diff --git a/browser_test.go b/browser_test.go
new file mode 100644
index 0000000..1110061
--- /dev/null
+++ b/browser_test.go
@@ -0,0 +1,3 @@
+package main
+
+
diff --git a/config.go b/config.go
index 020b0ce..ffef6d5 100644
--- a/config.go
+++ b/config.go
@@ -2,7 +2,6 @@ package main
 
 import (
 	"errors"
-	"fmt"
 	"log"
 	"os"
 	"strconv"
@@ -10,11 +9,11 @@ import (
 	"github.com/alyu/configparser"
 )
 
+//str2int
 func str2int(strnum string) int {
 	i, err := strconv.Atoi(strnum)
 	if err != nil {
-		fmt.Println(err)
-		os.Exit(2)
+		return 9999
 	}
 	return i
 }
diff --git a/config_test.go b/config_test.go
new file mode 100644
index 0000000..6c46a6c
--- /dev/null
+++ b/config_test.go
@@ -0,0 +1,60 @@
+package main
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+//str2int
+func Test_str2int(t *testing.T){
+	t.Run("Testing normal integer:", teststr2intFunc("5", 5))
+	t.Run("Testing large integer:", teststr2intFunc("4294967296",4294967296))
+	t.Run("Testing negative integer:", teststr2intFunc("-5", -5))
+	t.Run("Testing invalid input:", teststr2intFunc("a", 9999))
+}
+
+func teststr2intFunc(numstr string, expected int) func(*testing.T) {
+	return func(t *testing.T) {
+		if !assert.Equal(t, expected, str2int(numstr)) {
+			t.Error(fmt.Sprintf("%d does not equal %d", str2int(numstr), expected))
+		}
+	}
+}
+
+func Test_api(t *testing.T) {
+	expectedApi := "all.api.radio-browser.info"
+	api := api()
+	pass := assert.Equal(t, expectedApi, api)
+	if !pass {
+		t.Error(fmt.Sprintf("`%s does not match %s", api, expectedApi))
+	}
+}
+
+func Test_player(t *testing.T) {
+	expectedPlayer := "mpv"
+	player := player()
+	pass := assert.Equal(t, expectedPlayer, player)
+	if !pass {
+		t.Error(fmt.Sprintf("`%s does not match %s", player, expectedPlayer))
+	}
+}
+
+func Test_options(t *testing.T) {
+	expectedOptions := "--no-video"
+	options := options()
+	pass := assert.Equal(t, expectedOptions, options)
+	if !pass {
+		t.Error(fmt.Sprintf("`%s does not match %s", options, expectedOptions))
+	}
+}
+
+func Test_maxitems(t *testing.T) {
+	expectedMaxItems := 9999
+	maxItems := maxitems()
+	pass := assert.Equal(t, expectedMaxItems, maxItems)
+	if !pass {
+		t.Error(fmt.Sprintf("`%d does not match %d", maxItems, expectedMaxItems))
+	}
+}
\ No newline at end of file
diff --git a/go.mod b/go.mod
index 125b23c..02ca223 100644
--- a/go.mod
+++ b/go.mod
@@ -5,4 +5,5 @@ go 1.16
 require (
 	github.com/alyu/configparser v0.0.0-20191103060215-744e9a66e7bc
 	github.com/dixonwille/wmenu/v5 v5.1.0
+	github.com/stretchr/testify v1.4.0
 )