Backport: Change negated active job matcher (#2069)

This is a partial backport of #2069 that doesn't include changes on
"have_enqueued_mail" tests.

When expecting no job to be enqueued, the matcher would expect exactly
one job not to have been enqueued. This commit changes so that it now expects
no jobs to have been enqueued.

lib/rspec/rails/matchers/active_job.rb

@@ -197,6 +197,12 @@ def matches?(proc)
 
             check(in_block_jobs)
           end
+
+          def does_not_match?(proc)
+            set_expected_number(:at_least, 1)
+
+            !matches?(proc)
+          end
         end
 
         # @private
@@ -205,6 +211,12 @@ def matches?(job)
             @job = job
             check(queue_adapter.enqueued_jobs)
           end
+
+          def does_not_match?(proc)
+            set_expected_number(:at_least, 1)
+
+            !matches?(proc)
+          end
         end
       end
 

spec/rspec/rails/matchers/active_job_spec.rb

@@ -122,7 +122,16 @@ def self.name; "LoggingJob"; end
     it "fails when negated and job is enqueued" do
       expect {
         expect { heavy_lifting_job.perform_later }.not_to have_enqueued_job
-      }.to raise_error(/expected not to enqueue exactly 1 jobs, but enqueued 1/)
+      }.to raise_error(/expected not to enqueue at least 1 jobs, but enqueued 1/)
+    end
+
+    it "fails when negated and several jobs enqueued" do
+      expect {
+        expect {
+          heavy_lifting_job.perform_later
+          heavy_lifting_job.perform_later
+        }.not_to have_enqueued_job
+      }.to raise_error(/expected not to enqueue at least 1 jobs, but enqueued 2/)
     end
 
     it "passes with job name" do
@@ -344,5 +353,13 @@ def self.name; "LoggingJob"; end
         expect(heavy_lifting_job).to have_been_enqueued
       }.to raise_error(/expected to enqueue exactly 1 jobs, but enqueued 0/)
     end
+
+    it "fails when negated and several jobs enqueued" do
+      heavy_lifting_job.perform_later
+      heavy_lifting_job.perform_later
+      expect {
+        expect(heavy_lifting_job).not_to have_been_enqueued
+      }.to raise_error(/expected not to enqueue at least 1 jobs, but enqueued 2/)
+    end
   end
 end