108 lines
3.0 KiB
Go
108 lines
3.0 KiB
Go
// Copyright 2022 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package main
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import (
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"bytes"
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"fmt"
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"go/ast"
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"go/importer"
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"go/parser"
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"go/token"
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"go/types"
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"os"
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"path/filepath"
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"testing"
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)
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// Package RLP is loaded only once and reused for all tests.
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var (
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testFset = token.NewFileSet()
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testImporter = importer.ForCompiler(testFset, "source", nil).(types.ImporterFrom)
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testPackageRLP *types.Package
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)
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func init() {
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cwd, err := os.Getwd()
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if err != nil {
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panic(err)
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}
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testPackageRLP, err = testImporter.ImportFrom(pathOfPackageRLP, cwd, 0)
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if err != nil {
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panic(fmt.Errorf("can't load package RLP: %v", err))
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}
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}
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var tests = []string{"uints", "nil", "rawvalue", "optional", "bigint", "uint256"}
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func TestOutput(t *testing.T) {
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for _, test := range tests {
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test := test
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t.Run(test, func(t *testing.T) {
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inputFile := filepath.Join("testdata", test+".in.txt")
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outputFile := filepath.Join("testdata", test+".out.txt")
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bctx, typ, err := loadTestSource(inputFile, "Test")
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if err != nil {
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t.Fatal("error loading test source:", err)
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}
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output, err := bctx.generate(typ, true, true)
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if err != nil {
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t.Fatal("error in generate:", err)
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}
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// Set this environment variable to regenerate the test outputs.
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if os.Getenv("WRITE_TEST_FILES") != "" {
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os.WriteFile(outputFile, output, 0644)
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}
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// Check if output matches.
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wantOutput, err := os.ReadFile(outputFile)
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if err != nil {
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t.Fatal("error loading expected test output:", err)
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}
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if !bytes.Equal(output, wantOutput) {
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t.Fatalf("output mismatch, want: %v got %v", string(wantOutput), string(output))
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}
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})
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}
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}
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func loadTestSource(file string, typeName string) (*buildContext, *types.Named, error) {
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// Load the test input.
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content, err := os.ReadFile(file)
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if err != nil {
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return nil, nil, err
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}
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f, err := parser.ParseFile(testFset, file, content, 0)
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if err != nil {
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return nil, nil, err
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}
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conf := types.Config{Importer: testImporter}
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pkg, err := conf.Check("test", testFset, []*ast.File{f}, nil)
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if err != nil {
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return nil, nil, err
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}
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// Find the test struct.
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bctx := newBuildContext(testPackageRLP)
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typ, err := lookupStructType(pkg.Scope(), typeName)
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if err != nil {
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return nil, nil, fmt.Errorf("can't find type %s: %v", typeName, err)
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}
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return bctx, typ, nil
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}
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