[skip ci] improve documentation and add example

doc.go

@@ -4,9 +4,9 @@ package ghz can be used to perform benchmarking and load testing against gRPC se
 	report, err := runner.Run(
 		"helloworld.Greeter.SayHello",
 		"localhost:50051",
-		WithProtoFile("greeter.proto", []string{}),
-		WithDataFromFile("data.json"),
-		WithInsecure(true),
+		runner.WithProtoFile("greeter.proto", []string{}),
+		runner.WithDataFromFile("data.json"),
+		runner.WithInsecure(true),
 	)
 */
 package ghz

runner/example_test.go

@@ -0,0 +1,31 @@
+package runner_test
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/bojand/ghz/printer"
+	"github.com/bojand/ghz/runner"
+)
+
+func main() {
+	report, err := runner.Run(
+		"helloworld.Greeter.SayHello",
+		"localhost:50051",
+		runner.WithProtoFile("../testdata/greeter.proto", []string{}),
+		runner.WithDataFromFile("../testdata/data.json"),
+		runner.WithInsecure(true),
+	)
+
+	if err != nil {
+		fmt.Println(err.Error())
+		os.Exit(1)
+	}
+
+	printer := printer.ReportPrinter{
+		Out:    os.Stdout,
+		Report: report,
+	}
+
+	printer.Print("pretty")
+}

www/docs/package.md

@@ -11,19 +11,30 @@ package main
 
 import (
 	"fmt"
+	"os"
+
+	"github.com/bojand/ghz/printer"
 	"github.com/bojand/ghz/runner"
 )
 
 func main() {
-    report, err := runner.Run(
+	report, err := runner.Run(
 		"helloworld.Greeter.SayHello",
 		"localhost:50051",
-		WithProtoFile("greeter.proto", []string{}),
-		WithDataFromFile("data.json"),
-		WithInsecure(true),
-    )
-
-    fmt.Println(report)
-}
+		runner.WithProtoFile("greeter.proto", []string{}),
+		runner.WithDataFromFile("data.json"),
+		runner.WithInsecure(true),
+	)
+
+	if err != nil {
+		fmt.Println(err.Error())
+	}
 
+	printer := printer.ReportPrinter{
+		Out:    os.Stdout,
+		Report: report,
+	}
+
+	printer.Print("pretty")
+}
 ```