You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: if_test.go
    path of file: ./repos/arozos/src/mod/network/webdav
    
    the code of the file until where you have to start completion: // Copyright 2014 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 webdav

import (
	"reflect"
	"strings"
	"testing"
)

func TestParseIfHeader(t *testing.T) {
	// The "section x.y.z" test cases come from section x.y.z of the spec at
	// http://www.webdav.org/specs/rfc4918.html
	testCases := []struct {
		desc  string
		input string
		want  ifHeader
	}{{
		"bad: empty",
		``,
		ifHeader{},
	}, {
		"bad: no parens",
		`foobar`,
		ifHeader{},
	}, {
		"bad: empty list #1",
		`()`,
		ifHeader{},
	}, {
		"bad: empty list #2",
		`(a) (b c) () (d)`,
		ifHeader{},
	}, {
		"bad: no list after resource #1",
		`<foo>`,
		ifHeader{},
	}, {
		"bad: no list after resource #2",
		`<foo> <bar> (a)`,
		ifHeader{},
	}, {
		"bad: no list after resource #3",
		`<foo> (a) (b) <bar>`,
		ifHeader{},
	}, {
		"bad: no-tag-list followed by tagged-list",
		`(a) (b) <foo> (c)`,
		ifHeader{},
	}, {
		"bad: unfinished list",
		`(a`,
		ifHeader{},
	}, {
		"bad: unfinished ETag",
		`([b`,
		ifHeader{},
	}, {
		"bad: unfinished Notted list",
		`(Not a`,
		ifHeader{},
	}, {
		"bad: double Not",
		`(Not Not a)`,
		ifHeader{},
	}, {
		"good: one list with a Token",
		`(a)`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Token: `a`,
				}},
			}},
		},
	}, {
		"good: one list with an ETag",
		`([a])`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					ETag: `a`,
				}},
			}},
		},
	}, {
		"good: one list with three Nots",
		`(Not a Not b Not [d])`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Not:   true,
					Token: `a`,
				}, {
					Not:   true,
					Token: `b`,
				}, {
					Not:  true,
					ETag: `d`,
				}},
			}},
		},
	}, {
		"good: two lists",
		`(a) (b)`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Token: `a`,
				}},
			}, {
				conditions: []Condition{{
					Token: `b`,
				}},
			}},
		},
	}, {
		"good: two Notted lists",
		`(Not a) (Not b)`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Not:   true,
					Token: `a`,
				}},
			}, {
				conditions: []Condition{{
					Not:   true,
					Token: `b`,
				}},
			}},
		},
	}, {
		"section 7.5.1",
		`<http://www.example.com/users/f/fielding/index.html> 
			(<urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6>)`,
		ifHeader{
			lists: []ifList{{
				resourceTag: `http://www.example.com/users/f/fielding/index.html`,
				conditions: []Condition{{
					Token: `urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6`,
				}},
			}},
		},
	}, {
		"section 7.5.2 #1",
		`(<urn:uuid:150852e2-3847-42d5-8cbe-0f4f296f26cf>)`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Token: `urn:uuid:150852e2-3847-42d5-8cbe-0f4f296f26cf`,
				}},
			}},
		},
	}, {
		"section 7.5.2 #2",
		`<http://example.com/locked/>
			(<urn:uuid:150852e2-3847-42d5-8cbe-0f4f296f26cf>)`,
		ifHeader{
			lists: []ifList{{
				resourceTag: `http://example.com/locked/`,
				conditions: []Condition{{
					Token: `urn:uuid:150852e2-3847-42d5-8cbe-0f4f296f26cf`,
				}},
			}},
		},
	}, {
		"section 7.5.2 #3",
		`<http://example.com/locked/member>
			(<urn:uuid:150852e2-3847-42d5-8cbe-0f4f296f26cf>)`,
		ifHeader{
			lists: []ifList{{
				resourceTag: `http://example.com/locked/member`,
				conditions: []Condition{{
					Token: `urn:uuid:150852e2-3847-42d5-8cbe-0f4f296f26cf`,
				}},
			}},
		},
	}, {
		"section 9.9.6",
		`(<urn:uuid:fe184f2e-6eec-41d0-c765-01adc56e6bb4>) 
			(<urn:uuid:e454f3f3-acdc-452a-56c7-00a5c91e4b77>)`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Token: `urn:uuid:fe184f2e-6eec-41d0-c765-01adc56e6bb4`,
				}},
			}, {
				conditions: []Condition{{
					Token: `urn:uuid:e454f3f3-acdc-452a-56c7-00a5c91e4b77`,
				}},
			}},
		},
	}, {
		"section 9.10.8",
		`(<urn:uuid:e71d4fae-5dec-22d6-fea5-00a0c91e6be4>)`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Token: `urn:uuid:e71d4fae-5dec-22d6-fea5-00a0c91e6be4`,
				}},
			}},
		},
	}, {
		"section 10.4.6",
		`(<urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2> 
			["I am an ETag"])
			(["I am another ETag"])`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Token: `urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2`,
				}, {
					ETag: `"I am an ETag"`,
				}},
			}, {
				conditions: []Condition{{
					ETag: `"I am another ETag"`,
				}},
			}},
		},
	}, {
		"section 10.4.7",
		`(Not <urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2> 
			<urn:uuid:58f202ac-22cf-11d1-b12d-002035b29092>)`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Not:   true,
					Token: `urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2`,
				}, {
					Token: `urn:uuid:58f202ac-22cf-11d1-b12d-002035b29092`,
				}},
			}},
		},
	}, {
		"section 10.4.8",
		`(<urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2>) 
			(Not <DAV:no-lock>)`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Token: `urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2`,
				}},
			}, {
				conditions: []Condition{{
					Not:   true,
					Token: `DAV:no-lock`,
				}},
			}},
		},
	}, {
		"section 10.4.9",
		`</resource1> 
			(<urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2> 
			[W/"A weak ETag"]) (["strong ETag"])`,
		ifHeader{
			lists: []ifList{{
				resourceTag: `/resource1`,
				conditions: []Condition{{
					Token: `urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2`,
				}, {
					ETag: `W/"A weak ETag"`,
				}},
			}, {
				resourceTag: `/resource1`,
				conditions: []Condition{{
					ETag: `"strong ETag"`,
				}},
			}},
		},
	}, {
		"section 10.4.10",
		`<http://www.example.com/specs/> 
			(<urn:uuid:181d4fae-
    
func TestParseIfHeader(t *testing.T) {
	// The "section x.y.z" test cases come from section x.y.z of the spec at
	// http://www.webdav.org/specs/rfc4918.html
	testCases := []struct {
		desc  string
		input string
		want  ifHeader
	}{{
		"bad: empty",
		``,
		ifHeader{},
	}, {
		"bad: no parens",
		`foobar`,
		ifHeader{},
	}, {
		"bad: empty list #1",
		`()`,
		ifHeader{},
	}, {
		"bad: empty list #2",
		`(a) (b c) () (d)`,
		ifHeader{},
	}, {
		"bad: no list after resource #1",
		`<foo>`,
		ifHeader{},
	}, {
		"bad: no list after resource #2",
		`<foo> <bar> (a)`,
		ifHeader{},
	}, {
		"bad: no list after resource #3",
		`<foo> (a) (b) <bar>`,
		ifHeader{},
	}, {
		"bad: no-tag-list followed by tagged-list",
		`(a) (b) <foo> (c)`,
		ifHeader{},
	}, {
		"bad: unfinished list",
		`(a`,
		ifHeader{},
	}, {
		"bad: unfinished ETag",
		`([b`,
		ifHeader{},
	}, {
		"bad: unfinished Notted list",
		`(Not a`,
		ifHeader{},
	}, {
		"bad: double Not",
		`(Not Not a)`,
		ifHeader{},
	}, {
		"good: one list with a Token",
		`(a)`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Token: `a`,
				}},
			}},
		},
	}, {
		"good: one list with an ETag",
		`([a])`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					ETag: `a`,
				}},
			}},
		},
	}, {
		"good: one list with three Nots",
		`(Not a Not b Not [d])`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Not:   true,
					Token: `a`,
				}, {
					Not:   true,
					Token: `b`,
				}, {
					Not:  true,
					ETag: `d`,
				}},
			}},
		},
	}, {
		"good: two lists",
		`(a) (b)`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Token: `a`,
				}},
			}, {
				conditions: []Condition{{
					Token: `b`,
				}},
			}},
		},
	}, {
		"good: two Notted lists",
		`(Not a) (Not b)`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Not:   true,
					Token: `a`,
				}},
			}, {
				conditions: []Condition{{
					Not:   true,
					Token: `b`,
				}},
			}},
		},
	}, {
		"section 7.5.1",
		`<http://www.example.com/users/f/fielding/index.html> 
			(<urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6>)`,
		ifHeader{
			lists: []ifList{{
				resourceTag: `http://www.example.com/users/f/fielding/index.html`,
				conditions: []Condition{{
					Token: `urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6`,
				}},
			}},
		},
	}, {
		"section 7.5.2 #1",
		`(<urn:uuid:150852e2-3847-42d5-8cbe-0f4f296f26cf>)`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Token: `urn:uuid:150852e2-3847-42d5-8cbe-0f4f296f26cf`,
				}},
			}},
		},
	}, {
		"section 7.5.2 #2",
		`<http://example.com/locked/>
			(<urn:uuid:150852e2-3847-42d5-8cbe-0f4f296f26cf>)`,
		ifHeader{
			lists: []ifList{{
				resourceTag: `http://example.com/locked/`,
				conditions: []Condition{{
					Token: `urn:uuid:150852e2-3847-42d5-8cbe-0f4f296f26cf`,
				}},
			}},
		},
	}, {
		"section 7.5.2 #3",
		`<http://example.com/locked/member>
			(<urn:uuid:150852e2-3847-42d5-8cbe-0f4f296f26cf>)`,
		ifHeader{
			lists: []ifList{{
				resourceTag: `http://example.com/locked/member`,
				conditions: []Condition{{
					Token: `urn:uuid:150852e2-3847-42d5-8cbe-0f4f296f26cf`,
				}},
			}},
		},
	}, {
		"section 9.9.6",
		`(<urn:uuid:fe184f2e-6eec-41d0-c765-01adc56e6bb4>) 
			(<urn:uuid:e454f3f3-acdc-452a-56c7-00a5c91e4b77>)`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Token: `urn:uuid:fe184f2e-6eec-41d0-c765-01adc56e6bb4`,
				}},
			}, {
				conditions: []Condition{{
					Token: `urn:uuid:e454f3f3-acdc-452a-56c7-00a5c91e4b77`,
				}},
			}},
		},
	}, {
		"section 9.10.8",
		`(<urn:uuid:e71d4fae-5dec-22d6-fea5-00a0c91e6be4>)`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Token: `urn:uuid:e71d4fae-5dec-22d6-fea5-00a0c91e6be4`,
				}},
			}},
		},
	}, {
		"section 10.4.6",
		`(<urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2> 
			["I am an ETag"])
			(["I am another ETag"])`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Token: `urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2`,
				}, {
					ETag: `"I am an ETag"`,
				}},
			}, {
				conditions: []Condition{{
					ETag: `"I am another ETag"`,
				}},
			}},
		},
	}, {
		"section 10.4.7",
		`(Not <urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2> 
			<urn:uuid:58f202ac-22cf-11d1-b12d-002035b29092>)`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Not:   true,
					Token: `urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2`,
				}, {
					Token: `urn:uuid:58f202ac-22cf-11d1-b12d-002035b29092`,
				}},
			}},
		},
	}, {
		"section 10.4.8",
		`(<urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2>) 
			(Not <DAV:no-lock>)`,
		ifHeader{
			lists: []ifList{{
				conditions: []Condition{{
					Token: `urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2`,
				}},
			}, {
				conditions: []Condition{{
					Not:   true,
					Token: `DAV:no-lock`,
				}},
			}},
		},
	}, {
		"section 10.4.9",
		`</resource1> 
			(<urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2> 
			[W/"A weak ETag"]) (["strong ETag"])`,
		ifHeader{
			lists: []ifList{{
				resourceTag: `/resource1`,
				conditions: []Condition{{
					Token: `urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2`,
				}, {
					ETag: `W/"A weak ETag"`,
				}},
			}, {
				resourceTag: `/resource1`,
				conditions: []Condition{{
					ETag: `"strong ETag"`,
				}},
			}},
		},
	}, {
		"section 10.4.10",
		`<http://www.example.com/specs/> 
			(<urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2>)`,
		ifHeader{
			lists: []ifList{{
				resourceTag: `http://www.example.com/specs/`,
				conditions: []Condition{{
					Token: `urn:uuid:181d4fae-7d8c-11d0-a765-00a0c91e6bf2`,
				}},
			}},
		},
	}, {
		"section 10.4.11 #1",
		`</specs/rfc2518.doc> (["4217"])`,
		ifHeader{
			lists: []ifList{{
				resourceTag: `/specs/rfc2518.doc`,
				conditions: []Condition{{
					ETag: `"4217"`,
				}},
			}},
		},
	}, {
		"section 10.4.11 #2",
		`</specs/rfc2518.doc> (Not ["4217"])`,
		ifHeader{
			lists: []ifList{{
				resourceTag: `/specs/rfc2518.doc`,
				conditions: []Condition{{
					Not:  true,
					ETag: `"4217"`,
				}},
			}},
		},
	}}

	for _, tc := range testCases {
		got, ok := parseIfHeader(strings.Replace(tc.input, "\n", "", -1))
		if gotEmpty := reflect.DeepEqual(got, ifHeader{}); gotEmpty == ok {
			t.Errorf("%s: should be different: empty header == %t, ok == %t", tc.desc, gotEmpty, ok)
			continue
		}
		if !reflect.DeepEqual(got, tc.want) {
			t.Errorf("%s:\ngot  %v\nwant %v", tc.desc, got, tc.want)
			continue
		}
	}
}