console_test.go 10.3 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package console

import (
	"bytes"
	"errors"
	"fmt"
	"io/ioutil"
	"os"
	"strings"
	"testing"
	"time"

	"github.com/ethereum/go-ethereum/common"
30
	"github.com/ethereum/go-ethereum/consensus/ethash"
31
	"github.com/ethereum/go-ethereum/core"
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68
	"github.com/ethereum/go-ethereum/eth"
	"github.com/ethereum/go-ethereum/internal/jsre"
	"github.com/ethereum/go-ethereum/node"
)

const (
	testInstance = "console-tester"
	testAddress  = "0x8605cdbbdb6d264aa742e77020dcbc58fcdce182"
)

// hookedPrompter implements UserPrompter to simulate use input via channels.
type hookedPrompter struct {
	scheduler chan string
}

func (p *hookedPrompter) PromptInput(prompt string) (string, error) {
	// Send the prompt to the tester
	select {
	case p.scheduler <- prompt:
	case <-time.After(time.Second):
		return "", errors.New("prompt timeout")
	}
	// Retrieve the response and feed to the console
	select {
	case input := <-p.scheduler:
		return input, nil
	case <-time.After(time.Second):
		return "", errors.New("input timeout")
	}
}

func (p *hookedPrompter) PromptPassword(prompt string) (string, error) {
	return "", errors.New("not implemented")
}
func (p *hookedPrompter) PromptConfirm(prompt string) (bool, error) {
	return false, errors.New("not implemented")
}
69 70
func (p *hookedPrompter) SetHistory(history []string)              {}
func (p *hookedPrompter) AppendHistory(command string)             {}
71
func (p *hookedPrompter) ClearHistory()                            {}
72 73 74 75 76 77
func (p *hookedPrompter) SetWordCompleter(completer WordCompleter) {}

// tester is a console test environment for the console tests to operate on.
type tester struct {
	workspace string
	stack     *node.Node
78
	ethereum  *eth.Ethereum
79 80 81 82 83 84 85 86 87 88 89 90 91 92 93
	console   *Console
	input     *hookedPrompter
	output    *bytes.Buffer
}

// newTester creates a test environment based on which the console can operate.
// Please ensure you call Close() on the returned tester to avoid leaks.
func newTester(t *testing.T, confOverride func(*eth.Config)) *tester {
	// Create a temporary storage for the node keys and initialize it
	workspace, err := ioutil.TempDir("", "console-tester-")
	if err != nil {
		t.Fatalf("failed to create temporary keystore: %v", err)
	}

	// Create a networkless protocol stack and start an Ethereum service within
94
	stack, err := node.New(&node.Config{DataDir: workspace, UseLightweightKDF: true, Name: testInstance})
95 96 97 98
	if err != nil {
		t.Fatalf("failed to create node: %v", err)
	}
	ethConf := &eth.Config{
99
		Genesis:   core.DeveloperGenesisBlock(15, common.Address{}),
100
		Etherbase: common.HexToAddress(testAddress),
101 102 103
		Ethash: ethash.Config{
			PowMode: ethash.ModeTest,
		},
104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133
	}
	if confOverride != nil {
		confOverride(ethConf)
	}
	if err = stack.Register(func(ctx *node.ServiceContext) (node.Service, error) { return eth.New(ctx, ethConf) }); err != nil {
		t.Fatalf("failed to register Ethereum protocol: %v", err)
	}
	// Start the node and assemble the JavaScript console around it
	if err = stack.Start(); err != nil {
		t.Fatalf("failed to start test stack: %v", err)
	}
	client, err := stack.Attach()
	if err != nil {
		t.Fatalf("failed to attach to node: %v", err)
	}
	prompter := &hookedPrompter{scheduler: make(chan string)}
	printer := new(bytes.Buffer)

	console, err := New(Config{
		DataDir:  stack.DataDir(),
		DocRoot:  "testdata",
		Client:   client,
		Prompter: prompter,
		Printer:  printer,
		Preload:  []string{"preload.js"},
	})
	if err != nil {
		t.Fatalf("failed to create JavaScript console: %v", err)
	}
	// Create the final tester and return
134
	var ethereum *eth.Ethereum
135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151
	stack.Service(&ethereum)

	return &tester{
		workspace: workspace,
		stack:     stack,
		ethereum:  ethereum,
		console:   console,
		input:     prompter,
		output:    printer,
	}
}

// Close cleans up any temporary data folders and held resources.
func (env *tester) Close(t *testing.T) {
	if err := env.console.Stop(false); err != nil {
		t.Errorf("failed to stop embedded console: %v", err)
	}
152 153
	if err := env.stack.Close(); err != nil {
		t.Errorf("failed to tear down embedded node: %v", err)
154 155 156 157 158 159 160 161 162 163 164 165 166
	}
	os.RemoveAll(env.workspace)
}

// Tests that the node lists the correct welcome message, notably that it contains
// the instance name, coinbase account, block number, data directory and supported
// console modules.
func TestWelcome(t *testing.T) {
	tester := newTester(t, nil)
	defer tester.Close(t)

	tester.console.Welcome()

167
	output := tester.output.String()
168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190
	if want := "Welcome"; !strings.Contains(output, want) {
		t.Fatalf("console output missing welcome message: have\n%s\nwant also %s", output, want)
	}
	if want := fmt.Sprintf("instance: %s", testInstance); !strings.Contains(output, want) {
		t.Fatalf("console output missing instance: have\n%s\nwant also %s", output, want)
	}
	if want := fmt.Sprintf("coinbase: %s", testAddress); !strings.Contains(output, want) {
		t.Fatalf("console output missing coinbase: have\n%s\nwant also %s", output, want)
	}
	if want := "at block: 0"; !strings.Contains(output, want) {
		t.Fatalf("console output missing sync status: have\n%s\nwant also %s", output, want)
	}
	if want := fmt.Sprintf("datadir: %s", tester.workspace); !strings.Contains(output, want) {
		t.Fatalf("console output missing coinbase: have\n%s\nwant also %s", output, want)
	}
}

// Tests that JavaScript statement evaluation works as intended.
func TestEvaluate(t *testing.T) {
	tester := newTester(t, nil)
	defer tester.Close(t)

	tester.console.Evaluate("2 + 2")
191
	if output := tester.output.String(); !strings.Contains(output, "4") {
192 193 194 195 196 197 198 199 200 201 202 203
		t.Fatalf("statement evaluation failed: have %s, want %s", output, "4")
	}
}

// Tests that the console can be used in interactive mode.
func TestInteractive(t *testing.T) {
	// Create a tester and run an interactive console in the background
	tester := newTester(t, nil)
	defer tester.Close(t)

	go tester.console.Interactive()

204
	// Wait for a prompt and send a statement back
205 206 207 208 209 210 211 212 213 214
	select {
	case <-tester.input.scheduler:
	case <-time.After(time.Second):
		t.Fatalf("initial prompt timeout")
	}
	select {
	case tester.input.scheduler <- "2+2":
	case <-time.After(time.Second):
		t.Fatalf("input feedback timeout")
	}
215
	// Wait for the second prompt and ensure first statement was evaluated
216 217 218 219 220
	select {
	case <-tester.input.scheduler:
	case <-time.After(time.Second):
		t.Fatalf("secondary prompt timeout")
	}
221
	if output := tester.output.String(); !strings.Contains(output, "4") {
222 223 224 225 226 227 228 229 230 231 232
		t.Fatalf("statement evaluation failed: have %s, want %s", output, "4")
	}
}

// Tests that preloaded JavaScript files have been executed before user is given
// input.
func TestPreload(t *testing.T) {
	tester := newTester(t, nil)
	defer tester.Close(t)

	tester.console.Evaluate("preloaded")
233
	if output := tester.output.String(); !strings.Contains(output, "some-preloaded-string") {
234 235 236 237 238 239 240 241 242 243 244 245
		t.Fatalf("preloaded variable missing: have %s, want %s", output, "some-preloaded-string")
	}
}

// Tests that JavaScript scripts can be executes from the configured asset path.
func TestExecute(t *testing.T) {
	tester := newTester(t, nil)
	defer tester.Close(t)

	tester.console.Execute("exec.js")

	tester.console.Evaluate("execed")
246
	if output := tester.output.String(); !strings.Contains(output, "some-executed-string") {
247 248 249 250 251
		t.Fatalf("execed variable missing: have %s, want %s", output, "some-executed-string")
	}
}

// Tests that the JavaScript objects returned by statement executions are properly
252
// pretty printed instead of just displaying "[object]".
253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277
func TestPrettyPrint(t *testing.T) {
	tester := newTester(t, nil)
	defer tester.Close(t)

	tester.console.Evaluate("obj = {int: 1, string: 'two', list: [3, 3, 3], obj: {null: null, func: function(){}}}")

	// Define some specially formatted fields
	var (
		one   = jsre.NumberColor("1")
		two   = jsre.StringColor("\"two\"")
		three = jsre.NumberColor("3")
		null  = jsre.SpecialColor("null")
		fun   = jsre.FunctionColor("function()")
	)
	// Assemble the actual output we're after and verify
	want := `{
  int: ` + one + `,
  list: [` + three + `, ` + three + `, ` + three + `],
  obj: {
    null: ` + null + `,
    func: ` + fun + `
  },
  string: ` + two + `
}
`
278
	if output := tester.output.String(); output != want {
279 280 281
		t.Fatalf("pretty print mismatch: have %s, want %s", output, want)
	}
}
282 283 284 285 286 287 288 289

// Tests that the JavaScript exceptions are properly formatted and colored.
func TestPrettyError(t *testing.T) {
	tester := newTester(t, nil)
	defer tester.Close(t)
	tester.console.Evaluate("throw 'hello'")

	want := jsre.ErrorColor("hello") + "\n"
290
	if output := tester.output.String(); output != want {
291 292 293
		t.Fatalf("pretty error mismatch: have %s, want %s", output, want)
	}
}
294 295 296 297 298 299 300 301 302

// Tests that tests if the number of indents for JS input is calculated correct.
func TestIndenting(t *testing.T) {
	testCases := []struct {
		input               string
		expectedIndentCount int
	}{
		{`var a = 1;`, 0},
		{`"some string"`, 0},
303
		{`"some string with (parenthesis`, 0},
304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339
		{`"some string with newline
		("`, 0},
		{`function v(a,b) {}`, 0},
		{`function f(a,b) { var str = "asd("; };`, 0},
		{`function f(a) {`, 1},
		{`function f(a, function(b) {`, 2},
		{`function f(a, function(b) {
		     var str = "a)}";
		  });`, 0},
		{`function f(a,b) {
		   var str = "a{b(" + a, ", " + b;
		   }`, 0},
		{`var str = "\"{"`, 0},
		{`var str = "'("`, 0},
		{`var str = "\\{"`, 0},
		{`var str = "\\\\{"`, 0},
		{`var str = 'a"{`, 0},
		{`var obj = {`, 1},
		{`var obj = { {a:1`, 2},
		{`var obj = { {a:1}`, 1},
		{`var obj = { {a:1}, b:2}`, 0},
		{`var obj = {}`, 0},
		{`var obj = {
			a: 1, b: 2
		}`, 0},
		{`var test = }`, -1},
		{`var str = "a\""; var obj = {`, 1},
	}

	for i, tt := range testCases {
		counted := countIndents(tt.input)
		if counted != tt.expectedIndentCount {
			t.Errorf("test %d: invalid indenting: have %d, want %d", i, counted, tt.expectedIndentCount)
		}
	}
}