add go-querystring

8 files changed, 786 insertions, 0 deletions

diff --git a/vendor/github.com/google/go-querystring/.gitignore b/vendor/github.com/google/go-querystring/.gitignore
new file mode 100644
index 0000000..9ed3b07
--- /dev/null
+++ b/vendor/github.com/google/go-querystring/.gitignore
@@ -0,0 +1 @@
+*.test
diff --git a/vendor/github.com/google/go-querystring/.travis.yml b/vendor/github.com/google/go-querystring/.travis.yml
new file mode 100644
index 0000000..881d087
--- /dev/null
+++ b/vendor/github.com/google/go-querystring/.travis.yml
@@ -0,0 +1,5 @@
+language: go
+
+go:
+  - 1.x
+  - 1.11.x
diff --git a/vendor/github.com/google/go-querystring/CONTRIBUTING.md b/vendor/github.com/google/go-querystring/CONTRIBUTING.md
new file mode 100644
index 0000000..51cf5cd
--- /dev/null
+++ b/vendor/github.com/google/go-querystring/CONTRIBUTING.md
@@ -0,0 +1,67 @@
+# How to contribute #
+
+We'd love to accept your patches and contributions to this project.  There are
+a just a few small guidelines you need to follow.
+
+
+## Contributor License Agreement ##
+
+Contributions to any Google project must be accompanied by a Contributor
+License Agreement.  This is not a copyright **assignment**, it simply gives
+Google permission to use and redistribute your contributions as part of the
+project.
+
+  * If you are an individual writing original source code and you're sure you
+    own the intellectual property, then you'll need to sign an [individual
+    CLA][].
+
+  * If you work for a company that wants to allow you to contribute your work,
+    then you'll need to sign a [corporate CLA][].
+
+You generally only need to submit a CLA once, so if you've already submitted
+one (even if it was for a different project), you probably don't need to do it
+again.
+
+[individual CLA]: https://developers.google.com/open-source/cla/individual
+[corporate CLA]: https://developers.google.com/open-source/cla/corporate
+
+
+## Submitting a patch ##
+
+  1. It's generally best to start by opening a new issue describing the bug or
+     feature you're intending to fix.  Even if you think it's relatively minor,
+     it's helpful to know what people are working on.  Mention in the initial
+     issue that you are planning to work on that bug or feature so that it can
+     be assigned to you.
+
+  1. Follow the normal process of [forking][] the project, and setup a new
+     branch to work in.  It's important that each group of changes be done in
+     separate branches in order to ensure that a pull request only includes the
+     commits related to that bug or feature.
+
+  1. Go makes it very simple to ensure properly formatted code, so always run
+     `go fmt` on your code before committing it.  You should also run
+     [golint][] over your code.  As noted in the [golint readme][], it's not
+     strictly necessary that your code be completely "lint-free", but this will
+     help you find common style issues.
+
+  1. Any significant changes should almost always be accompanied by tests.  The
+     project already has good test coverage, so look at some of the existing
+     tests if you're unsure how to go about it.  [gocov][] and [gocov-html][]
+     are invaluable tools for seeing which parts of your code aren't being
+     exercised by your tests.
+
+  1. Do your best to have [well-formed commit messages][] for each change.
+     This provides consistency throughout the project, and ensures that commit
+     messages are able to be formatted properly by various git tools.
+
+  1. Finally, push the commits to your fork and submit a [pull request][].
+
+[forking]: https://help.github.com/articles/fork-a-repo
+[golint]: https://github.com/golang/lint
+[golint readme]: https://github.com/golang/lint/blob/master/README
+[gocov]: https://github.com/axw/gocov
+[gocov-html]: https://github.com/matm/gocov-html
+[well-formed commit messages]: http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html
+[squash]: http://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits
+[pull request]: https://help.github.com/articles/creating-a-pull-request
diff --git a/vendor/github.com/google/go-querystring/LICENSE b/vendor/github.com/google/go-querystring/LICENSE
new file mode 100644
index 0000000..ae121a1
--- /dev/null
+++ b/vendor/github.com/google/go-querystring/LICENSE
@@ -0,0 +1,27 @@
+Copyright (c) 2013 Google. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/github.com/google/go-querystring/README.md b/vendor/github.com/google/go-querystring/README.md
new file mode 100644
index 0000000..0e600be
--- /dev/null
+++ b/vendor/github.com/google/go-querystring/README.md
@@ -0,0 +1,37 @@
+# go-querystring #
+
+[![GoDoc](https://godoc.org/github.com/google/go-querystring/query?status.svg)](https://godoc.org/github.com/google/go-querystring/query) [![Build Status](https://travis-ci.org/google/go-querystring.svg?branch=master)](https://travis-ci.org/google/go-querystring)
+
+go-querystring is Go library for encoding structs into URL query parameters.
+
+## Usage ##
+
+```go
+import "github.com/google/go-querystring/query"
+```
+
+go-querystring is designed to assist in scenarios where you want to construct a
+URL using a struct that represents the URL query parameters.  You might do this
+to enforce the type safety of your parameters, for example, as is done in the
+[go-github][] library.
+
+The query package exports a single `Values()` function.  A simple example:
+
+```go
+type Options struct {
+  Query   string `url:"q"`
+  ShowAll bool   `url:"all"`
+  Page    int    `url:"page"`
+}
+
+opt := Options{ "foo", true, 2 }
+v, _ := query.Values(opt)
+fmt.Print(v.Encode()) // will output: "q=foo&all=true&page=2"
+```
+
+[go-github]: https://github.com/google/go-github/commit/994f6f8405f052a117d2d0b500054341048fbb08
+
+## License ##
+
+This library is distributed under the BSD-style license found in the [LICENSE](./LICENSE)
+file.
diff --git a/vendor/github.com/google/go-querystring/go.mod b/vendor/github.com/google/go-querystring/go.mod
new file mode 100644
index 0000000..45dca2d
--- /dev/null
+++ b/vendor/github.com/google/go-querystring/go.mod
@@ -0,0 +1 @@
+module github.com/google/go-querystring
diff --git a/vendor/github.com/google/go-querystring/query/encode.go b/vendor/github.com/google/go-querystring/query/encode.go
new file mode 100644
index 0000000..37080b1
--- /dev/null
+++ b/vendor/github.com/google/go-querystring/query/encode.go
@@ -0,0 +1,320 @@
+// Copyright 2013 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 query implements encoding of structs into URL query parameters.
+//
+// As a simple example:
+//
+//      type Options struct {
+//              Query   string `url:"q"`
+//              ShowAll bool   `url:"all"`
+//              Page    int    `url:"page"`
+//      }
+//
+//      opt := Options{ "foo", true, 2 }
+//      v, _ := query.Values(opt)
+//      fmt.Print(v.Encode()) // will output: "q=foo&all=true&page=2"
+//
+// The exact mapping between Go values and url.Values is described in the
+// documentation for the Values() function.
+package query
+
+import (
+        "bytes"
+        "fmt"
+        "net/url"
+        "reflect"
+        "strconv"
+        "strings"
+        "time"
+)
+
+var timeType = reflect.TypeOf(time.Time{})
+
+var encoderType = reflect.TypeOf(new(Encoder)).Elem()
+
+// Encoder is an interface implemented by any type that wishes to encode
+// itself into URL values in a non-standard way.
+type Encoder interface {
+        EncodeValues(key string, v *url.Values) error
+}
+
+// Values returns the url.Values encoding of v.
+//
+// Values expects to be passed a struct, and traverses it recursively using the
+// following encoding rules.
+//
+// Each exported struct field is encoded as a URL parameter unless
+//
+//      - the field's tag is "-", or
+//      - the field is empty and its tag specifies the "omitempty" option
+//
+// The empty values are false, 0, any nil pointer or interface value, any array
+// slice, map, or string of length zero, and any time.Time that returns true
+// for IsZero().
+//
+// The URL parameter name defaults to the struct field name but can be
+// specified in the struct field's tag value.  The "url" key in the struct
+// field's tag value is the key name, followed by an optional comma and
+// options.  For example:
+//
+//      // Field is ignored by this package.
+//      Field int `url:"-"`
+//
+//      // Field appears as URL parameter "myName".
+//      Field int `url:"myName"`
+//
+//      // Field appears as URL parameter "myName" and the field is omitted if
+//      // its value is empty
+//      Field int `url:"myName,omitempty"`
+//
+//      // Field appears as URL parameter "Field" (the default), but the field
+//      // is skipped if empty.  Note the leading comma.
+//      Field int `url:",omitempty"`
+//
+// For encoding individual field values, the following type-dependent rules
+// apply:
+//
+// Boolean values default to encoding as the strings "true" or "false".
+// Including the "int" option signals that the field should be encoded as the
+// strings "1" or "0".
+//
+// time.Time values default to encoding as RFC3339 timestamps.  Including the
+// "unix" option signals that the field should be encoded as a Unix time (see
+// time.Unix())
+//
+// Slice and Array values default to encoding as multiple URL values of the
+// same name.  Including the "comma" option signals that the field should be
+// encoded as a single comma-delimited value.  Including the "space" option
+// similarly encodes the value as a single space-delimited string. Including
+// the "semicolon" option will encode the value as a semicolon-delimited string.
+// Including the "brackets" option signals that the multiple URL values should
+// have "[]" appended to the value name. "numbered" will append a number to
+// the end of each incidence of the value name, example:
+// name0=value0&name1=value1, etc.
+//
+// Anonymous struct fields are usually encoded as if their inner exported
+// fields were fields in the outer struct, subject to the standard Go
+// visibility rules.  An anonymous struct field with a name given in its URL
+// tag is treated as having that name, rather than being anonymous.
+//
+// Non-nil pointer values are encoded as the value pointed to.
+//
+// Nested structs are encoded including parent fields in value names for
+// scoping. e.g:
+//
+//      "user[name]=acme&user[addr][postcode]=1234&user[addr][city]=SFO"
+//
+// All other values are encoded using their default string representation.
+//
+// Multiple fields that encode to the same URL parameter name will be included
+// as multiple URL values of the same name.
+func Values(v interface{}) (url.Values, error) {
+        values := make(url.Values)
+        val := reflect.ValueOf(v)
+        for val.Kind() == reflect.Ptr {
+                if val.IsNil() {
+                        return values, nil
+                }
+                val = val.Elem()
+        }
+
+        if v == nil {
+                return values, nil
+        }
+
+        if val.Kind() != reflect.Struct {
+                return nil, fmt.Errorf("query: Values() expects struct input. Got %v", val.Kind())
+        }
+
+        err := reflectValue(values, val, "")
+        return values, err
+}
+
+// reflectValue populates the values parameter from the struct fields in val.
+// Embedded structs are followed recursively (using the rules defined in the
+// Values function documentation) breadth-first.
+func reflectValue(values url.Values, val reflect.Value, scope string) error {
+        var embedded []reflect.Value
+
+        typ := val.Type()
+        for i := 0; i < typ.NumField(); i++ {
+                sf := typ.Field(i)
+                if sf.PkgPath != "" && !sf.Anonymous { // unexported
+                        continue
+                }
+
+                sv := val.Field(i)
+                tag := sf.Tag.Get("url")
+                if tag == "-" {
+                        continue
+                }
+                name, opts := parseTag(tag)
+                if name == "" {
+                        if sf.Anonymous && sv.Kind() == reflect.Struct {
+                                // save embedded struct for later processing
+                                embedded = append(embedded, sv)
+                                continue
+                        }
+
+                        name = sf.Name
+                }
+
+                if scope != "" {
+                        name = scope + "[" + name + "]"
+                }
+
+                if opts.Contains("omitempty") && isEmptyValue(sv) {
+                        continue
+                }
+
+                if sv.Type().Implements(encoderType) {
+                        if !reflect.Indirect(sv).IsValid() {
+                                sv = reflect.New(sv.Type().Elem())
+                        }
+
+                        m := sv.Interface().(Encoder)
+                        if err := m.EncodeValues(name, &values); err != nil {
+                                return err
+                        }
+                        continue
+                }
+
+                if sv.Kind() == reflect.Slice || sv.Kind() == reflect.Array {
+                        var del byte
+                        if opts.Contains("comma") {
+                                del = ','
+                        } else if opts.Contains("space") {
+                                del = ' '
+                        } else if opts.Contains("semicolon") {
+                                del = ';'
+                        } else if opts.Contains("brackets") {
+                                name = name + "[]"
+                        }
+
+                        if del != 0 {
+                                s := new(bytes.Buffer)
+                                first := true
+                                for i := 0; i < sv.Len(); i++ {
+                                        if first {
+                                                first = false
+                                        } else {
+                                                s.WriteByte(del)
+                                        }
+                                        s.WriteString(valueString(sv.Index(i), opts))
+                                }
+                                values.Add(name, s.String())
+                        } else {
+                                for i := 0; i < sv.Len(); i++ {
+                                        k := name
+                                        if opts.Contains("numbered") {
+                                                k = fmt.Sprintf("%s%d", name, i)
+                                        }
+                                        values.Add(k, valueString(sv.Index(i), opts))
+                                }
+                        }
+                        continue
+                }
+
+                for sv.Kind() == reflect.Ptr {
+                        if sv.IsNil() {
+                                break
+                        }
+                        sv = sv.Elem()
+                }
+
+                if sv.Type() == timeType {
+                        values.Add(name, valueString(sv, opts))
+                        continue
+                }
+
+                if sv.Kind() == reflect.Struct {
+                        reflectValue(values, sv, name)
+                        continue
+                }
+
+                values.Add(name, valueString(sv, opts))
+        }
+
+        for _, f := range embedded {
+                if err := reflectValue(values, f, scope); err != nil {
+                        return err
+                }
+        }
+
+        return nil
+}
+
+// valueString returns the string representation of a value.
+func valueString(v reflect.Value, opts tagOptions) string {
+        for v.Kind() == reflect.Ptr {
+                if v.IsNil() {
+                        return ""
+                }
+                v = v.Elem()
+        }
+
+        if v.Kind() == reflect.Bool && opts.Contains("int") {
+                if v.Bool() {
+                        return "1"
+                }
+                return "0"
+        }
+
+        if v.Type() == timeType {
+                t := v.Interface().(time.Time)
+                if opts.Contains("unix") {
+                        return strconv.FormatInt(t.Unix(), 10)
+                }
+                return t.Format(time.RFC3339)
+        }
+
+        return fmt.Sprint(v.Interface())
+}
+
+// isEmptyValue checks if a value should be considered empty for the purposes
+// of omitting fields with the "omitempty" option.
+func isEmptyValue(v reflect.Value) bool {
+        switch v.Kind() {
+        case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
+                return v.Len() == 0
+        case reflect.Bool:
+                return !v.Bool()
+        case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+                return v.Int() == 0
+        case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+                return v.Uint() == 0
+        case reflect.Float32, reflect.Float64:
+                return v.Float() == 0
+        case reflect.Interface, reflect.Ptr:
+                return v.IsNil()
+        }
+
+        if v.Type() == timeType {
+                return v.Interface().(time.Time).IsZero()
+        }
+
+        return false
+}
+
+// tagOptions is the string following a comma in a struct field's "url" tag, or
+// the empty string. It does not include the leading comma.
+type tagOptions []string
+
+// parseTag splits a struct field's url tag into its name and comma-separated
+// options.
+func parseTag(tag string) (string, tagOptions) {
+        s := strings.Split(tag, ",")
+        return s[0], s[1:]
+}
+
+// Contains checks whether the tagOptions contains the specified option.
+func (o tagOptions) Contains(option string) bool {
+        for _, s := range o {
+                if s == option {
+                        return true
+                }
+        }
+        return false
+}
diff --git a/vendor/github.com/google/go-querystring/query/encode_test.go b/vendor/github.com/google/go-querystring/query/encode_test.go
new file mode 100644
index 0000000..77bea5a
--- /dev/null
+++ b/vendor/github.com/google/go-querystring/query/encode_test.go
@@ -0,0 +1,328 @@
+// Copyright 2013 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 query
+
+import (
+        "fmt"
+        "net/url"
+        "reflect"
+        "testing"
+        "time"
+)
+
+type Nested struct {
+        A   SubNested  `url:"a"`
+        B   *SubNested `url:"b"`
+        Ptr *SubNested `url:"ptr,omitempty"`
+}
+
+type SubNested struct {
+        Value string `url:"value"`
+}
+
+func TestValues_types(t *testing.T) {
+        str := "string"
+        strPtr := &str
+        timeVal := time.Date(2000, 1, 1, 12, 34, 56, 0, time.UTC)
+
+        tests := []struct {
+                in   interface{}
+                want url.Values
+        }{
+                {
+                        // basic primitives
+                        struct {
+                                A string
+                                B int
+                                C uint
+                                D float32
+                                E bool
+                        }{},
+                        url.Values{
+                                "A": {""},
+                                "B": {"0"},
+                                "C": {"0"},
+                                "D": {"0"},
+                                "E": {"false"},
+                        },
+                },
+                {
+                        // pointers
+                        struct {
+                                A *string
+                                B *int
+                                C **string
+                                D *time.Time
+                        }{
+                                A: strPtr,
+                                C: &strPtr,
+                                D: &timeVal,
+                        },
+                        url.Values{
+                                "A": {str},
+                                "B": {""},
+                                "C": {str},
+                                "D": {"2000-01-01T12:34:56Z"},
+                        },
+                },
+                {
+                        // slices and arrays
+                        struct {
+                                A []string
+                                B []string `url:",comma"`
+                                C []string `url:",space"`
+                                D [2]string
+                                E [2]string `url:",comma"`
+                                F [2]string `url:",space"`
+                                G []*string `url:",space"`
+                                H []bool    `url:",int,space"`
+                                I []string  `url:",brackets"`
+                                J []string  `url:",semicolon"`
+                                K []string  `url:",numbered"`
+                        }{
+                                A: []string{"a", "b"},
+                                B: []string{"a", "b"},
+                                C: []string{"a", "b"},
+                                D: [2]string{"a", "b"},
+                                E: [2]string{"a", "b"},
+                                F: [2]string{"a", "b"},
+                                G: []*string{&str, &str},
+                                H: []bool{true, false},
+                                I: []string{"a", "b"},
+                                J: []string{"a", "b"},
+                                K: []string{"a", "b"},
+                        },
+                        url.Values{
+                                "A":   {"a", "b"},
+                                "B":   {"a,b"},
+                                "C":   {"a b"},
+                                "D":   {"a", "b"},
+                                "E":   {"a,b"},
+                                "F":   {"a b"},
+                                "G":   {"string string"},
+                                "H":   {"1 0"},
+                                "I[]": {"a", "b"},
+                                "J":   {"a;b"},
+                                "K0":  {"a"},
+                                "K1":  {"b"},
+                        },
+                },
+                {
+                        // other types
+                        struct {
+                                A time.Time
+                                B time.Time `url:",unix"`
+                                C bool      `url:",int"`
+                                D bool      `url:",int"`
+                        }{
+                                A: time.Date(2000, 1, 1, 12, 34, 56, 0, time.UTC),
+                                B: time.Date(2000, 1, 1, 12, 34, 56, 0, time.UTC),
+                                C: true,
+                                D: false,
+                        },
+                        url.Values{
+                                "A": {"2000-01-01T12:34:56Z"},
+                                "B": {"946730096"},
+                                "C": {"1"},
+                                "D": {"0"},
+                        },
+                },
+                {
+                        struct {
+                                Nest Nested `url:"nest"`
+                        }{
+                                Nested{
+                                        A: SubNested{
+                                                Value: "that",
+                                        },
+                                },
+                        },
+                        url.Values{
+                                "nest[a][value]": {"that"},
+                                "nest[b]":        {""},
+                        },
+                },
+                {
+                        struct {
+                                Nest Nested `url:"nest"`
+                        }{
+                                Nested{
+                                        Ptr: &SubNested{
+                                                Value: "that",
+                                        },
+                                },
+                        },
+                        url.Values{
+                                "nest[a][value]":   {""},
+                                "nest[b]":          {""},
+                                "nest[ptr][value]": {"that"},
+                        },
+                },
+                {
+                        nil,
+                        url.Values{},
+                },
+        }
+
+        for i, tt := range tests {
+                v, err := Values(tt.in)
+                if err != nil {
+                        t.Errorf("%d. Values(%q) returned error: %v", i, tt.in, err)
+                }
+
+                if !reflect.DeepEqual(tt.want, v) {
+                        t.Errorf("%d. Values(%q) returned %v, want %v", i, tt.in, v, tt.want)
+                }
+        }
+}
+
+func TestValues_omitEmpty(t *testing.T) {
+        str := ""
+        s := struct {
+                a string
+                A string
+                B string  `url:",omitempty"`
+                C string  `url:"-"`
+                D string  `url:"omitempty"` // actually named omitempty, not an option
+                E *string `url:",omitempty"`
+        }{E: &str}
+
+        v, err := Values(s)
+        if err != nil {
+                t.Errorf("Values(%v) returned error: %v", s, err)
+        }
+
+        want := url.Values{
+                "A":         {""},
+                "omitempty": {""},
+                "E":         {""}, // E is included because the pointer is not empty, even though the string being pointed to is
+        }
+        if !reflect.DeepEqual(want, v) {
+                t.Errorf("Values(%v) returned %v, want %v", s, v, want)
+        }
+}
+
+type A struct {
+        B
+}
+
+type B struct {
+        C string
+}
+
+type D struct {
+        B
+        C string
+}
+
+type e struct {
+        B
+        C string
+}
+
+type F struct {
+        e
+}
+
+func TestValues_embeddedStructs(t *testing.T) {
+        tests := []struct {
+                in   interface{}
+                want url.Values
+        }{
+                {
+                        A{B{C: "foo"}},
+                        url.Values{"C": {"foo"}},
+                },
+                {
+                        D{B: B{C: "bar"}, C: "foo"},
+                        url.Values{"C": {"foo", "bar"}},
+                },
+                {
+                        F{e{B: B{C: "bar"}, C: "foo"}}, // With unexported embed
+                        url.Values{"C": {"foo", "bar"}},
+                },
+        }
+
+        for i, tt := range tests {
+                v, err := Values(tt.in)
+                if err != nil {
+                        t.Errorf("%d. Values(%q) returned error: %v", i, tt.in, err)
+                }
+
+                if !reflect.DeepEqual(tt.want, v) {
+                        t.Errorf("%d. Values(%q) returned %v, want %v", i, tt.in, v, tt.want)
+                }
+        }
+}
+
+func TestValues_invalidInput(t *testing.T) {
+        _, err := Values("")
+        if err == nil {
+                t.Errorf("expected Values() to return an error on invalid input")
+        }
+}
+
+type EncodedArgs []string
+
+func (m EncodedArgs) EncodeValues(key string, v *url.Values) error {
+        for i, arg := range m {
+                v.Set(fmt.Sprintf("%s.%d", key, i), arg)
+        }
+        return nil
+}
+
+func TestValues_Marshaler(t *testing.T) {
+        s := struct {
+                Args EncodedArgs `url:"arg"`
+        }{[]string{"a", "b", "c"}}
+        v, err := Values(s)
+        if err != nil {
+                t.Errorf("Values(%q) returned error: %v", s, err)
+        }
+
+        want := url.Values{
+                "arg.0": {"a"},
+                "arg.1": {"b"},
+                "arg.2": {"c"},
+        }
+        if !reflect.DeepEqual(want, v) {
+                t.Errorf("Values(%q) returned %v, want %v", s, v, want)
+        }
+}
+
+func TestValues_MarshalerWithNilPointer(t *testing.T) {
+        s := struct {
+                Args *EncodedArgs `url:"arg"`
+        }{}
+        v, err := Values(s)
+        if err != nil {
+                t.Errorf("Values(%v) returned error: %v", s, err)
+        }
+
+        want := url.Values{}
+        if !reflect.DeepEqual(want, v) {
+                t.Errorf("Values(%v) returned %v, want %v", s, v, want)
+        }
+}
+
+func TestTagParsing(t *testing.T) {
+        name, opts := parseTag("field,foobar,foo")
+        if name != "field" {
+                t.Fatalf("name = %q, want field", name)
+        }
+        for _, tt := range []struct {
+                opt  string
+                want bool
+        }{
+                {"foobar", true},
+                {"foo", true},
+                {"bar", false},
+                {"field", false},
+        } {
+                if opts.Contains(tt.opt) != tt.want {
+                        t.Errorf("Contains(%q) = %v", tt.opt, !tt.want)
+                }
+        }
+}