Perform more redactions in Redis performance bar traces

HMSET and AUTH commands were not properly redacted. This commit
does that and adds a test.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/64309

lib/peek/views/redis.rb

@@ -37,6 +37,8 @@ end
 module Peek
   module Views
     module RedisDetailed
+      REDACTED_MARKER = "<redacted>"
+
       def results
         super.merge(details: details)
       end
@@ -57,10 +59,12 @@ module Peek
       end
 
       def format_command(cmd)
+        if cmd.length >= 2 && cmd.first =~ /^auth$/i
+          cmd[-1] = REDACTED_MARKER
         # Scrub out the value of the SET calls to avoid binary
         # data or large data from spilling into the view
-        if cmd.length >= 2 && cmd.first =~ /set/i
-          cmd[-1] = "<redacted>"
+        elsif cmd.length >= 3 && cmd.first =~ /set/i
+          cmd[2..-1] = REDACTED_MARKER
         end
 
         cmd.join(' ')

spec/lib/peek/views/redis_detailed_spec.rb

@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Peek::Views::RedisDetailed do
+  let(:redis_detailed_class) do
+    Class.new do
+      include Peek::Views::RedisDetailed
+    end
+  end
+
+  subject { redis_detailed_class.new }
+
+  using RSpec::Parameterized::TableSyntax
+
+  where(:cmd, :expected) do
+    [:auth, 'test'] | 'auth <redacted>'
+    [:set, 'key', 'value'] | 'set key <redacted>'
+    [:set, 'bad'] | 'set bad'
+    [:hmset, 'key1', 'value1', 'key2', 'value2'] | 'hmset key1 <redacted>'
+    [:get, 'key'] | 'get key'
+  end
+
+  with_them do
+    it 'scrubs Redis commands', :request_store do
+      subject.detail_store << { cmd: cmd, duration: 1.second }
+
+      expect(subject.details.count).to eq(1)
+      expect(subject.details.first)
+        .to eq({
+                 cmd: expected,
+                 duration: 1000
+               })
+    end
+  end
+end