github.com/jd-ly/tools@v0.5.7/godoc/godoc17_test.go (about)

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