// Copyright 2016-2023, Pulumi Corporation.
//
// 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 diagtest provides testing utilities
// for code that uses the common/diag package.
package diagtest

import (
	"bytes"
	"testing"

	"github.com/pulumi/pulumi/sdk/v3/go/common/diag"
	"github.com/pulumi/pulumi/sdk/v3/go/common/diag/colors"
	"github.com/pulumi/pulumi/sdk/v3/go/common/testing/iotest"
)

// LogSink builds a diagnostic sink that logs to the given testing.TB.
//
// Messages are prefixed with [stdout] or [stderr]
// to indicate which stream they were written to.
func LogSink(t testing.TB) diag.Sink {
	return diag.DefaultSink(
		iotest.LogWriterPrefixed(t, "[stdout] "),
		iotest.LogWriterPrefixed(t, "[stderr] "),
		diag.FormatOptions{
			// Don't colorize test output.
			Color: colors.Never,
			Debug: true,
		},
	)
}

func MockSink(stdout, stderr *bytes.Buffer) diag.Sink {
	return diag.DefaultSink(
		stdout,
		stderr,
		diag.FormatOptions{
			Color: colors.Never,
			Debug: true,
		},
	)
}