From cad8bb187deabcb4fc8ee9b58442845658205ee5 Mon Sep 17 00:00:00 2001
From: Douglas Barbosa Alexandre <dbalexandre@gmail.com>
Date: Tue, 25 Jun 2019 19:26:29 -0300
Subject: [PATCH] Parse the cached value when the it is false

---
 lib/gitlab/json_cache.rb           |  2 +-
 spec/lib/gitlab/json_cache_spec.rb | 35 +++++++++++++++++++++++++++++-
 2 files changed, 35 insertions(+), 2 deletions(-)

diff --git a/lib/gitlab/json_cache.rb b/lib/gitlab/json_cache.rb
index d01183d7845..84c6817f3c7 100644
--- a/lib/gitlab/json_cache.rb
+++ b/lib/gitlab/json_cache.rb
@@ -34,7 +34,7 @@ module Gitlab
 
     def read(key, klass = nil)
       value = backend.read(cache_key(key))
-      value = parse_value(value, klass) if value
+      value = parse_value(value, klass) unless value.nil?
       value
     end
 
diff --git a/spec/lib/gitlab/json_cache_spec.rb b/spec/lib/gitlab/json_cache_spec.rb
index 59160741c45..39cdd42088e 100644
--- a/spec/lib/gitlab/json_cache_spec.rb
+++ b/spec/lib/gitlab/json_cache_spec.rb
@@ -129,19 +129,52 @@ describe Gitlab::JsonCache do
         .with(expanded_key)
         .and_return(nil)
 
+      expect(ActiveSupport::JSON).not_to receive(:decode)
       expect(cache.read(key)).to be_nil
     end
 
-    context 'when the cached value is a boolean' do
+    context 'when the cached value is true' do
       it 'parses the cached value' do
         allow(backend).to receive(:read)
           .with(expanded_key)
           .and_return(true)
 
+        expect(ActiveSupport::JSON).to receive(:decode).with("true").and_call_original
         expect(cache.read(key, BroadcastMessage)).to eq(true)
       end
     end
 
+    context 'when the cached value is false' do
+      it 'parses the cached value' do
+        allow(backend).to receive(:read)
+          .with(expanded_key)
+          .and_return(false)
+
+        expect(ActiveSupport::JSON).to receive(:decode).with("false").and_call_original
+        expect(cache.read(key, BroadcastMessage)).to eq(false)
+      end
+    end
+
+    context 'when the cached value is a JSON true value' do
+      it 'parses the cached value' do
+        allow(backend).to receive(:read)
+          .with(expanded_key)
+          .and_return("true")
+
+        expect(cache.read(key, BroadcastMessage)).to eq(true)
+      end
+    end
+
+    context 'when the cached value is a JSON false value' do
+      it 'parses the cached value' do
+        allow(backend).to receive(:read)
+          .with(expanded_key)
+          .and_return("false")
+
+        expect(cache.read(key, BroadcastMessage)).to eq(false)
+      end
+    end
+
     context 'when the cached value is a hash' do
       it 'parses the cached value' do
         allow(backend).to receive(:read)