package main

import (
	"testing"

	"github.com/stretchr/testify/assert"
)

func Test_compactedRanges(t *testing.T) {
	tests := []struct {
		name   string // description of this test case
		ranges []idsRange
		want   []idsRange
	}{
		{
			name: "single",
			ranges: []idsRange{
				{0, 10},
			},
			want: []idsRange{
				{0, 10},
			},
		},
		{
			name: "identical",
			ranges: []idsRange{
				{0, 10},
				{0, 10},
				{0, 10},
				{20, 30},
				{20, 30},
			},
			want: []idsRange{
				{0, 10},
				{20, 30},
			},
		},
		{
			name: "simple",
			ranges: []idsRange{
				{0, 10},
				{2, 11},
				{20, 30},
			},
			want: []idsRange{
				{0, 11},
				{20, 30},
			},
		},
		{
			name: "swallows",
			ranges: []idsRange{
				{0, 10},
				{2, 8},
				{20, 30},
			},
			want: []idsRange{
				{0, 10},
				{20, 30},
			},
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			assert.Equal(t, tt.want, compactedRanges(tt.ranges))
		})
	}
}