Add coverage for Async::Container::Statistics.

Author: ioquatix

test/async/container/statistics.rb

@@ -0,0 +1,66 @@
+# frozen_string_literal: true
+
+# Released under the MIT License.
+# Copyright, 2025, by Samuel Williams.
+
+require "async/container/statistics"
+
+describe Async::Container::Statistics do
+	let(:statistics) {subject.new}
+	
+	with "#spawn!" do
+		it "can count spawns" do
+			expect(statistics.spawns).to be == 0
+			
+			statistics.spawn!
+			
+			expect(statistics.spawns).to be == 1
+		end
+	end
+	
+	with "#restart!" do
+		it "can count restarts" do
+			expect(statistics.restarts).to be == 0
+			
+			statistics.restart!
+			
+			expect(statistics.restarts).to be == 1
+		end
+	end
+	
+	with "#failure!" do
+		it "can count failures" do
+			expect(statistics.failures).to be == 0
+			
+			statistics.failure!
+			
+			expect(statistics.failures).to be == 1
+		end
+	end
+	
+	with "#failed?" do
+		it "can check for failures" do
+			expect(statistics).not.to be(:failed?)
+			
+			statistics.failure!
+			
+			expect(statistics).to be(:failed?)
+		end
+	end
+	
+	with "#<<" do
+		it "can append statistics" do
+			other = subject.new
+			
+			other.spawn!
+			other.restart!
+			other.failure!
+			
+			statistics << other
+			
+			expect(statistics.spawns).to be == 1
+			expect(statistics.restarts).to be == 1
+			expect(statistics.failures).to be == 1
+		end
+	end
+end