1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
require "spec_helper"
describe Gitlab::Git::Diff, seed_helper: true do
let(:repository) { Gitlab::Git::Repository.new('default', TEST_REPO_PATH) }
before do
@raw_diff_hash = {
diff: <<EOT.gsub(/^ {8}/, "").sub(/\n$/, ""),
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
[submodule "gitlab-shell"]
\tpath = gitlab-shell
\turl = https://github.com/gitlabhq/gitlab-shell.git
+[submodule "gitlab-grack"]
+ path = gitlab-grack
+ url = https://gitlab.com/gitlab-org/gitlab-grack.git
EOT
new_path: ".gitmodules",
old_path: ".gitmodules",
a_mode: '100644',
b_mode: '100644',
new_file: false,
renamed_file: false,
deleted_file: false,
too_large: false
}
@rugged_diff = repository.rugged.diff("5937ac0a7beb003549fc5fd26fc247adbce4a52e^", "5937ac0a7beb003549fc5fd26fc247adbce4a52e", paths:
[".gitmodules"]).patches.first
end
describe 'size limit feature toggles' do
context 'when the feature gitlab_git_diff_size_limit_increase is enabled' do
before do
Feature.enable('gitlab_git_diff_size_limit_increase')
end
it 'returns 200 KB for size_limit' do
expect(described_class.size_limit).to eq(200.kilobytes)
end
it 'returns 100 KB for collapse_limit' do
expect(described_class.collapse_limit).to eq(100.kilobytes)
end
end
context 'when the feature gitlab_git_diff_size_limit_increase is disabled' do
before do
Feature.disable('gitlab_git_diff_size_limit_increase')
end
it 'returns 100 KB for size_limit' do
expect(described_class.size_limit).to eq(100.kilobytes)
end
it 'returns 10 KB for collapse_limit' do
expect(described_class.collapse_limit).to eq(10.kilobytes)
end
end
end
describe '.new' do
context 'using a Hash' do
context 'with a small diff' do
let(:diff) { described_class.new(@raw_diff_hash) }
it 'initializes the diff' do
expect(diff.to_hash).to eq(@raw_diff_hash)
end
it 'does not prune the diff' do
expect(diff).not_to be_too_large
end
end
context 'using a diff that is too large' do
it 'prunes the diff' do
diff = described_class.new(diff: 'a' * (described_class.size_limit + 1))
expect(diff.diff).to be_empty
expect(diff).to be_too_large
end
end
end
context 'using a Rugged::Patch' do
context 'with a small diff' do
let(:diff) { described_class.new(@rugged_diff) }
it 'initializes the diff' do
expect(diff.to_hash).to eq(@raw_diff_hash)
end
it 'does not prune the diff' do
expect(diff).not_to be_too_large
end
end
context 'using a diff that is too large' do
it 'prunes the diff' do
expect_any_instance_of(String).to receive(:bytesize)
.and_return(1024 * 1024 * 1024)
diff = described_class.new(@rugged_diff)
expect(diff.diff).to be_empty
expect(diff).to be_too_large
end
end
context 'using a collapsable diff that is too large' do
before do
# The patch total size is 200, with lines between 21 and 54.
# This is a quick-and-dirty way to test this. Ideally, a new patch is
# added to the test repo with a size that falls between the real limits.
allow(Gitlab::Git::Diff).to receive(:size_limit).and_return(150)
allow(Gitlab::Git::Diff).to receive(:collapse_limit).and_return(100)
end
it 'prunes the diff as a large diff instead of as a collapsed diff' do
diff = described_class.new(@rugged_diff, expanded: false)
expect(diff.diff).to be_empty
expect(diff).to be_too_large
expect(diff).not_to be_collapsed
end
end
context 'using a large binary diff' do
it 'does not prune the diff' do
expect_any_instance_of(Rugged::Diff::Delta).to receive(:binary?)
.and_return(true)
diff = described_class.new(@rugged_diff)
expect(diff.diff).not_to be_empty
end
end
end
context 'using a GitalyClient::Diff' do
let(:diff) do
described_class.new(
Gitlab::GitalyClient::Diff.new(
to_path: ".gitmodules",
from_path: ".gitmodules",
old_mode: 0100644,
new_mode: 0100644,
from_id: '357406f3075a57708d0163752905cc1576fceacc',
to_id: '8e5177d718c561d36efde08bad36b43687ee6bf0',
patch: raw_patch
)
)
end
context 'with a small diff' do
let(:raw_patch) { @raw_diff_hash[:diff] }
it 'initializes the diff' do
expect(diff.to_hash).to eq(@raw_diff_hash)
end
it 'does not prune the diff' do
expect(diff).not_to be_too_large
end
end
context 'using a diff that is too large' do
let(:raw_patch) { 'a' * 204800 }
it 'prunes the diff' do
expect(diff.diff).to be_empty
expect(diff).to be_too_large
end
end
context 'when the patch passed is not UTF-8-encoded' do
let(:raw_patch) { @raw_diff_hash[:diff].encode(Encoding::ASCII_8BIT) }
it 'encodes diff patch to UTF-8' do
expect(diff.diff.encoding).to eq(Encoding::UTF_8)
end
end
end
end
describe 'straight diffs' do
let(:options) { { straight: true } }
let(:diffs) { described_class.between(repository, 'feature', 'master', options) }
it 'has the correct size' do
expect(diffs.size).to eq(24)
end
context 'diff' do
it 'is an instance of Diff' do
expect(diffs.first).to be_kind_of(described_class)
end
it 'has the correct new_path' do
expect(diffs.first.new_path).to eq('.DS_Store')
end
it 'has the correct diff' do
expect(diffs.first.diff).to include('Binary files /dev/null and b/.DS_Store differ')
end
end
end
describe '.between' do
let(:diffs) { described_class.between(repository, 'feature', 'master') }
subject { diffs }
it { is_expected.to be_kind_of Gitlab::Git::DiffCollection }
describe '#size' do
subject { super().size }
it { is_expected.to eq(1) }
end
context 'diff' do
subject { diffs.first }
it { is_expected.to be_kind_of described_class }
describe '#new_path' do
subject { super().new_path }
it { is_expected.to eq('files/ruby/feature.rb') }
end
describe '#diff' do
subject { super().diff }
it { is_expected.to include '+class Feature' }
end
end
end
describe '.filter_diff_options' do
let(:options) { { max_size: 100, invalid_opt: true } }
context "without default options" do
let(:filtered_options) { described_class.filter_diff_options(options) }
it "should filter invalid options" do
expect(filtered_options).not_to have_key(:invalid_opt)
end
end
context "with default options" do
let(:filtered_options) do
default_options = { max_size: 5, bad_opt: 1, ignore_whitespace: true }
described_class.filter_diff_options(options, default_options)
end
it "should filter invalid options" do
expect(filtered_options).not_to have_key(:invalid_opt)
expect(filtered_options).not_to have_key(:bad_opt)
end
it "should merge with default options" do
expect(filtered_options).to have_key(:ignore_whitespace)
end
it "should override default options" do
expect(filtered_options).to have_key(:max_size)
expect(filtered_options[:max_size]).to eq(100)
end
end
end
describe '#submodule?' do
before do
commit = repository.lookup('5937ac0a7beb003549fc5fd26fc247adbce4a52e')
@diffs = commit.parents[0].diff(commit).patches
end
it { expect(described_class.new(@diffs[0]).submodule?).to eq(false) }
it { expect(described_class.new(@diffs[1]).submodule?).to eq(true) }
end
describe '#line_count' do
it 'returns the correct number of lines' do
diff = described_class.new(@rugged_diff)
expect(diff.line_count).to eq(9)
end
end
describe '#too_large?' do
it 'returns true for a diff that is too large' do
diff = described_class.new(diff: 'a' * 204800)
expect(diff.too_large?).to eq(true)
end
it 'returns false for a diff that is small enough' do
diff = described_class.new(diff: 'a')
expect(diff.too_large?).to eq(false)
end
it 'returns true for a diff that was explicitly marked as being too large' do
diff = described_class.new(diff: 'a')
diff.too_large!
expect(diff.too_large?).to eq(true)
end
end
describe '#collapsed?' do
it 'returns false by default even on quite big diff' do
diff = described_class.new(diff: 'a' * 20480)
expect(diff).not_to be_collapsed
end
it 'returns false by default for a diff that is small enough' do
diff = described_class.new(diff: 'a')
expect(diff).not_to be_collapsed
end
it 'returns true for a diff that was explicitly marked as being collapsed' do
diff = described_class.new(diff: 'a')
diff.collapse!
expect(diff).to be_collapsed
end
end
describe '#collapsed?' do
it 'returns true for a diff that is quite large' do
diff = described_class.new({ diff: 'a' * (described_class.collapse_limit + 1) }, expanded: false)
expect(diff).to be_collapsed
end
it 'returns false for a diff that is small enough' do
diff = described_class.new({ diff: 'a' }, expanded: false)
expect(diff).not_to be_collapsed
end
end
describe '#collapse!' do
it 'prunes the diff' do
diff = described_class.new(diff: "foo\nbar")
diff.collapse!
expect(diff.diff).to eq('')
expect(diff.line_count).to eq(0)
end
end
end