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assert.go
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assert.go
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// Copyright 2020 H2O.ai, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package wave
import (
"fmt"
"path/filepath"
"reflect"
"runtime"
"testing"
)
// https://medium.com/@benbjohnson/structuring-tests-in-go-46ddee7a25c
// Adapted from: https://github.com/benbjohnson/testing
// Eq fails if expected and actual are different
type Eq func(expected, actual interface{})
// Ok fails if cond is false
type Ok func(cond bool, v ...interface{})
// No fails if err is present
type No func(err error)
// Assert returns assertion functions for the given testing.TB instance.
func Assert(t testing.TB) (Eq, Ok, No) {
eq := func(actual, expected interface{}) {
if !reflect.DeepEqual(expected, actual) {
_, file, line, _ := runtime.Caller(1)
fmt.Printf("%s:%d:\n\nwant: %#v\n\ngot: %#v\n\n", filepath.Base(file), line, expected, actual)
t.FailNow()
}
}
ok := func(cond bool, v ...interface{}) {
if !cond {
_, file, line, _ := runtime.Caller(1)
var msg string
if len(v) > 0 {
msg = fmt.Sprintf("%v", v)
} else {
msg = "fail"
}
fmt.Printf("%s:%d: %v\n\n", filepath.Base(file), line, msg)
t.FailNow()
}
}
no := func(err error) {
if err != nil {
_, file, line, _ := runtime.Caller(1)
fmt.Printf("%s:%d: unexpected: %s\n\n", filepath.Base(file), line, err.Error())
t.FailNow()
}
}
return eq, ok, no
}