1package util
 2
 3import (
 4	"testing"
 5
 6	"github.com/stretchr/testify/require"
 7
 8	"github.com/charmbracelet/x/powernap/pkg/lsp/protocol"
 9)
10
11func TestRangesOverlap(t *testing.T) {
12	t.Parallel()
13
14	tests := []struct {
15		name string
16		r1   protocol.Range
17		r2   protocol.Range
18		want bool
19	}{
20		{
21			name: "adjacent ranges do not overlap",
22			r1: protocol.Range{
23				Start: protocol.Position{Line: 0, Character: 0},
24				End:   protocol.Position{Line: 0, Character: 5},
25			},
26			r2: protocol.Range{
27				Start: protocol.Position{Line: 0, Character: 5},
28				End:   protocol.Position{Line: 0, Character: 10},
29			},
30			want: false,
31		},
32		{
33			name: "overlapping ranges",
34			r1: protocol.Range{
35				Start: protocol.Position{Line: 0, Character: 0},
36				End:   protocol.Position{Line: 0, Character: 8},
37			},
38			r2: protocol.Range{
39				Start: protocol.Position{Line: 0, Character: 5},
40				End:   protocol.Position{Line: 0, Character: 10},
41			},
42			want: true,
43		},
44		{
45			name: "non-overlapping with gap",
46			r1: protocol.Range{
47				Start: protocol.Position{Line: 0, Character: 0},
48				End:   protocol.Position{Line: 0, Character: 3},
49			},
50			r2: protocol.Range{
51				Start: protocol.Position{Line: 0, Character: 7},
52				End:   protocol.Position{Line: 0, Character: 10},
53			},
54			want: false,
55		},
56	}
57
58	for _, tt := range tests {
59		t.Run(tt.name, func(t *testing.T) {
60			t.Parallel()
61			got := rangesOverlap(tt.r1, tt.r2)
62			require.Equal(t, tt.want, got, "rangesOverlap(r1, r2)")
63			// Overlap should be symmetric
64			got2 := rangesOverlap(tt.r2, tt.r1)
65			require.Equal(t, tt.want, got2, "rangesOverlap(r2, r1) symmetry")
66		})
67	}
68}