#1186: print the trace with quota unknown when the quota can not be read

lib/fbe/octo.rb

@@ -170,10 +170,18 @@ def print_trace!(all: false, max: 5)
                     end
                     .take(max)
                     .join("\n")
+                  quota =
+                    begin
+                      "#{@origin.rate_limit!.remaining} quota left"
+                    rescue Octokit::ServerError, Octokit::Unauthorized, Octokit::Forbidden,
+                           Faraday::ConnectionFailed, Faraday::TimeoutError => e
+                      @loog.warn("Failed to check GitHub API quota for the trace: #{e.message}")
+                      'quota unknown'
+                    end
                   @loog.info(
                     "GitHub API trace (#{grouped.count} URLs vs #{shown.count} requests, " \
                     "#{@trace.count - shown.count} fast ones skipped, " \
-                    "#{@origin.rate_limit!.remaining} quota left):\n#{message}"
+                    "#{quota}):\n#{message}"
                   )
                   @trace.clear
                 end

test/fbe/test_octo.rb

@@ -1001,6 +1001,24 @@ def test_print_trace_counts_only_printed_requests
     assert_operator(shown + skipped, :>=, total)
   end
 
+  def test_print_trace_when_quota_can_not_be_read
+    loog = Loog::Buffer.new
+    WebMock.disable_net_connect!
+    stub_request(:get, 'https://api.github.com/rate_limit').to_return(
+      body: '{"rate":{"remaining":222}}', headers: { 'X-RateLimit-Remaining' => '222' }
+    )
+    stub_request(:get, 'https://api.github.com/repos/foo/bar').to_return(
+      body: '{"id":456,"full_name":"foo/bar"}', headers: { 'X-RateLimit-Remaining' => '220' }
+    )
+    octo = Fbe.octo(loog:, global: {}, options: Judges::Options.new)
+    octo.repository('foo/bar')
+    octo.instance_variable_get(:@origin).define_singleton_method(:rate_limit!) do
+      raise(Faraday::ConnectionFailed, 'GitHub is down')
+    end
+    octo.print_trace!(all: true)
+    assert_includes(loog.to_s, 'quota unknown')
+  end
+
   def test_print_trace
     loog = Loog::Buffer.new
     WebMock.disable_net_connect!