go-common/app/tool/gengo/generator/snippet_writer_test.go

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2019-04-22 10:49:16 +00:00
package generator_test
import (
"bytes"
"strings"
"testing"
"go-common/app/tool/gengo/generator"
"go-common/app/tool/gengo/namer"
"go-common/app/tool/gengo/parser"
)
func construct(t *testing.T, files map[string]string) *generator.Context {
b := parser.New()
for name, src := range files {
if err := b.AddFileForTest("/tmp/"+name, name, []byte(src)); err != nil {
t.Fatal(err)
}
}
c, err := generator.NewContext(b, namer.NameSystems{
"public": namer.NewPublicNamer(0),
"private": namer.NewPrivateNamer(0),
}, "public")
if err != nil {
t.Fatal(err)
}
return c
}
func TestSnippetWriter(t *testing.T) {
var structTest = map[string]string{
"base/foo/proto/foo.go": `
package foo
// Blah is a test.
// A test, I tell you.
type Blah struct {
// A is the first field.
A int64 ` + "`" + `json:"a"` + "`" + `
// B is the second field.
// Multiline comments work.
B string ` + "`" + `json:"b"` + "`" + `
}
`,
}
c := construct(t, structTest)
b := &bytes.Buffer{}
err := generator.NewSnippetWriter(b, c, "$", "$").
Do("$.|public$$.|private$", c.Order[0]).
Error()
if err != nil {
t.Errorf("Unexpected error %v", err)
}
if e, a := "Blahblah", b.String(); e != a {
t.Errorf("Expected %q, got %q", e, a)
}
err = generator.NewSnippetWriter(b, c, "$", "$").
Do("$.|public", c.Order[0]).
Error()
if err == nil {
t.Errorf("expected error on invalid template")
} else {
// Dear reader, I apologize for making the worst change
// detection test in the history of ever.
if e, a := "snippet_writer_test.go", err.Error(); !strings.Contains(a, e) {
t.Errorf("Expected %q but didn't find it in %q", e, a)
}
}
}