Use travis, fix bug in fuzzer rounding

.travis.yml

@@ -1,6 +1,13 @@
 language: ruby
+cache: bundler
+
 rvm:
  - 2.3
 
 services:
- - mysql
+ - mysql
+
+before_script:
+ - cp .travis/my.cnf ~/.my.cnf
+ - mysql -e 'create database shiba_test;'
+ - mysql shiba_test -e 'source test/structure.sql'

.travis/my.cnf

@@ -0,0 +1,3 @@
+[client]
+user = travis
+password =

lib/shiba/fuzzer.rb

@@ -50,7 +50,8 @@ def guess_table_sizes
       index_counts = connection.query(index_count_query).to_a
 
       # 90th table percentile based on number of indexes
-      large_table_idx = (index_counts.size * 0.9).round
+      # round down so we don't blow up on small tables
+      large_table_idx = (index_counts.size * 0.9).floor
       large_table_index_count = index_counts[large_table_idx]["index_count"].to_f
 
       sizes = Hash[index_counts.map(&:values)]

lib/shiba/index_stats.rb

@@ -3,11 +3,16 @@
 
 module Shiba
   class IndexStats
+
     def initialize(tables = {})
       @tables = tables
       build_from_hash!
     end
 
+    def any?
+      @tables.any?
+    end
+
     Table = Struct.new(:name, :count, :indexes) do
       def encode_with(coder)
         coder.map = self.to_h.stringify_keys
@@ -203,4 +208,3 @@ def each_index_column(&block)
     end
   end
 end
-

test/backtrace_test.rb

@@ -1,7 +1,6 @@
 require 'helper'
 require 'shiba/backtrace'
 
-
 describe "Backtrace" do
 
   it "doesn't blow up" do

test/integration_test.rb

@@ -0,0 +1,15 @@
+require 'helper'
+require 'shiba'
+require 'shiba/fuzzer'
+
+describe "Connection" do
+
+  it "doesn't blow up" do
+    Shiba.configure('database' => 'shiba_test', 'default_file' => '~/.my.cnf', 'default_group' => 'client')
+    assert_equal 'shiba_test', Shiba.connection.query("select database() as db").first["db"]
+
+    stats = Shiba::Fuzzer.new(Shiba.connection).fuzz!
+    assert stats.any?, stats.inspect
+  end
+
+end

test/structure.sql

@@ -0,0 +1,28 @@
+CREATE TABLE `users` (
+  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `organization_id` int(11) DEFAULT NULL,
+  `email` varchar(255) NOT NULL,
+  `name` varchar(255) DEFAULT '',
+  `created_at` datetime NOT NULL,
+  `updated_at` datetime(3) NOT NULL,
+  PRIMARY KEY (`id`),
+  KEY `index_users_on_organization_id` (`organization_id`)
+);
+
+CREATE TABLE `organizations` (
+  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `name` varchar(255) DEFAULT '',
+  `created_at` datetime NOT NULL,
+  `updated_at` datetime(3) NOT NULL,
+  PRIMARY KEY (`id`)
+);
+
+CREATE TABLE `comments` (
+  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `user_id` int(11) NOT NULL,
+  `body` mediumtext NOT NULL,
+  `created_at` datetime NOT NULL,
+  `updated_at` datetime(3) NOT NULL,
+  PRIMARY KEY (`id`),
+  KEY `index_comments_on_user_id` (`user_id`)
+);