Add function to merge results from multiple run_and_capture invocations

Author: hlovdal

lib/arduino_ci/host.rb

@@ -35,6 +35,16 @@ def self.run_and_capture(*args, **kwargs)
       { out: stdout, err: stderr, success: status.exitstatus.zero? }
     end
 
+    def self.merge_capture_results(args)
+      result = { out: "", err: "", success: true }
+      args.each do |a|
+        result[:out] = result[:out] + a[:out]
+        result[:err] = result[:err] + a[:err]
+        result[:success] = a[:success] unless a[:success]
+      end
+      result
+    end
+
     def self.run_and_output(*args, **kwargs)
       system(*args, **kwargs)
     end

spec/host_spec.rb

@@ -71,4 +71,23 @@ def with_tmpdir(path)
     end
   end
 
+  context "merge_capture_results" do
+    it "merges results" do
+      a1 = { out: "one", err: "ONE", success: true }
+      a2 = { out: "two", err: "TWO", success: false }
+      a3 = { out: "three", err: "THREE", success: true }
+      res = ArduinoCI::Host.merge_capture_results([a1, a2, a3])
+      expect(res[:out]).to eq("onetwothree")
+      expect(res[:err]).to eq("ONETWOTHREE")
+      expect(res[:success]).to eq(false)
+    end
+
+    it "handles empty input" do
+      res = ArduinoCI::Host.merge_capture_results([])
+      expect(res[:out]).to eq("")
+      expect(res[:err]).to eq("")
+      expect(res[:success]).to eq(true)
+    end
+  end
+
 end