Actually increment the PageLimiter counter

app/controllers/concerns/page_limiter.rb

@@ -63,6 +63,6 @@ module PageLimiter
       controller: params[:controller],
       action: params[:action],
       bot: dd.bot?
-    )
+    ).increment
   end
 end

spec/controllers/concerns/page_limiter_spec.rb

@@ -71,19 +71,23 @@ describe PageLimiter do
   describe "#default_page_out_of_bounds_response" do
     subject { instance.send(:default_page_out_of_bounds_response) }
 
-    after do
-      subject
-    end
-
     it "returns a bad_request header" do
       expect(instance).to receive(:head).with(:bad_request)
+
+      subject
     end
   end
 
   describe "#record_page_limit_interception" do
     subject { instance.send(:record_page_limit_interception) }
 
-    it "records a metric counter" do
+    let(:counter) { double("counter", increment: true) }
+
+    before do
+      allow(Gitlab::Metrics).to receive(:counter) { counter }
+    end
+
+    it "creates a metric counter" do
       expect(Gitlab::Metrics).to receive(:counter).with(
         :gitlab_page_out_of_bounds,
         controller: "explore/projects",
@@ -93,5 +97,11 @@ describe PageLimiter do
 
       subject
     end
+
+    it "increments the counter" do
+      expect(counter).to receive(:increment)
+
+      subject
+    end
   end
 end

spec/controllers/explore/projects_controller_spec.rb

@@ -90,8 +90,12 @@ describe Explore::ProjectsController do
         end
 
         describe "metrics recording" do
-          after do
-            get endpoint, params: { page: page_limit + 1 }
+          subject { get endpoint, params: { page: page_limit + 1 } }
+
+          let(:counter) { double("counter", increment: true) }
+
+          before do
+            allow(Gitlab::Metrics).to receive(:counter) { counter }
           end
 
           it "records the interception" do
@@ -101,6 +105,8 @@ describe Explore::ProjectsController do
               action: endpoint.to_s,
               bot: false
             )
+
+            subject
           end
         end
       end