func analyzeCode(scope *types.Scope, docs *doc.Package, variable string) (imports.Importer, []fn, error) {
pkg := docs.Name
v, ok := scope.Lookup(variable).(*types.Var)
if v == nil {
return nil, nil, fmt.Errorf("impossible to find variable %s", variable)
}
if !ok {
return nil, nil, fmt.Errorf("%s must be a variable", variable)
}
var vType interface {
NumMethods() int
Method(int) *types.Func
}
switch t := v.Type().(type) {
case *types.Interface:
vType = t
case *types.Pointer:
vType = t.Elem().(*types.Named)
case *types.Named:
vType = t
if t, ok := t.Underlying().(*types.Interface); ok {
vType = t
}
default:
return nil, nil, fmt.Errorf("variable is of an invalid type: %T", v.Type().Underlying())
}
importer := imports.New(pkg)
var funcs []fn
for i := 0; i < vType.NumMethods(); i++ {
f := vType.Method(i)
if !f.Exported() {
continue
}
sig := f.Type().(*types.Signature)
funcs = append(funcs, fn{
WrappedVar: variable,
Name: f.Name(),
CurrentPkg: pkg,
TypeInfo: f,
})
importer.AddImportsFrom(sig.Params())
importer.AddImportsFrom(sig.Results())
}
return importer, funcs, nil
}
// analyzeCode takes the types scope and the docs and returns the import
// information and information about all the assertion functions.
func analyzeCode(scope *types.Scope, docs *doc.Package) (imports.Importer, []testFunc, error) {
testingT := scope.Lookup("TestingT").Type().Underlying().(*types.Interface)
importer := imports.New(*outputPkg)
var funcs []testFunc
// Go through all the top level functions
for _, fdocs := range docs.Funcs {
// Find the function
obj := scope.Lookup(fdocs.Name)
fn, ok := obj.(*types.Func)
if !ok {
continue
}
// Check function signatuer has at least two arguments
sig := fn.Type().(*types.Signature)
if sig.Params().Len() < 2 {
continue
}
// Check first argument is of type testingT
first, ok := sig.Params().At(0).Type().(*types.Named)
if !ok {
continue
}
firstType, ok := first.Underlying().(*types.Interface)
if !ok {
continue
}
if !types.Implements(firstType, testingT) {
continue
}
funcs = append(funcs, testFunc{*outputPkg, fdocs, fn})
importer.AddImportsFrom(sig.Params())
}
return importer, funcs, nil
}