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internal/rosa/gnu.go

@@ -25,13 +25,21 @@ func skipGNUTests(tests ...int) string {
 	slices.Sort(tests)
 
 	var buf strings.Builder
+
+	if tests[0] != 1 {
 		buf.WriteString("1-")
-	for _, n := range tests {
+	}
+
+	for i, n := range tests {
+		if n != 1 && (i == 0 || tests[i-1] != n-1) {
 			buf.WriteString(strconv.Itoa(n - 1))
 			buf.WriteString(" ")
+		}
+		if i == len(tests)-1 || tests[i+1] != n+1 {
 			buf.WriteString(strconv.Itoa(n + 1))
 			buf.WriteString("-")
 		}
+	}
 	return buf.String()
 }
 

internal/rosa/gnu_test.go

@@ -16,6 +16,8 @@ func TestSkipGNUTests(t *testing.T) {
 	}{
 		{[]int{764}, "1-763 765-"},
 		{[]int{764, 0xcafe, 37, 9}, "1-8 10-36 38-763 765-51965 51967-"},
+		{[]int{1, 2, 0xbed}, "3-3052 3054-"},
+		{[]int{3, 4}, "1-2 5-"},
 	}
 	for _, tc := range testCases {
 		t.Run(strings.Join(slices.Collect(func(yield func(string) bool) {