Add map valued (string->string, string->int) flags. (#133)

Format: --myflag=a=1,b=2

1 files changed, 158 insertions, 0 deletions

diff --git a/string_to_string_test.go b/string_to_string_test.go
new file mode 100644
index 0000000..f1aae04
--- /dev/null
+++ b/string_to_string_test.go
@@ -0,0 +1,158 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of ths2s source code s2s governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package pflag
+
+import (
+	"bytes"
+	"encoding/csv"
+	"fmt"
+	"strings"
+	"testing"
+)
+
+func setUpS2SFlagSet(s2sp *map[string]string) *FlagSet {
+	f := NewFlagSet("test", ContinueOnError)
+	f.StringToStringVar(s2sp, "s2s", map[string]string{}, "Command separated ls2st!")
+	return f
+}
+
+func setUpS2SFlagSetWithDefault(s2sp *map[string]string) *FlagSet {
+	f := NewFlagSet("test", ContinueOnError)
+	f.StringToStringVar(s2sp, "s2s", map[string]string{"da": "1", "db": "2", "de": "5,6"}, "Command separated ls2st!")
+	return f
+}
+
+func createS2SFlag(vals map[string]string) string {
+	records := make([]string, 0, len(vals)>>1)
+	for k, v := range vals {
+		records = append(records, k+"="+v)
+	}
+
+	var buf bytes.Buffer
+	w := csv.NewWriter(&buf)
+	if err := w.Write(records); err != nil {
+		panic(err)
+	}
+	w.Flush()
+	return strings.TrimSpace(buf.String())
+}
+
+func TestEmptyS2S(t *testing.T) {
+	var s2s map[string]string
+	f := setUpS2SFlagSet(&s2s)
+	err := f.Parse([]string{})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+
+	getS2S, err := f.GetStringToString("s2s")
+	if err != nil {
+		t.Fatal("got an error from GetStringToString():", err)
+	}
+	if len(getS2S) != 0 {
+		t.Fatalf("got s2s %v with len=%d but expected length=0", getS2S, len(getS2S))
+	}
+}
+
+func TestS2S(t *testing.T) {
+	var s2s map[string]string
+	f := setUpS2SFlagSet(&s2s)
+
+	vals := map[string]string{"a": "1", "b": "2", "d": "4", "c": "3", "e": "5,6"}
+	arg := fmt.Sprintf("--s2s=%s", createS2SFlag(vals))
+	err := f.Parse([]string{arg})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for k, v := range s2s {
+		if vals[k] != v {
+			t.Fatalf("expected s2s[%s] to be %s but got: %s", k, vals[k], v)
+		}
+	}
+	getS2S, err := f.GetStringToString("s2s")
+	if err != nil {
+		t.Fatalf("got error: %v", err)
+	}
+	for k, v := range getS2S {
+		if vals[k] != v {
+			t.Fatalf("expected s2s[%s] to be %s but got: %s from GetStringToString", k, vals[k], v)
+		}
+	}
+}
+
+func TestS2SDefault(t *testing.T) {
+	var s2s map[string]string
+	f := setUpS2SFlagSetWithDefault(&s2s)
+
+	vals := map[string]string{"da": "1", "db": "2", "de": "5,6"}
+
+	err := f.Parse([]string{})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for k, v := range s2s {
+		if vals[k] != v {
+			t.Fatalf("expected s2s[%s] to be %s but got: %s", k, vals[k], v)
+		}
+	}
+
+	getS2S, err := f.GetStringToString("s2s")
+	if err != nil {
+		t.Fatal("got an error from GetStringToString():", err)
+	}
+	for k, v := range getS2S {
+		if vals[k] != v {
+			t.Fatalf("expected s2s[%s] to be %s from GetStringToString but got: %s", k, vals[k], v)
+		}
+	}
+}
+
+func TestS2SWithDefault(t *testing.T) {
+	var s2s map[string]string
+	f := setUpS2SFlagSetWithDefault(&s2s)
+
+	vals := map[string]string{"a": "1", "b": "2", "e": "5,6"}
+	arg := fmt.Sprintf("--s2s=%s", createS2SFlag(vals))
+	err := f.Parse([]string{arg})
+	if err != nil {
+		t.Fatal("expected no error; got", err)
+	}
+	for k, v := range s2s {
+		if vals[k] != v {
+			t.Fatalf("expected s2s[%s] to be %s but got: %s", k, vals[k], v)
+		}
+	}
+
+	getS2S, err := f.GetStringToString("s2s")
+	if err != nil {
+		t.Fatal("got an error from GetStringToString():", err)
+	}
+	for k, v := range getS2S {
+		if vals[k] != v {
+			t.Fatalf("expected s2s[%s] to be %s from GetStringToString but got: %s", k, vals[k], v)
+		}
+	}
+}
+
+func TestS2SCalledTwice(t *testing.T) {
+	var s2s map[string]string
+	f := setUpS2SFlagSet(&s2s)
+
+	in := []string{"a=1,b=2", "b=3", `"e=5,6"`, `f="7,8"`}
+	expected := map[string]string{"a": "1", "b": "3", "e": "5,6", "f": "7,8"}
+	argfmt := "--s2s=%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)
+	}
+	for i, v := range s2s {
+		if expected[i] != v {
+			t.Fatalf("expected s2s[%s] to be %s but got: %s", i, expected[i], v)
+		}
+	}
+}