From 41dc6e7f5c5c241de67aab2071e9995e04cb8614 Mon Sep 17 00:00:00 2001
From: Rob Playford <rob.playford@gmail.com>
Date: Mon, 21 Dec 2020 12:16:54 +0000
Subject: [PATCH] add test for proof of fix

---
 cobra/cmd/root_test.go | 72 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 cobra/cmd/root_test.go

diff --git a/cobra/cmd/root_test.go b/cobra/cmd/root_test.go
new file mode 100644
index 000000000..2e89b04a7
--- /dev/null
+++ b/cobra/cmd/root_test.go
@@ -0,0 +1,72 @@
+package cmd
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+
+	homedir "github.com/mitchellh/go-homedir"
+	"github.com/spf13/viper"
+)
+
+func TestConfigFileDefaultFormat(t *testing.T) {
+	var (
+		defaultConfigName        = ".cobra"
+		configFileTestSuffix     = ".test.bak"
+		testKey                  = "aKey"
+		testValue0               = "aValue0"
+		testValue1               = "aValue1"
+		defaultConfigFileContent = []byte(fmt.Sprintf(
+			"---\n%s:\n  - %s\n  - %s\n",
+			testKey, testValue0, testValue1,
+		))
+		home string
+		err  error
+	)
+
+	if home, err = homedir.Dir(); err != nil {
+		t.Fatalf("Error discovering home directory: %v", err)
+	}
+
+	configFilePath := filepath.Join(home, defaultConfigName)
+
+	// if file already exists, move to backup
+	if fileInfo, _ := os.Stat(configFilePath); fileInfo != nil {
+		configFilePathBackup := configFilePath + configFileTestSuffix
+		os.Remove(configFilePathBackup)
+		if err = os.Rename(configFilePath, configFilePathBackup); err != nil {
+			t.Fatalf("Error backing up existing config file '%v' :'%v'", configFilePath, err)
+		}
+		// defer moving backup back to original
+		defer func() {
+			os.Remove(configFilePath)
+			os.Rename(configFilePathBackup, configFilePath)
+		}()
+	}
+
+	// create test file
+	os.Remove(configFilePath)
+	ioutil.WriteFile(configFilePath, defaultConfigFileContent, 0666)
+	if _, err = os.Stat(configFilePath); os.IsNotExist(err) {
+		t.Fatalf("Expected to find file '%s', but got '%v'", configFilePath, err)
+	}
+
+	// attempt to use config file
+	initConfig()
+
+	result := viper.GetStringSlice(testKey)
+	expected := []string{testValue0, testValue1}
+	if len(result) != len(expected) {
+		t.Fatalf("Expected '%T' with %d elements, but got '%v'", expected, len(expected), result)
+	}
+	for i := range result {
+		if result[i] != expected[i] {
+			t.Fatalf("Expected '%v', but got '%v'", expected, result)
+		}
+	}
+
+	// delete test file
+	os.Remove(configFilePath)
+}