1 files changed, 79 insertions, 0 deletions
diff --git a/test/cepis_test.exs b/test/cepis_test.exs
new file mode 100644
index 0000000..a6bedb1
--- /dev/null
+++ b/test/cepis_test.exs
@@ -0,0 +1,79 @@
+defmodule CepisTest do
+  use ExUnit.Case, async: true
+
+  doctest Cepis
+  doctest Cepis.Client
+
+  describe "normalize_cep/1" do
+    test "accepts the mask and the bare digits" do
+      for value <- ["01001000", "01001-000", " 01001-000 ", "01001.000"] do
+        assert Cepis.normalize_cep(value) == {:ok, "01001000"}
+      end
+    end
+
+    test "rejects anything that is not 8 digits" do
+      for value <- ["", "123", "0100100a", "010010000", "abcdefgh"] do
+        assert {:error, %Cepis.InvalidCEPError{}} = Cepis.normalize_cep(value)
+      end
+    end
+
+    test "rejects a value that is not a string" do
+      assert {:error, %Cepis.InvalidCEPError{}} = Cepis.normalize_cep(1_001_000)
+    end
+
+    test "the bang variant raises" do
+      assert_raise Cepis.InvalidCEPError, fn -> Cepis.normalize_cep!("123") end
+    end
+  end
+
+  describe "Cepis.Client.new/1" do
+    test "strips a trailing slash so separators cannot double up" do
+      assert Cepis.Client.new(base_url: "http://x/").base_url == "http://x"
+      assert Cepis.Client.new(base_url: "http://x//").base_url == "http://x"
+    end
+
+    test "rejects an impossible configuration" do
+      assert_raise ArgumentError, fn -> Cepis.Client.new(max_attempts: 0) end
+      assert_raise ArgumentError, fn -> Cepis.Client.new(timeout: 0) end
+    end
+
+    test "rejects an unknown option" do
+      assert_raise KeyError, fn -> Cepis.Client.new(retries: 3) end
+    end
+
+    test "the default user agent identifies the library" do
+      assert Cepis.Client.new([]).user_agent =~ "cepis-elixir/"
+    end
+
+    test "an already built client passes through untouched" do
+      client = Cepis.Client.new(base_url: "http://x")
+      assert Cepis.Client.new(client) == client
+    end
+  end
+
+  describe "Cepis.Error" do
+    test "splits retriable transport failures from definitive answers" do
+      assert Cepis.Error.retriable?(%Cepis.ServerError{status: 500})
+      assert Cepis.Error.retriable?(%Cepis.RateLimitError{})
+      assert Cepis.Error.retriable?(%Cepis.NetworkError{})
+      refute Cepis.Error.retriable?(%Cepis.NotFoundError{})
+      refute Cepis.Error.retriable?(%Cepis.InvalidCEPError{})
+    end
+
+    test "recognises its own errors" do
+      assert Cepis.Error.error?(%Cepis.NotFoundError{})
+      refute Cepis.Error.error?(%RuntimeError{})
+      refute Cepis.Error.error?(:oops)
+    end
+  end
+
+  describe "Cepis.Address.formatted_cep/1" do
+    test "adds the mask" do
+      assert Cepis.Address.formatted_cep(%Cepis.Address{cep: "01001000"}) == "01001-000"
+    end
+
+    test "leaves an unexpected value alone" do
+      assert Cepis.Address.formatted_cep(%Cepis.Address{cep: ""}) == ""
+    end
+  end
+end