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diff --git a/vendor/github.com/spf13/pflag/string_array_test.go b/vendor/github.com/spf13/pflag/string_array_test.go
new file mode 100644
index 00000000..1ceac8c6
--- /dev/null
+++ b/vendor/github.com/spf13/pflag/string_array_test.go
@@ -0,0 +1,233 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package pflag
+
+import (
+	"fmt"
+	"testing"
+)
+
+func setUpSAFlagSet(sap *[]string) *FlagSet {
+	f := NewFlagSet("test", ContinueOnError)
+	f.StringArrayVar(sap, "sa", []string{}, "Command separated list!")
+	return f
+}
+
+func setUpSAFlagSetWithDefault(sap *[]string) *FlagSet {
+	f := NewFlagSet("test", ContinueOnError)
+	f.StringArrayVar(sap, "sa", []string{"default", "values"}, "Command separated list!")
+	return f
+}
+
+func TestEmptySA(t *testing.T) {
+	var sa []string
+	f := setUpSAFlagSet(&sa)
+	err := f.Parse([]string{})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+
+	getSA, err := f.GetStringArray("sa")
+	if err != nil {
+		t.Fatal("got an error from GetStringArray():", err)
+	}
+	if len(getSA) != 0 {
+		t.Fatalf("got sa %v with len=%d but expected length=0", getSA, len(getSA))
+	}
+}
+
+func TestEmptySAValue(t *testing.T) {
+	var sa []string
+	f := setUpSAFlagSet(&sa)
+	err := f.Parse([]string{"--sa="})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+
+	getSA, err := f.GetStringArray("sa")
+	if err != nil {
+		t.Fatal("got an error from GetStringArray():", err)
+	}
+	if len(getSA) != 0 {
+		t.Fatalf("got sa %v with len=%d but expected length=0", getSA, len(getSA))
+	}
+}
+
+func TestSADefault(t *testing.T) {
+	var sa []string
+	f := setUpSAFlagSetWithDefault(&sa)
+
+	vals := []string{"default", "values"}
+
+	err := f.Parse([]string{})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for i, v := range sa {
+		if vals[i] != v {
+			t.Fatalf("expected sa[%d] to be %s but got: %s", i, vals[i], v)
+		}
+	}
+
+	getSA, err := f.GetStringArray("sa")
+	if err != nil {
+		t.Fatal("got an error from GetStringArray():", err)
+	}
+	for i, v := range getSA {
+		if vals[i] != v {
+			t.Fatalf("expected sa[%d] to be %s from GetStringArray but got: %s", i, vals[i], v)
+		}
+	}
+}
+
+func TestSAWithDefault(t *testing.T) {
+	var sa []string
+	f := setUpSAFlagSetWithDefault(&sa)
+
+	val := "one"
+	arg := fmt.Sprintf("--sa=%s", val)
+	err := f.Parse([]string{arg})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+
+	if len(sa) != 1 {
+		t.Fatalf("expected number of values to be %d but %d", 1, len(sa))
+	}
+
+	if sa[0] != val {
+		t.Fatalf("expected value to be %s but got: %s", sa[0], val)
+	}
+
+	getSA, err := f.GetStringArray("sa")
+	if err != nil {
+		t.Fatal("got an error from GetStringArray():", err)
+	}
+
+	if len(getSA) != 1 {
+		t.Fatalf("expected number of values to be %d but %d", 1, len(getSA))
+	}
+
+	if getSA[0] != val {
+		t.Fatalf("expected value to be %s but got: %s", getSA[0], val)
+	}
+}
+
+func TestSACalledTwice(t *testing.T) {
+	var sa []string
+	f := setUpSAFlagSet(&sa)
+
+	in := []string{"one", "two"}
+	expected := []string{"one", "two"}
+	argfmt := "--sa=%s"
+	arg1 := fmt.Sprintf(argfmt, in[0])
+	arg2 := fmt.Sprintf(argfmt, in[1])
+	err := f.Parse([]string{arg1, arg2})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+
+	if len(expected) != len(sa) {
+		t.Fatalf("expected number of sa to be %d but got: %d", len(expected), len(sa))
+	}
+	for i, v := range sa {
+		if expected[i] != v {
+			t.Fatalf("expected sa[%d] to be %s but got: %s", i, expected[i], v)
+		}
+	}
+
+	values, err := f.GetStringArray("sa")
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+
+	if len(expected) != len(values) {
+		t.Fatalf("expected number of values to be %d but got: %d", len(expected), len(sa))
+	}
+	for i, v := range values {
+		if expected[i] != v {
+			t.Fatalf("expected got sa[%d] to be %s but got: %s", i, expected[i], v)
+		}
+	}
+}
+
+func TestSAWithSpecialChar(t *testing.T) {
+	var sa []string
+	f := setUpSAFlagSet(&sa)
+
+	in := []string{"one,two", `"three"`, `"four,five",six`, "seven eight"}
+	expected := []string{"one,two", `"three"`, `"four,five",six`, "seven eight"}
+	argfmt := "--sa=%s"
+	arg1 := fmt.Sprintf(argfmt, in[0])
+	arg2 := fmt.Sprintf(argfmt, in[1])
+	arg3 := fmt.Sprintf(argfmt, in[2])
+	arg4 := fmt.Sprintf(argfmt, in[3])
+	err := f.Parse([]string{arg1, arg2, arg3, arg4})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+
+	if len(expected) != len(sa) {
+		t.Fatalf("expected number of sa to be %d but got: %d", len(expected), len(sa))
+	}
+	for i, v := range sa {
+		if expected[i] != v {
+			t.Fatalf("expected sa[%d] to be %s but got: %s", i, expected[i], v)
+		}
+	}
+
+	values, err := f.GetStringArray("sa")
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+
+	if len(expected) != len(values) {
+		t.Fatalf("expected number of values to be %d but got: %d", len(expected), len(values))
+	}
+	for i, v := range values {
+		if expected[i] != v {
+			t.Fatalf("expected got sa[%d] to be %s but got: %s", i, expected[i], v)
+		}
+	}
+}
+
+func TestSAWithSquareBrackets(t *testing.T) {
+	var sa []string
+	f := setUpSAFlagSet(&sa)
+
+	in := []string{"][]-[", "[a-z]", "[a-z]+"}
+	expected := []string{"][]-[", "[a-z]", "[a-z]+"}
+	argfmt := "--sa=%s"
+	arg1 := fmt.Sprintf(argfmt, in[0])
+	arg2 := fmt.Sprintf(argfmt, in[1])
+	arg3 := fmt.Sprintf(argfmt, in[2])
+	err := f.Parse([]string{arg1, arg2, arg3})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+
+	if len(expected) != len(sa) {
+		t.Fatalf("expected number of sa to be %d but got: %d", len(expected), len(sa))
+	}
+	for i, v := range sa {
+		if expected[i] != v {
+			t.Fatalf("expected sa[%d] to be %s but got: %s", i, expected[i], v)
+		}
+	}
+
+	values, err := f.GetStringArray("sa")
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+
+	if len(expected) != len(values) {
+		t.Fatalf("expected number of values to be %d but got: %d", len(expected), len(values))
+	}
+	for i, v := range values {
+		if expected[i] != v {
+			t.Fatalf("expected got sa[%d] to be %s but got: %s", i, expected[i], v)
+		}
+	}
+}