Add parameters to specify password (#1868)

* Add parameters to specify password

Signed-off-by: Till Faelligen <tfaelligen@gmail.com>

* Fix typo

* Add testdata

* Use go1.13 compatible way to read files

cmd/create-account/main_test.go

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"bytes"
+	"io"
+	"testing"
+)
+
+func Test_getPassword(t *testing.T) {
+	type args struct {
+		password *string
+		pwdFile  *string
+		pwdStdin *bool
+		askPass  *bool
+		reader   io.Reader
+	}
+
+	pass := "mySecretPass"
+	passwordFile := "testdata/my.pass"
+	passwordStdin := true
+	reader := &bytes.Buffer{}
+	_, err := reader.WriteString(pass)
+	if err != nil {
+		t.Errorf("unable to write to buffer: %+v", err)
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{
+			name: "no password defined",
+			args: args{},
+			want: "",
+		},
+		{
+			name: "password defined",
+			args: args{password: &pass},
+			want: pass,
+		},
+		{
+			name: "pwdFile defined",
+			args: args{pwdFile: &passwordFile},
+			want: pass,
+		},
+		{
+			name: "read pass from stdin defined",
+			args: args{
+				pwdStdin: &passwordStdin,
+				reader:   reader,
+			},
+			want: pass,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := getPassword(tt.args.password, tt.args.pwdFile, tt.args.pwdStdin, tt.args.askPass, tt.args.reader); got != tt.want {
+				t.Errorf("getPassword() = '%v', want '%v'", got, tt.want)
+			}
+		})
+	}
+}