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
|
# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Diff::HighlightCache, :clean_gitlab_redis_cache do
let(:merge_request) { create(:merge_request_with_diffs) }
let(:diff_hash) do
{ ".gitignore-false-false-false" =>
[{ line_code: nil, rich_text: nil, text: "@@ -17,3 +17,4 @@ rerun.txt", type: "match", index: 0, old_pos: 17, new_pos: 17 },
{ line_code: "a5cc2925ca8258af241be7e5b0381edf30266302_17_17",
rich_text: " <span id=\"LC17\" class=\"line\" lang=\"plaintext\">pickle-email-*.html</span>\n",
text: " pickle-email-*.html",
type: nil,
index: 1,
old_pos: 17,
new_pos: 17 },
{ line_code: "a5cc2925ca8258af241be7e5b0381edf30266302_18_18",
rich_text: " <span id=\"LC18\" class=\"line\" lang=\"plaintext\">.project</span>\n",
text: " .project",
type: nil,
index: 2,
old_pos: 18,
new_pos: 18 },
{ line_code: "a5cc2925ca8258af241be7e5b0381edf30266302_19_19",
rich_text: " <span id=\"LC19\" class=\"line\" lang=\"plaintext\">config/initializers/secret_token.rb</span>\n",
text: " config/initializers/secret_token.rb",
type: nil,
index: 3,
old_pos: 19,
new_pos: 19 },
{ line_code: "a5cc2925ca8258af241be7e5b0381edf30266302_20_20",
rich_text: "+<span id=\"LC20\" class=\"line\" lang=\"plaintext\">.DS_Store</span>",
text: "+.DS_Store",
type: "new",
index: 4,
old_pos: 20,
new_pos: 20 }] }
end
let(:cache_key) { cache.key }
subject(:cache) { described_class.new(merge_request.diffs) }
describe '#decorate' do
# Manually creates a Diff::File object to avoid triggering the cache on
# the FileCollection::MergeRequestDiff
let(:diff_file) do
diffs = merge_request.diffs
raw_diff = diffs.diffable.raw_diffs(diffs.diff_options.merge(paths: ['CHANGELOG'])).first
Gitlab::Diff::File.new(raw_diff,
repository: diffs.project.repository,
diff_refs: diffs.diff_refs,
fallback_diff_refs: diffs.fallback_diff_refs)
end
before do
cache.write_if_empty
cache.decorate(diff_file)
end
it 'does not calculate highlighting when reading from cache' do
expect_any_instance_of(Gitlab::Diff::Highlight).not_to receive(:highlight)
diff_file.highlighted_diff_lines
end
it 'assigns highlighted diff lines to the DiffFile' do
expect(diff_file.highlighted_diff_lines.size).to be > 5
end
it 'assigns highlighted diff lines which rich_text are HTML-safe' do
rich_texts = diff_file.highlighted_diff_lines.map(&:rich_text)
expect(rich_texts).to all(be_html_safe)
end
end
shared_examples 'caches missing entries' do
it 'filters the key/value list of entries to be caches for each invocation' do
expect(cache).to receive(:write_to_redis_hash)
.with(hash_including(*paths))
.once
.and_call_original
2.times { cache.write_if_empty }
end
it 'reads from cache once' do
expect(cache).to receive(:read_cache).once.and_call_original
cache.write_if_empty
end
end
describe '#write_if_empty' do
it_behaves_like 'caches missing entries' do
let(:paths) { merge_request.diffs.raw_diff_files.select(&:text?).map(&:file_path) }
end
it 'updates memory usage metrics if Redis version >= 4' do
allow_next_instance_of(Redis) do |redis|
allow(redis).to receive(:info).and_return({ "redis_version" => "4.0.0" })
expect(described_class.gitlab_redis_diff_caching_memory_usage_bytes)
.to receive(:observe).and_call_original
cache.send(:write_to_redis_hash, diff_hash)
end
end
it 'does not update memory usage metrics if Redis version < 4' do
allow_next_instance_of(Redis) do |redis|
allow(redis).to receive(:info).and_return({ "redis_version" => "3.0.0" })
expect(described_class.gitlab_redis_diff_caching_memory_usage_bytes)
.not_to receive(:observe)
cache.send(:write_to_redis_hash, diff_hash)
end
end
context 'different diff_collections for the same diffable' do
before do
cache.write_if_empty
end
it 'writes an uncached files in the collection to the same redis hash' do
Gitlab::Redis::Cache.with { |r| r.hdel(cache_key, "files/whitespace") }
expect { cache.write_if_empty }
.to change { Gitlab::Redis::Cache.with { |r| r.hgetall(cache_key) } }
end
end
context 'when cache initialized with MergeRequestDiffBatch' do
let(:merge_request_diff_batch) do
Gitlab::Diff::FileCollection::MergeRequestDiffBatch.new(
merge_request.merge_request_diff,
1,
10,
diff_options: nil)
end
it_behaves_like 'caches missing entries' do
let(:cache) { described_class.new(merge_request_diff_batch) }
let(:paths) { merge_request_diff_batch.raw_diff_files.select(&:text?).map(&:file_path) }
end
end
end
describe '#write_to_redis_hash' do
it 'creates or updates a Redis hash' do
expect { cache.send(:write_to_redis_hash, diff_hash) }
.to change { Gitlab::Redis::Cache.with { |r| r.hgetall(cache_key) } }
end
end
describe '#clear' do
it 'clears cache' do
expect_any_instance_of(Redis).to receive(:del).with(cache_key)
cache.clear
end
end
describe "GZip usage" do
let(:diff_file) do
diffs = merge_request.diffs
raw_diff = diffs.diffable.raw_diffs(diffs.diff_options.merge(paths: ['CHANGELOG'])).first
Gitlab::Diff::File.new(raw_diff,
repository: diffs.project.repository,
diff_refs: diffs.diff_refs,
fallback_diff_refs: diffs.fallback_diff_refs)
end
it "uses ActiveSupport::Gzip when reading from the cache" do
expect(ActiveSupport::Gzip).to receive(:decompress).at_least(:once).and_call_original
cache.write_if_empty
cache.decorate(diff_file)
end
it "uses ActiveSupport::Gzip to compress data when writing to cache" do
expect(ActiveSupport::Gzip).to receive(:compress).and_call_original
cache.send(:write_to_redis_hash, diff_hash)
end
end
describe 'metrics' do
let(:transaction) { Gitlab::Metrics::WebTransaction.new({} ) }
before do
allow(cache).to receive(:current_transaction).and_return(transaction)
end
it 'observes :gitlab_redis_diff_caching_memory_usage_bytes' do
expect(transaction)
.to receive(:observe).with(:gitlab_redis_diff_caching_memory_usage_bytes, a_kind_of(Numeric))
cache.write_if_empty
end
end
end
|