func Example() {
file, fset := parse(`package main
func init() {
i := 1
if true {
var i = 2
}
}`)
scopes.WalkFile(WarnShadow{fset}, file)
// Output: 5: Warning, shadowed i
}
// TODO(elazar): more complex tests:
// 1. What should happen when I `import . "foo"`, and use `var foo` from other package?
func TestSimpleUnused(t *testing.T) {
for i, c := range UnusedSimple {
if *ncase != i && *ncase > 0 {
continue
}
file, _ := parse(c.body, t)
unused := []string{}
scopes.WalkFile(NewUnused(unusedNames(func(name string) {
unused = append(unused, name)
})), file)
if fmt.Sprint(unused) != fmt.Sprint(c.expUnused) {
t.Errorf("Case #%d:\n%s\n Expected unused %v got %v", i, c.body, c.expUnused, unused)
}
}
}
func main() {
if len(os.Args) == 1 {
usage()
return
}
f := func(p *patch.PatchableFile) patch.Patches {
patches := &visitors.PatchUnused{patch.Patches{}}
autoimport := visitors.NewAutoImporter(p.File)
scopes.WalkFile(visitors.NewMultiVisitor(visitors.NewUnused(patches), autoimport), p.File)
return append(patches.Patches, autoimport.Patches...)
}
if err := instrument.InstrumentCmd(f, os.Args...); err != nil {
fmt.Println(err)
os.Exit(-1)
}
}