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// Copyright 2011 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 http

import (

        "testing"

)

var ParseRangeTests = []struct {

        s      string

        length int64

        r      []httpRange

}{

        {"", 0, nil},

        {"foo", 0, nil},

        {"bytes=", 0, nil},

        {"bytes=5-4", 10, nil},

        {"bytes=0-2,5-4", 10, nil},

        {"bytes=0-9", 10, []httpRange{{0, 10}}},

        {"bytes=0-", 10, []httpRange{{0, 10}}},

        {"bytes=5-", 10, []httpRange{{5, 5}}},

        {"bytes=0-20", 10, []httpRange{{0, 10}}},

        {"bytes=15-,0-5", 10, nil},

        {"bytes=-5", 10, []httpRange{{5, 5}}},

        {"bytes=-15", 10, []httpRange{{0, 10}}},

        {"bytes=0-499", 10000, []httpRange{{0, 500}}},

        {"bytes=500-999", 10000, []httpRange{{500, 500}}},

        {"bytes=-500", 10000, []httpRange{{9500, 500}}},

        {"bytes=9500-", 10000, []httpRange{{9500, 500}}},

        {"bytes=0-0,-1", 10000, []httpRange{{0, 1}, {9999, 1}}},

        {"bytes=500-600,601-999", 10000, []httpRange{{500, 101}, {601, 399}}},

        {"bytes=500-700,601-999", 10000, []httpRange{{500, 201}, {601, 399}}},

}

func TestParseRange(t *testing.T) {

        for _, test := range ParseRangeTests {

                r := test.r

                ranges, err := parseRange(test.s, test.length)

                if err != nil && r != nil {

                        t.Errorf("parseRange(%q) returned error %q", test.s, err)

                }

                if len(ranges) != len(r) {

                        t.Errorf("len(parseRange(%q)) = %d, want %d", test.s, len(ranges), len(r))

                        continue

                }

                for i := range r {

                        if ranges[i].start != r[i].start {

                                t.Errorf("parseRange(%q)[%d].start = %d, want %d", test.s, i, ranges[i].start, r[i].start)

                        }

                        if ranges[i].length != r[i].length {

                                t.Errorf("parseRange(%q)[%d].length = %d, want %d", test.s, i, ranges[i].length, r[i].length)

                        }

                }

        }

}