diff --git a/tests/ruby/test.rb b/tests/ruby/test.rb
new file mode 100644
index 0000000..6639f7f
--- /dev/null
+++ b/tests/ruby/test.rb
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+require 'date'
+
+# A person
+class Person
+  attr_reader :born, :name
+
+  def initialize(born, name)
+    @born = born
+    @name = name
+  end
+end
+
+def wrapped_string(dist)
+  "[#{dist.to_i}]"
+end
+
+def to_string(dist)
+  dist.to_i.to_s
+end
+
+def print_intro
+  puts 'Age of:'
+end
+
+=begin
+Calculate days between birth and now
+=end
+def days_since_birth(born, convf = method(:wrapped_string))
+  now = DateTime.now
+  born_date = now - Date.strptime(born, '%m-%d-%Y')
+
+  convf.call(born_date)
+end
+
+donald = Person.new('07-09-1934', 'Donald Duck')
+donald.born
+born = donald.born
+
+print_intro
+days = days_since_birth(born, method(:to_string))
+
+puts "#{donald.name} is #{days} days old"
diff --git a/tests/ruby_spec.lua b/tests/ruby_spec.lua
new file mode 100644
index 0000000..b9ea1f8
--- /dev/null
+++ b/tests/ruby_spec.lua
@@ -0,0 +1,60 @@
+describe("ruby", function()
+    local core = require("agrolens.core")
+    local buffers = nil
+    local eq = assert.equals
+
+    it("load", function()
+        vim.cmd.edit("tests/ruby/test.rb")
+        buffers = vim.api.nvim_list_bufs()
+        eq(#buffers, 1)
+
+        local content  = vim.api.nvim_buf_get_lines(buffers[1], 0, -1, false)
+
+        -- make sure buffer has content
+        eq(string.match(content[1], "frozen_string_literal"), "frozen_string_literal")
+
+        core.get_captures({ queries = { "functions" }, bufids = buffers })
+    end)
+
+    it("functions", function()
+        local entries = core.get_captures({ queries = { "functions" }, bufids = buffers })
+
+        eq(#entries, 6)
+        eq(entries[1].filename, "tests/ruby/test.rb")
+        eq(entries[1].lnum, 7)
+        eq(entries[1].col, 2)
+
+        eq(entries[1].line, "  attr_reader :born, :name")
+        eq(entries[2].line, "  def initialize(born, name)")
+        eq(entries[3].line, "def wrapped_string(dist)")
+        eq(entries[4].line, "def to_string(dist)")
+        eq(entries[5].line, "def print_intro")
+        eq(entries[6].line, "def days_since_birth(born, convf = method(:wrapped_string))")
+    end)
+
+    it("callings", function()
+        local entries = core.get_captures({ queries = { "callings" }, bufids = buffers })
+
+        eq(#entries, 14)
+        eq(entries[1].filename, "tests/ruby/test.rb")
+        eq(entries[1].lnum, 3)
+        eq(entries[1].col, 0)
+
+        eq(entries[1].line, "require 'date'")
+        eq(entries[2].line, "  attr_reader :born, :name")
+        eq(entries[3].line, '  "[#{dist.to_i}]"')
+    end)
+
+    it("comments", function()
+        local entries = core.get_captures({ queries = { "comments" }, bufids = buffers })
+
+        eq(#entries, 3)
+        eq(entries[1].filename, "tests/ruby/test.rb")
+        eq(entries[1].lnum, 1)
+        eq(entries[1].col, 0)
+
+        eq(entries[1].line, "# frozen_string_literal: true")
+        eq(entries[2].line, "# A person")
+        eq(entries[3].line, "=begin")
+    end)
+end)