Rename restapi to api (#3176)

Signed-off-by: Daniel Valdivia <18384552+dvaldivia@users.noreply.github.com>

api/admin_trace_test.go

@@ -0,0 +1,119 @@
+// This file is part of MinIO Console Server
+// Copyright (c) 2021 MinIO, Inc.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package api
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"testing"
+
+	"github.com/minio/madmin-go/v3"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAdminTrace(t *testing.T) {
+	assert := assert.New(t)
+	adminClient := AdminClientMock{}
+	mockWSConn := mockConn{}
+	function := "startTraceInfo(ctx, )"
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	testReceiver := make(chan shortTraceMsg, 5)
+	textToReceive := "test"
+	testStreamSize := 5
+	isClosed := false // testReceiver is closed?
+
+	// Test-1: Serve Trace with no errors until trace finishes sending
+	// define mock function behavior for minio server Trace
+	minioServiceTraceMock = func(ctx context.Context, threshold int64, s3, internal, storage, os, errTrace bool) <-chan madmin.ServiceTraceInfo {
+		ch := make(chan madmin.ServiceTraceInfo)
+		// Only success, start a routine to start reading line by line.
+		go func(ch chan<- madmin.ServiceTraceInfo) {
+			defer close(ch)
+			lines := make([]int, testStreamSize)
+			// mocking sending 5 lines of info
+			for range lines {
+				info := madmin.TraceInfo{
+					FuncName: textToReceive,
+				}
+				ch <- madmin.ServiceTraceInfo{Trace: info}
+			}
+		}(ch)
+		return ch
+	}
+	writesCount := 1
+	// mock connection WriteMessage() no error
+	connWriteMessageMock = func(messageType int, data []byte) error {
+		// emulate that receiver gets the message written
+		var t shortTraceMsg
+		_ = json.Unmarshal(data, &t)
+		if writesCount == testStreamSize {
+			// for testing we need to close the receiver channel
+			if !isClosed {
+				close(testReceiver)
+				isClosed = true
+			}
+			return nil
+		}
+		testReceiver <- t
+		writesCount++
+		return nil
+	}
+	if err := startTraceInfo(ctx, mockWSConn, adminClient, TraceRequest{s3: true, internal: true, storage: true, os: true, onlyErrors: false}); err != nil {
+		t.Errorf("Failed on %s:, error occurred: %s", function, err.Error())
+	}
+	// check that the TestReceiver got the same number of data from trace.
+	for i := range testReceiver {
+		assert.Equal(textToReceive, i.FuncName)
+	}
+
+	// Test-2: if error happens while writing, return error
+	connWriteMessageMock = func(messageType int, data []byte) error {
+		return fmt.Errorf("error on write")
+	}
+	if err := startTraceInfo(ctx, mockWSConn, adminClient, TraceRequest{}); assert.Error(err) {
+		assert.Equal("error on write", err.Error())
+	}
+
+	// Test-3: error happens on serviceTrace Minio, trace should stop
+	// and error shall be returned.
+	minioServiceTraceMock = func(ctx context.Context, threshold int64, s3, internal, storage, os, errTrace bool) <-chan madmin.ServiceTraceInfo {
+		ch := make(chan madmin.ServiceTraceInfo)
+		// Only success, start a routine to start reading line by line.
+		go func(ch chan<- madmin.ServiceTraceInfo) {
+			defer close(ch)
+			lines := make([]int, 2)
+			// mocking sending 5 lines of info
+			for range lines {
+				info := madmin.TraceInfo{
+					NodeName: "test",
+				}
+				ch <- madmin.ServiceTraceInfo{Trace: info}
+			}
+			ch <- madmin.ServiceTraceInfo{Err: fmt.Errorf("error on trace")}
+		}(ch)
+		return ch
+	}
+	connWriteMessageMock = func(messageType int, data []byte) error {
+		return nil
+	}
+	if err := startTraceInfo(ctx, mockWSConn, adminClient, TraceRequest{}); assert.Error(err) {
+		assert.Equal("error on trace", err.Error())
+	}
+}