github.com/bhameyie/otto@v0.2.1-0.20160406174117-16052efa52ec/command/plugin_manager_test.go (about)

     1  package command
     2  
     3  import (
     4  	"fmt"
     5  	"io/ioutil"
     6  	"os"
     7  	"path/filepath"
     8  	"reflect"
     9  	"testing"
    10  
    11  	"github.com/hashicorp/otto/app"
    12  	"github.com/hashicorp/otto/plugin"
    13  )
    14  
    15  const TestPluginProcessMagicCookie = "abcd"
    16  
    17  func TestPluginLoad(t *testing.T) {
    18  	plugin := testPlugin(t, "mock")
    19  	if err := plugin.Load(); err != nil {
    20  		t.Fatalf("err: %s", err)
    21  	}
    22  
    23  	if !reflect.DeepEqual(plugin.AppMeta, testPluginMockMeta) {
    24  		t.Fatalf("bad: %#v", plugin.AppMeta)
    25  	}
    26  }
    27  
    28  func TestPluginLoad_used(t *testing.T) {
    29  	plugin := testPlugin(t, "mock")
    30  	if err := plugin.Load(); err != nil {
    31  		t.Fatalf("err: %s", err)
    32  	}
    33  
    34  	if plugin.Used() {
    35  		t.Fatal("should not be used")
    36  	}
    37  
    38  	if _, err := plugin.App(); err != nil {
    39  		t.Fatalf("err: %s", err)
    40  	}
    41  
    42  	if !plugin.Used() {
    43  		t.Fatal("should be used")
    44  	}
    45  }
    46  
    47  func TestPluginManager_saveLoad(t *testing.T) {
    48  	mock := testPlugin(t, "mock")
    49  	mgr := &PluginManager{
    50  		plugins: []*Plugin{
    51  			mock,
    52  			testPlugin(t, "empty"),
    53  			testPlugin(t, "empty"),
    54  			testPlugin(t, "empty"),
    55  		},
    56  	}
    57  
    58  	if err := mgr.LoadAll(); err != nil {
    59  		t.Fatalf("err: %s", err)
    60  	}
    61  
    62  	// Use only the mock
    63  	if _, err := mock.App(); err != nil {
    64  		t.Fatalf("err: %s", err)
    65  	}
    66  	if !mock.Used() {
    67  		t.Fatal("should be used")
    68  	}
    69  
    70  	// Create the temporary file to save the data
    71  	td, err := ioutil.TempDir("", "otto")
    72  	if err != nil {
    73  		t.Fatalf("err: %s", err)
    74  	}
    75  	defer os.RemoveAll(td)
    76  	path := filepath.Join(td, "used")
    77  
    78  	if err := mgr.StoreUsed(path); err != nil {
    79  		t.Fatalf("err: %s", err)
    80  	}
    81  
    82  	// Create a new manager and load only the used
    83  	mgr = &PluginManager{}
    84  	if err := mgr.LoadUsed(path); err != nil {
    85  		t.Fatalf("err: %s", err)
    86  	}
    87  	if v := mgr.Plugins(); len(v) != 1 {
    88  		t.Fatalf("bad: %#v", v)
    89  	}
    90  }
    91  
    92  // testPlugin returns a test plugin of the given name. This should correspond
    93  // to one of the availabile plugins.
    94  func testPlugin(t *testing.T, n string) *Plugin {
    95  	var result Plugin
    96  	result.Path = os.Args[0]
    97  	result.Args = []string{
    98  		"-test.run=TestPluginProcess",
    99  		"--",
   100  		TestPluginProcessMagicCookie,
   101  		n,
   102  	}
   103  
   104  	return &result
   105  }
   106  
   107  func TestPluginProcess(*testing.T) {
   108  	// Find where our arguments start based on "--"
   109  	args := os.Args
   110  	for len(args) > 0 {
   111  		if args[0] == "--" {
   112  			args = args[1:]
   113  			break
   114  		}
   115  
   116  		args = args[1:]
   117  	}
   118  	if len(args) < 1 {
   119  		return
   120  	}
   121  	if args[0] != TestPluginProcessMagicCookie {
   122  		return
   123  	}
   124  
   125  	// We know we're in a requested plugin process, we want to completely
   126  	// exit at the end of this so let's defer that.
   127  	defer os.Exit(0)
   128  
   129  	// Determine what plugin we're supposed to be serving
   130  	var opts plugin.ServeOpts
   131  	switch args[1] {
   132  	case "empty":
   133  		appImpl := &app.Mock{}
   134  		opts.AppFunc = func() app.App {
   135  			return appImpl
   136  		}
   137  	case "mock":
   138  		appImpl := &app.Mock{
   139  			MetaResult: testPluginMockMeta,
   140  		}
   141  		opts.AppFunc = func() app.App {
   142  			return appImpl
   143  		}
   144  	default:
   145  		fmt.Fprintf(os.Stderr, "Invalid plugin: %s\n", args[1])
   146  		os.Exit(2)
   147  	}
   148  
   149  	// Serve the plugin!
   150  	plugin.Serve(&opts)
   151  }
   152  
   153  var testPluginMockMeta = &app.Meta{
   154  	Tuples: []app.Tuple{
   155  		app.Tuple{"test", "test", "test"},
   156  	},
   157  }