diff --git a/spec/utils_spec.lua b/spec/utils_spec.lua
new file mode 100644
index 0000000..acfadb9
--- /dev/null
+++ b/spec/utils_spec.lua
@@ -0,0 +1,39 @@
+local utils = require "largparse.utils"
+
+describe("tests related to utils.parse_boundaries", function()
+   it("handles * correctly", function()
+      local min, max = utils.parse_boundaries("*")
+      assert.equal(min, 0)
+      assert.equal(max, math.huge)
+   end)
+
+   it("handles + correctly", function()
+      local min, max = utils.parse_boundaries("+")
+      assert.equal(min, 1)
+      assert.equal(max, math.huge)
+   end)
+
+   it("handles ? correctly", function()
+      local min, max = utils.parse_boundaries("?")
+      assert.equal(min, 0)
+      assert.equal(max, 1)
+   end)
+
+   it("handles numbers correctly", function()
+      local min, max = utils.parse_boundaries(42)
+      assert.equal(min, 42)
+      assert.equal(max, 42)
+   end)
+
+   it("handles numbers+ correctly", function()
+      local min, max = utils.parse_boundaries("42+")
+      assert.equal(min, 42)
+      assert.equal(max, math.huge)
+   end)
+
+   it("handles ranges correctly", function()
+      local min, max = utils.parse_boundaries("42-96")
+      assert.equal(min, 42)
+      assert.equal(max, 96)
+   end)
+end)
\ No newline at end of file