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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package typeutil_test
import (
"fmt"
"go/ast"
"go/parser"
"go/token"
"go/types"
"testing"
"golang.org/x/tools/go/types/typeutil"
)
type closure map[string]*types.Package
func (c closure) Import(path string) (*types.Package, error) { return c[path], nil }
func TestDependencies(t *testing.T) {
packages := make(map[string]*types.Package)
conf := types.Config{
Importer: closure(packages),
}
fset := token.NewFileSet()
// All edges go to the right.
// /--D--B--A
// F \_C_/
// \__E_/
for i, content := range []string{
`package a`,
`package c; import (_ "a")`,
`package b; import (_ "a")`,
`package e; import (_ "c")`,
`package d; import (_ "b"; _ "c")`,
`package f; import (_ "d"; _ "e")`,
} {
f, err := parser.ParseFile(fset, fmt.Sprintf("%d.go", i), content, 0)
if err != nil {
t.Fatal(err)
}
pkg, err := conf.Check(f.Name.Name, fset, []*ast.File{f}, nil)
if err != nil {
t.Fatal(err)
}
packages[pkg.Path()] = pkg
}
for _, test := range []struct {
roots, want string
}{
{"a", "a"},
{"b", "ab"},
{"c", "ac"},
{"d", "abcd"},
{"e", "ace"},
{"f", "abcdef"},
{"be", "abce"},
{"eb", "aceb"},
{"de", "abcde"},
{"ed", "acebd"},
{"ef", "acebdf"},
} {
var pkgs []*types.Package
for _, r := range test.roots {
pkgs = append(pkgs, packages[string(r)])
}
var got string
for _, p := range typeutil.Dependencies(pkgs...) {
got += p.Path()
}
if got != test.want {
t.Errorf("Dependencies(%q) = %q, want %q", test.roots, got, test.want)
}
}
}
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