github.com/sberex/go-sberex@v1.8.2-0.20181113200658-ed96ac38f7d7/node/service_test.go (about)

     1  // This file is part of the go-sberex library. The go-sberex library is 
     2  // free software: you can redistribute it and/or modify it under the terms 
     3  // of the GNU Lesser General Public License as published by the Free 
     4  // Software Foundation, either version 3 of the License, or (at your option)
     5  // any later version.
     6  //
     7  // The go-sberex library is distributed in the hope that it will be useful, 
     8  // but WITHOUT ANY WARRANTY; without even the implied warranty of
     9  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser 
    10  // General Public License <http://www.gnu.org/licenses/> for more details.
    11  
    12  package node
    13  
    14  import (
    15  	"fmt"
    16  	"io/ioutil"
    17  	"os"
    18  	"path/filepath"
    19  	"testing"
    20  )
    21  
    22  // Tests that databases are correctly created persistent or ephemeral based on
    23  // the configured service context.
    24  func TestContextDatabases(t *testing.T) {
    25  	// Create a temporary folder and ensure no database is contained within
    26  	dir, err := ioutil.TempDir("", "")
    27  	if err != nil {
    28  		t.Fatalf("failed to create temporary data directory: %v", err)
    29  	}
    30  	defer os.RemoveAll(dir)
    31  
    32  	if _, err := os.Stat(filepath.Join(dir, "database")); err == nil {
    33  		t.Fatalf("non-created database already exists")
    34  	}
    35  	// Request the opening/creation of a database and ensure it persists to disk
    36  	ctx := &ServiceContext{config: &Config{Name: "unit-test", DataDir: dir}}
    37  	db, err := ctx.OpenDatabase("persistent", 0, 0)
    38  	if err != nil {
    39  		t.Fatalf("failed to open persistent database: %v", err)
    40  	}
    41  	db.Close()
    42  
    43  	if _, err := os.Stat(filepath.Join(dir, "unit-test", "persistent")); err != nil {
    44  		t.Fatalf("persistent database doesn't exists: %v", err)
    45  	}
    46  	// Request th opening/creation of an ephemeral database and ensure it's not persisted
    47  	ctx = &ServiceContext{config: &Config{DataDir: ""}}
    48  	db, err = ctx.OpenDatabase("ephemeral", 0, 0)
    49  	if err != nil {
    50  		t.Fatalf("failed to open ephemeral database: %v", err)
    51  	}
    52  	db.Close()
    53  
    54  	if _, err := os.Stat(filepath.Join(dir, "ephemeral")); err == nil {
    55  		t.Fatalf("ephemeral database exists")
    56  	}
    57  }
    58  
    59  // Tests that already constructed services can be retrieves by later ones.
    60  func TestContextServices(t *testing.T) {
    61  	stack, err := New(testNodeConfig())
    62  	if err != nil {
    63  		t.Fatalf("failed to create protocol stack: %v", err)
    64  	}
    65  	// Define a verifier that ensures a NoopA is before it and NoopB after
    66  	verifier := func(ctx *ServiceContext) (Service, error) {
    67  		var objA *NoopServiceA
    68  		if ctx.Service(&objA) != nil {
    69  			return nil, fmt.Errorf("former service not found")
    70  		}
    71  		var objB *NoopServiceB
    72  		if err := ctx.Service(&objB); err != ErrServiceUnknown {
    73  			return nil, fmt.Errorf("latters lookup error mismatch: have %v, want %v", err, ErrServiceUnknown)
    74  		}
    75  		return new(NoopService), nil
    76  	}
    77  	// Register the collection of services
    78  	if err := stack.Register(NewNoopServiceA); err != nil {
    79  		t.Fatalf("former failed to register service: %v", err)
    80  	}
    81  	if err := stack.Register(verifier); err != nil {
    82  		t.Fatalf("failed to register service verifier: %v", err)
    83  	}
    84  	if err := stack.Register(NewNoopServiceB); err != nil {
    85  		t.Fatalf("latter failed to register service: %v", err)
    86  	}
    87  	// Start the protocol stack and ensure services are constructed in order
    88  	if err := stack.Start(); err != nil {
    89  		t.Fatalf("failed to start stack: %v", err)
    90  	}
    91  	defer stack.Stop()
    92  }