[DDW-614] add unbound mnemonics test case

features/mnemonics-generation-and-validation.feature

@@ -1,9 +1,13 @@
-@unit @slow
 Feature: Mnemonics generation and validation
 
   As a developer I want to be sure our mnemonic
   (12-word recovery phrase) is correctly generated/validated
 
+  @unit @slow
   Scenario: All generated wallet recovery mnemonics are valid
     Given I generate 10000 wallet recovery mnemonics
     Then all generated wallet recovery mnemonics should be valid
+
+  @unbound @mnemonics
+  Scenario: Unbound manual test run gives no invalid mnemeonics
+    Given I generate and validate an unbound number of wallet recovery mnemonics

features/tests/unit/steps/mnemonics-steps.js

@@ -5,6 +5,9 @@ import { generateAccountMnemonics } from '../../../../source/renderer/app/api/ut
 import { isValidMnemonic } from '../../../../source/common/crypto/decrypt';
 import { WALLET_RECOVERY_PHRASE_WORD_COUNT } from '../../../../source/renderer/app/config/cryptoConfig';
 
+const isValidWalletRecoveryPhrase = mnemonic =>
+  isValidMnemonic(mnemonic, WALLET_RECOVERY_PHRASE_WORD_COUNT);
+
 Given('I generate {int} wallet recovery mnemonics', function(
   numberOfMnemonics
 ) {
@@ -15,8 +18,25 @@ Given('I generate {int} wallet recovery mnemonics', function(
 
 Then('all generated wallet recovery mnemonics should be valid', function() {
   for (const mnemonic of this.context.mnemonics) {
-    if (!isValidMnemonic(mnemonic, WALLET_RECOVERY_PHRASE_WORD_COUNT)) {
+    if (!isValidWalletRecoveryPhrase(mnemonic)) {
       throw new Error(`"${mnemonic}" is not valid`);
     }
   }
 });
+
+Given(
+  'I generate and validate an unbound number of wallet recovery mnemonics',
+  function() {
+    let numberOfTestsExecuted = 0;
+    while (true) {
+      const mnemonic = generateAccountMnemonics().join(' ');
+      if (!isValidWalletRecoveryPhrase(mnemonic)) {
+        throw new Error(`"${mnemonic}" is not valid`);
+      }
+      numberOfTestsExecuted++;
+      process.stdout.clearLine();
+      process.stdout.cursorTo(0);
+      process.stdout.write(numberOfTestsExecuted + ' mnemonics validated.');
+    }
+  }
+);

package.json

@@ -12,6 +12,7 @@
     "test": "NODE_ENV=test yarn build && yarn test:unit && yarn test:ui",
     "test:unit": "yarn cucumber --require 'features/tests/unit/**/*.js' --tags '@unit and not @skip'",
     "test:unit:watch": "nodemon --watch source --watch features --exec \"yarn test:unit --tags '@unit and @watch'\"",
+    "test:unit:unbound": "yarn cucumber --require 'features/tests/unit/**/*.js' --tags '@unbound and not @skip'",
     "test:ui": "yarn cucumber --require 'features/tests/ui/**/*.js' --tags '@ui and not @skip'",
     "test:ui:watch": "gulp test:ui:watch",
     "cucumber": "cross-env NODE_ENV=test cucumber-js --require-module @babel/register -f node_modules/cucumber-pretty --format-options '{\"snippetInterface\": \"async-await\"}'",