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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)
                        }
                }
        }
}