Add test for determining the container dumper type

dump_test.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/container"
+	"reflect"
+	"testing"
+)
+
+func TestNewDumperFromContainer(t *testing.T) {
+	tests := []struct {
+		name      string
+		container *types.ContainerJSON
+		want      string
+	}{
+		{
+			name:      "mysql",
+			container: &types.ContainerJSON{Config: &container.Config{Image: "mysql"}},
+			want:      "MysqlDumper",
+		},
+		{
+			name:      "mariadb",
+			container: &types.ContainerJSON{Config: &container.Config{Image: "mysql"}},
+			want:      "MysqlDumper",
+		},
+		{
+			name:      "postgres",
+			container: &types.ContainerJSON{Config: &container.Config{Image: "postgres"}},
+			want:      "PostgresDumper",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := NewDumperFromContainer(tt.container)
+			if reflect.TypeOf(got).Elem().Name() != tt.want {
+				t.Errorf("NewDumperFromContainer() is %s, want %s", got, tt.want)
+			}
+		})
+	}
+}