000000000000 06da465196938ea235323950ee451ffb36a431cf CI <CI@example.com> 1617680651 +1000	branch: Created from HEAD
+06da465196938ea235323950ee451ffb36a431cf 6d04f5ed53b383c0a4c63cac168df557b6df1e44 CI <CI@example.com> 1617680651 +1000	commit: file4
+6d04f5ed53b383c0a4c63cac168df557b6df1e44 a11d868e88adb55a48fc55ee1377b3255c0cd329 CI <CI@example.com> 1617680651 +1000	commit: file4
+a11d868e88adb55a48fc55ee1377b3255c0cd329 1b74d64fe4055d4502ac600072586068b27d4aa7 CI <CI@example.com> 1617680651 +1000	commit: file2
+1b74d64fe4055d4502ac600072586068b27d4aa7 0804f2069f5af172770da3d231be982ca320bf8b CI <CI@example.com> 1617680662 +1000	commit: asd

test/integration/diffing2/expected/.git_keep/logs/refs/heads/master

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+0000000000000000000000000000000000000000 7bf3d13079ced18f5b00e29c48c777e23f687d0a CI <CI@example.com> 1617680651 +1000	commit (initial): file0
+7bf3d13079ced18f5b00e29c48c777e23f687d0a e876c3dfe2826621bea1bd3c87c2b9e2be88e69e CI <CI@example.com> 1617680651 +1000	commit: file1
+e876c3dfe2826621bea1bd3c87c2b9e2be88e69e c6756882cc166f52b096a5e4fb9e4f5d507870c8 CI <CI@example.com> 1617680651 +1000	commit: file2
+c6756882cc166f52b096a5e4fb9e4f5d507870c8 06da465196938ea235323950ee451ffb36a431cf CI <CI@example.com> 1617680651 +1000	commit: file4

test/integration/diffing2/expected/.git_keep/objects/1b/74d64fe4055d4502ac600072586068b27d4aa7

@@ -0,0 +1,3 @@
+x
��1
+�0@��>��B��H���B�C�eH�\���#t����m]��!��f�bdBԌ"
+ڤ\-Iվj�h1IIݮ���W�",&�e"�^j&2�.ƩC�r�09���v�a��a|�W�}�[�և����_!���zN5���:/���?9�

test/integration/diffing2/expected/.git_keep/objects/d0/76cc9cc09acaa2d36fbc7a95fd3e2306494641

@@ -0,0 +1,2 @@
+x
+)JMU03c040031QH��I5`������ֶw���w.��h�T�[H
+��y�W5�Ɨ��(�|�
^-�W
(x9

test/integration/diffing2/expected/.git_keep/refs/heads/branch2

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+0804f2069f5af172770da3d231be982ca320bf8b

test/integration/diffing2/expected/.git_keep/refs/heads/master

@@ -0,0 +1 @@
+06da465196938ea235323950ee451ffb36a431cf

test/integration/diffing2/expected/file0

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+test0

test/integration/diffing2/expected/file1

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+test1

test/integration/diffing2/expected/file2

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+test2

test/integration/diffing2/expected/file4

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+line one

test/integration/diffing2/recording.json

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+{"KeyEvents":[{"Timestamp":819,"Mod":0,"Key":259,"Ch":0},{"Timestamp":1236,"Mod":0,"Key":256,"Ch":87},{"Timestamp":1491,"Mod":0,"Key":13,"Ch":13},{"Timestamp":1899,"Mod":0,"Key":258,"Ch":0},{"Timestamp":3115,"Mod":0,"Key":256,"Ch":87},{"Timestamp":3539,"Mod":0,"Key":258,"Ch":0},{"Timestamp":3875,"Mod":0,"Key":258,"Ch":0},{"Timestamp":4315,"Mod":0,"Key":13,"Ch":13},{"Timestamp":5291,"Mod":0,"Key":13,"Ch":13},{"Timestamp":6643,"Mod":0,"Key":13,"Ch":13},{"Timestamp":7211,"Mod":0,"Key":256,"Ch":32},{"Timestamp":7475,"Mod":0,"Key":258,"Ch":0},{"Timestamp":7627,"Mod":0,"Key":256,"Ch":32},{"Timestamp":8227,"Mod":2,"Key":16,"Ch":16},{"Timestamp":8770,"Mod":0,"Key":258,"Ch":0},{"Timestamp":8963,"Mod":0,"Key":258,"Ch":0},{"Timestamp":9227,"Mod":0,"Key":13,"Ch":13},{"Timestamp":9947,"Mod":0,"Key":260,"Ch":0},{"Timestamp":10379,"Mod":0,"Key":256,"Ch":99},{"Timestamp":10635,"Mod":0,"Key":256,"Ch":97},{"Timestamp":10674,"Mod":0,"Key":256,"Ch":115},{"Timestamp":10731,"Mod":0,"Key":256,"Ch":100},{"Timestamp":11203,"Mod":0,"Key":13,"Ch":13},{"Timestamp":11715,"Mod":0,"Key":256,"Ch":113}],"ResizeEvents":[{"Timestamp":0,"Width":272,"Height":74}]}

test/integration/diffing2/setup.sh

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+#!/bin/sh
+
+cd $1
+
+git init
+
+git config user.email "CI@example.com"
+git config user.name "CI"
+
+echo test0 > file0
+git add .
+git commit -am file0
+
+echo test1 > file1
+git add .
+git commit -am file1
+
+echo test2 > file2
+git add .
+git commit -am file2
+
+echo "line one" > file4
+git add .
+git commit -am file4
+
+git checkout -b branch2
+
+echo "line two" >> file4
+git add .
+git commit -am file4
+
+echo "line three" >> file4
+git add .
+git commit -am file4
+
+echo "line two" >> file2
+git add .
+git commit -am file2

test/integration/diffing2/test.json

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+{ "description": "diffing two branches and making a patch from their diff files", "speed": 10 }