test: add test case

spec/main_spec.rb

@@ -195,4 +195,38 @@ def run_script(commands)
       "tinydb > "
     ])
   end
+
+  it 'prints all rows in a multi-level tree' do
+    script = []
+    (1..20).each do |i|
+      script << "insert #{i} user#{i} person#{i}@example.com"
+    end
+    script << "select"
+    script << ".exit"
+    result = run_script(script)
+
+    expect(result[20...result.length]).to match_array([
+      "tinydb > (1, user1, person1@example.com)",
+      "(2, user2, person2@example.com)",
+      "(3, user3, person3@example.com)",
+      "(4, user4, person4@example.com)",
+      "(5, user5, person5@example.com)",
+      "(6, user6, person6@example.com)",
+      "(7, user7, person7@example.com)",
+      "(8, user8, person8@example.com)",
+      "(9, user9, person9@example.com)",
+      "(10, user10, person10@example.com)",
+      "(11, user11, person11@example.com)",
+      "(12, user12, person12@example.com)",
+      "(13, user13, person13@example.com)",
+      "(14, user14, person14@example.com)",
+      "(15, user15, person15@example.com)",
+      "(16, user16, person16@example.com)",
+      "(17, user17, person17@example.com)",
+      "(18, user18, person18@example.com)",
+      "(19, user19, person19@example.com)",
+      "(20, user20, person20@example.com)",
+      "Executed.", "tinydb > ",
+    ])
+  end
 end