Fixed action name in config

Fixed the keybind action name to section_header_num.
Added configuration yaml test.
Added test for names in config.

main_test.go

@@ -0,0 +1,63 @@
+package main
+
+import (
+	"bytes"
+	"io"
+	"os"
+	"strings"
+	"testing"
+)
+
+func Test_initConfig(t *testing.T) {
+	t.Parallel()
+	tests := []struct {
+		name    string
+		cfgFile string
+		errStr  string
+	}{
+		{
+			name:    "test-ov.yaml",
+			cfgFile: "ov.yaml",
+			errStr:  "",
+		},
+		{
+			name:    "test-ov-less.yaml",
+			cfgFile: "ov-less.yaml",
+			errStr:  "",
+		},
+		{
+			name:    "no-file.yaml",
+			cfgFile: "no-file.yaml",
+			errStr:  "no such file or directory",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			cfgFile = tt.cfgFile
+			// Backup original stderr
+			origStderr := os.Stderr
+
+			// Create a buffer to capture stderr output
+			r, w, _ := os.Pipe()
+			os.Stderr = w
+
+			initConfig()
+			w.Close()
+			// Restore original stderr
+			os.Stderr = origStderr
+
+			// Read captured stderr output
+			var buf bytes.Buffer
+			io.Copy(&buf, r)
+			capturedStderr := buf.String()
+
+			// Now you can assert capturedStderr
+			// For example, check if it contains a specific error message
+			if !strings.Contains(capturedStderr, tt.errStr) {
+				t.Errorf("initConfig() error = %v, wantErr %v", capturedStderr, tt.errStr)
+			}
+			//keyBind := oviewer.GetKeyBinds(config)
+			//log.Println(oviewer.KeyBindString(keyBind))
+		})
+	}
+}