misc/cgo/test/issue9026/issue9026.go

   1 package issue9026
   2
   3 // This file appears in its own package since the assertion tests the
   4 // per-package counter used to create fresh identifiers.
   5
   6 /*
   7 typedef struct { int i; } git_merge_file_input;
   8
   9 typedef struct { int j; } git_merge_file_options;
  10
  11 void git_merge_file(
  12         git_merge_file_input *in,
  13         git_merge_file_options *opts) {}
  14 */
  15 import "C"
  16 import (
  17         "fmt"
  18         "testing"
  19 )
  20
  21 func Test(t *testing.T) {
  22         var in C.git_merge_file_input
  23         var opts *C.git_merge_file_options
  24         C.git_merge_file(&in, opts)
  25
  26         // Test that the generated type names are deterministic.
  27         // (Previously this would fail about 10% of the time.)
  28         //
  29         // Brittle: the assertion may fail spuriously when the algorithm
  30         // changes, but should remain stable otherwise.
  31         got := fmt.Sprintf("%T %T", in, opts)
  32         want := "issue9026._Ctype_struct___0 *issue9026._Ctype_struct___1"
  33         if got != want {
  34                 t.Errorf("Non-deterministic type names: got %s, want %s", got, want)
  35         }
  36 }