Command gencodec generates marshaling methods for Go struct types.
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gencodec/main_test.go

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// Copyright 2017 Felix Lange <fjl@twurst.com>.
// Use of this source code is governed by the MIT license,
// which can be found in the LICENSE file.
package main
import (
"io/ioutil"
"path/filepath"
"testing"
"github.com/kylelemons/godebug/diff"
)
// 'golden' tests. These tests compare the output code with the expected
// code in internal/tests/*/output.go. The expected can be updated using
//
// go generate ./internal/...
func TestMapConv(t *testing.T) {
runGoldenTest(t, Config{Dir: "mapconv", Type: "X", FieldOverride: "Xo", Formats: AllFormats})
}
func TestSliceConv(t *testing.T) {
runGoldenTest(t, Config{Dir: "sliceconv", Type: "X", FieldOverride: "Xo", Formats: AllFormats})
}
func TestNameClash(t *testing.T) {
runGoldenTest(t, Config{Dir: "nameclash", Type: "Y", FieldOverride: "Yo", Formats: AllFormats})
}
func runGoldenTest(t *testing.T, cfg Config) {
cfg.Dir = filepath.Join("internal", "tests", cfg.Dir)
want, err := ioutil.ReadFile(filepath.Join(cfg.Dir, "output.go"))
if err != nil {
t.Fatal(err)
}
code, err := cfg.process()
if err != nil {
t.Fatal(err)
}
if d := diff.Diff(string(want), string(code)); d != "" {
t.Errorf("output mismatch\n\n%s", d)
}
}