protected function createFixtures(array $fixtures)
    {
        // normalize fixture configurations
        $config = [];  // configuration provided in test case
        $aliases = [];  // class name => alias or class name

        foreach ($fixtures as $name => $fixture) {
            if (!is_array($fixture)) {
                $class = ltrim($fixture, '\\');
                $fixtures[$name] = ['class' => $class];
                $aliases[$class] = is_int($name) ? $class : $name;
            } elseif (isset($fixture['class'])) {
                $class = ltrim($fixture['class'], '\\');
                $config[$class] = $fixture;
                $aliases[$class] = $name;
            } else {
                throw new InvalidConfigException("You must specify 'class' for the fixture '$name'.");
            }
        }

        // create fixture instances
        $instances = [];
        $stack = array_reverse($fixtures);

        while (($fixture = array_pop($stack)) !== null) {
            if ($fixture instanceof Fixture) {
                $class = get_class($fixture);
                $name = isset($aliases[$class]) ? $aliases[$class] : $class;
                unset($instances[$name]);  // unset so that the fixture is added to the last in the next line
                $instances[$name] = $fixture;
            } else {
                $class = ltrim($fixture['class'], '\\');
                $name = isset($aliases[$class]) ? $aliases[$class] : $class;
                if (!isset($instances[$name])) {
                    $instances[$name] = false;

                    $stack[] = $fixture = app()->make($fixture['class']);
                    foreach ($fixture->depends as $dep) {
                        // need to use the configuration provided in test case
                        $stack[] = isset($config[$dep]) ? $config[$dep] : ['class' => $dep];
                    }
                } elseif ($instances[$name] === false) {
                    throw new InvalidConfigException("A circular dependency is detected for fixture '$class'.");
                }
            }
        }

        return $instances;
    }
protected function createFixtures(array $fixtures)
    {
        // normalize fixture configurations
        $config = [];  // configuration provided in test case
        $aliases = [];  // class name => alias or class name

        foreach ($fixtures as $name => $fixture) {
            if (!is_array($fixture)) {
                $class = ltrim($fixture, '\\');
                $fixtures[$name] = ['class' => $class];
                $aliases[$class] = is_int($name) ? $class : $name;
            } elseif (isset($fixture['class'])) {
                $class = ltrim($fixture['class'], '\\');
                $config[$class] = $fixture;
                $aliases[$class] = $name;
            } else {
                throw new InvalidConfigException("You must specify 'class' for the fixture '$name'.");
            }
        }

        // create fixture instances
        $instances = [];
        $stack = array_reverse($fixtures);

        while (($fixture = array_pop($stack)) !== null) {
            if ($fixture instanceof Fixture) {
                $class = get_class($fixture);
                $name = isset($aliases[$class]) ? $aliases[$class] : $class;
                unset($instances[$name]);  // unset so that the fixture is added to the last in the next line
                $instances[$name] = $fixture;
            } else {
                $class = ltrim($fixture['class'], '\\');
                $name = isset($aliases[$class]) ? $aliases[$class] : $class;
                if (!isset($instances[$name])) {
                    $instances[$name] = false;

                    $stack[] = $fixture = app()->make($fixture['class']);
                    foreach ($fixture->depends as $dep) {
                        // need to use the configuration provided in test case
                        $stack[] = isset($config[$dep]) ? $config[$dep] : ['class' => $dep];
                    }
                } elseif ($instances[$name] === false) {
                    throw new InvalidConfigException("A circular dependency is detected for fixture '$class'.");
                }
            }
        }

        return $instances;
    }
protected function createFixtures ( array $ fixtures ) { // normalize fixture configurations $ config = [ ] ; // configuration provided in test case $ aliases = [ ] ; // class name => alias or class name foreach ( $ fixtures as $ name => $ fixture ) { if ( ! is_array ( $ fixture ) ) { $ class = ltrim ( $ fixture , '\\' ) ; $ fixtures [ $ name ] = [ 'class' => $ class ] ; $ aliases [ $ class ] = is_int ( $ name ) ? $ class : $ name ; } elseif ( isset ( $ fixture [ 'class' ] ) ) { $ class = ltrim ( $ fixture [ 'class' ] , '\\' ) ; $ config [ $ class ] = $ fixture ; $ aliases [ $ class ] = $ name ; } else { throw new InvalidConfigException ( "You must specify 'class' for the fixture '$name'." ) ; } } // create fixture instances $ instances = [ ] ; $ stack = array_reverse ( $ fixtures ) ; while ( ( $ fixture = array_pop ( $ stack ) ) !== null ) { if ( $ fixture instanceof Fixture ) { $ class = get_class ( $ fixture ) ; $ name = isset ( $ aliases [ $ class ] ) ? $ aliases [ $ class ] : $ class ; unset ( $ instances [ $ name ] ) ; // unset so that the fixture is added to the last in the next line $ instances [ $ name ] = $ fixture ; } else { $ class = ltrim ( $ fixture [ 'class' ] , '\\' ) ; $ name = isset ( $ aliases [ $ class ] ) ? $ aliases [ $ class ] : $ class ; if ( ! isset ( $ instances [ $ name ] ) ) { $ instances [ $ name ] = false ; $ stack [ ] = $ fixture = app ( ) -> make ( $ fixture [ 'class' ] ) ; foreach ( $ fixture -> depends as $ dep ) { // need to use the configuration provided in test case $ stack [ ] = isset ( $ config [ $ dep ] ) ? $ config [ $ dep ] : [ 'class' => $ dep ] ; } } elseif ( $ instances [ $ name ] === false ) { throw new InvalidConfigException ( "A circular dependency is detected for fixture '$class'." ) ; } } } return $ instances ; }
Creates the specified fixture instances.
All dependent fixtures will also be created.

@param array $fixtures the fixtures to be created. You may provide fixture names or fixture configurations.
If this parameter is not provided, the fixtures specified in [[globalFixtures()]] and [[fixtures()]] will be created.

@throws InvalidConfigException if fixtures are not properly configured or if a circular dependency among
the fixtures is detected

@return Fixture[] the created fixture instances
Creates the specified fixture instances . All dependent fixtures will also be created .