e2e: move funs of framework/viperconfig to e2e

Signed-off-by: clarklee92 <clarklee1992@hotmail.com>

test/e2e/viperconfig_test.go

@@ -0,0 +1,72 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package e2e
+
+import (
+	"flag"
+	"io/ioutil"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+	"k8s.io/kubernetes/test/e2e/framework/config"
+)
+
+func TestViperConfig(t *testing.T) {
+	flags := flag.NewFlagSet("test", 0)
+	type Context struct {
+		Bool     bool          `default:"true"`
+		Duration time.Duration `default:"1ms"`
+		Float64  float64       `default:"1.23456789"`
+		String   string        `default:"hello world"`
+		Int      int           `default:"-1" usage:"some number"`
+		Int64    int64         `default:"-1234567890123456789"`
+		Uint     uint          `default:"1"`
+		Uint64   uint64        `default:"1234567890123456789"`
+	}
+	var context Context
+	require.NotPanics(t, func() {
+		config.AddOptionsToSet(flags, &context, "")
+	})
+
+	viperConfig := `
+bool: false
+duration: 1s
+float64: -1.23456789
+string: pong
+int: -2
+int64: -9123456789012345678
+uint: 2
+uint64: 9123456789012345678
+`
+	tmpfile, err := ioutil.TempFile("", "viperconfig-*.yaml")
+	require.NoError(t, err, "temp file")
+	defer os.Remove(tmpfile.Name())
+	if _, err := tmpfile.Write([]byte(viperConfig)); err != nil {
+		require.NoError(t, err, "write config")
+	}
+	require.NoError(t, tmpfile.Close(), "close temp file")
+
+	require.NoError(t, viperizeFlags(tmpfile.Name(), "", flags), "read config file")
+	require.Equal(t,
+		Context{false, time.Second, -1.23456789, "pong",
+			-2, -9123456789012345678, 2, 9123456789012345678,
+		},
+		context,
+		"values from viper must match")
+}