fix logging by merging channels into reader

engine/util_test.go

@@ -4,8 +4,51 @@
 
 package engine
 
-import "testing"
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"io"
+	"testing"
+	"time"
+)
 
 func TestChansToReader(t *testing.T) {
+	ctx := context.Background()
 
+	stdout := make(chan string, 1000)
+
+	logs := NewChansReadClose(ctx, stdout)
+
+	mockLogs := []string{
+		"\u0008",
+		"this is a log 1\n",
+		"this is a log 2\n",
+		"this is a log 3\n",
+		"this is a log 4\n",
+		"this is a log 5\n",
+		"this is a log 6\n",
+		"this is a log 7\n",
+		"this is a log 8\n",
+		"this is a log 9\n",
+		"this is a log 10\n",
+		"this is a log 11\n",
+		"this is a log 12\n",
+	}
+
+	go func(mock []string) {
+		for i := range mock {
+			time.Sleep(2)
+			fmt.Printf("sending [mock=%s]\n", mock[i])
+			stdout <- mock[i]
+		}
+		fmt.Println("closing channel...")
+		logs.Close()
+	}(mockLogs)
+
+	fmt.Println("starting std copy...")
+	output := bytes.NewBuffer([]byte{})
+	io.Copy(output, logs)
+
+	fmt.Print(output.String())
 }