/
embedded_walker_test.go
93 lines (77 loc) · 2 KB
/
embedded_walker_test.go
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package errcheck
import (
"go/ast"
"go/parser"
"go/token"
"go/types"
"testing"
)
const commonSrc = `
package p
type Inner struct {}
func (Inner) Method()
type Outer struct {Inner}
type OuterP struct {*Inner}
type InnerInterface interface {
Method()
}
type OuterInterface interface {InnerInterface}
type MiddleInterfaceStruct struct {OuterInterface}
type OuterInterfaceStruct struct {MiddleInterfaceStruct}
var c = `
type testCase struct {
selector string
expectedOk bool
expected []string
}
func TestWalkThroughEmbeddedInterfaces(t *testing.T) {
cases := []testCase{
testCase{"Inner{}.Method", false, nil},
testCase{"(&Inner{}).Method", false, nil},
testCase{"Outer{}.Method", false, nil},
testCase{"InnerInterface.Method", true, []string{"test.InnerInterface"}},
testCase{"OuterInterface.Method", true, []string{"test.OuterInterface", "test.InnerInterface"}},
testCase{"OuterInterfaceStruct.Method", true, []string{"test.OuterInterface", "test.InnerInterface"}},
}
for _, c := range cases {
fset := token.NewFileSet()
f, err := parser.ParseFile(fset, "test", commonSrc+c.selector, 0)
if err != nil {
t.Fatal(err)
}
conf := types.Config{}
info := types.Info{
Selections: make(map[*ast.SelectorExpr]*types.Selection),
}
_, err = conf.Check("test", fset, []*ast.File{f}, &info)
if err != nil {
t.Fatal(err)
}
ast.Inspect(f, func(n ast.Node) bool {
s, ok := n.(*ast.SelectorExpr)
if ok {
selection, ok := info.Selections[s]
if !ok {
t.Fatalf("no Selection!")
}
ts, ok := walkThroughEmbeddedInterfaces(selection)
if ok != c.expectedOk {
t.Errorf("expected ok %v got %v", c.expectedOk, ok)
return false
}
if !ok {
return false
}
if len(ts) != len(c.expected) {
t.Fatalf("expected %d types, got %d", len(c.expected), len(ts))
}
for i, e := range c.expected {
if e != ts[i].String() {
t.Errorf("mismatch at index %d: expected %s got %s", i, e, ts[i])
}
}
}
return true
})
}
}