| 1 | // Copyright 2017 The Go Authors. All rights reserved. |
|---|---|
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | //go:build go1.7 |
| 6 | // +build go1.7 |
| 7 | |
| 8 | package godoc |
| 9 | |
| 10 | import ( |
| 11 | "bytes" |
| 12 | "fmt" |
| 13 | "testing" |
| 14 | ) |
| 15 | |
| 16 | // Verify that scanIdentifier isn't quadratic. |
| 17 | // This doesn't actually measure and fail on its own, but it was previously |
| 18 | // very obvious when running by hand. |
| 19 | // |
| 20 | // TODO: if there's a reliable and non-flaky way to test this, do so. |
| 21 | // Maybe count user CPU time instead of wall time? But that's not easy |
| 22 | // to do portably in Go. |
| 23 | func TestStructField(t *testing.T) { |
| 24 | for _, n := range []int{10, 100, 1000, 10000} { |
| 25 | n := n |
| 26 | t.Run(fmt.Sprint(n), func(t *testing.T) { |
| 27 | var buf bytes.Buffer |
| 28 | fmt.Fprintf(&buf, "package foo\n\ntype T struct {\n") |
| 29 | for i := 0; i < n; i++ { |
| 30 | fmt.Fprintf(&buf, "\t// Field%d is foo.\n\tField%d int\n\n", i, i) |
| 31 | } |
| 32 | fmt.Fprintf(&buf, "}\n") |
| 33 | linkifySource(t, buf.Bytes()) |
| 34 | }) |
| 35 | } |
| 36 | } |
| 37 |
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