neotest: sort coverage blocks within a test scope

Make the behaviour similar to the `go test` output. It's not a problem
for the `go cover` tool, but the sorted file is easier to debug and analize.

Signed-off-by: Anna Shaleva <shaleva.ann@nspcc.ru>

pkg/neotest/coverage.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"slices"
 	"strconv"
 	"sync"
 	"testing"
@@ -201,6 +202,27 @@ func processCover() map[documentName][]*coverBlock {
 		for _, b := range mappedBlocks {
 			blocks = append(blocks, b)
 		}
+		slices.SortFunc(blocks, func(a, b *coverBlock) int {
+			if a.startLine != b.startLine {
+				return int(a.startLine - b.startLine)
+			}
+			if a.endLine != b.endLine {
+				return int(a.endLine - b.endLine)
+			}
+			if a.startCol != b.startCol {
+				return int(a.startCol - b.startCol)
+			}
+			if a.endCol != b.endCol {
+				return int(a.endCol - b.endCol)
+			}
+			if a.stmts != b.stmts {
+				return int(a.stmts - b.stmts)
+			}
+			if a.counts != b.counts {
+				return int(a.counts - b.counts)
+			}
+			return 0
+		})
 		cover[documentName] = blocks
 	}