Add basic tests

lib/gemini.ex

@@ -60,6 +60,9 @@ defmodule Gemini do
 
   @spec parse(String.t()) :: [line()]
 
+  @doc """
+  Parses a `text/gemini` document into its lines.
+  """
   def parse(doc) do
     {lines, _} =
       doc
@@ -73,7 +76,7 @@ defmodule Gemini do
 
           preformatting_toggle && !in_preformatting ->
             "```" <> alt = line
-            alt = if length(alt) == 0, do: nil, else: alt
+            alt = if alt == "", do: nil, else: alt
             {[{:preformatting_start, alt} | lines], true}
 
           in_preformatting ->

lib/gemini/response.ex

@@ -43,12 +43,19 @@ defmodule Gemini.Response do
   defp parse_meta(data, acc \\ [], length \\ 0)
 
   defp parse_meta(<<"\r\n", rest::binary>>, acc, _length) do
+    body =
+      if rest == "" do
+        nil
+      else
+        rest
+      end
+
     {
       :ok,
       acc
       |> Enum.reverse()
       |> :erlang.list_to_binary(),
-      rest
+      body
     }
   end
 

test/gemini/response_test.exs

@@ -0,0 +1,14 @@
+defmodule Gemini.ResponseTest do
+  use ExUnit.Case
+  alias Gemini.Response
+  doctest Response
+
+  test "parses a response with a body" do
+    assert Response.parse("20 text/gemini\r\nsome body") ==
+             {:ok, %Response{status: 20, meta: "text/gemini", body: "some body"}}
+  end
+
+  test "parses a response without a body" do
+    assert Response.parse("31 /foo\r\n") == {:ok, %Response{status: 31, meta: "/foo", body: nil}}
+  end
+end

test/gemini_test.exs

@@ -2,7 +2,56 @@ defmodule GeminiTest do
   use ExUnit.Case
   doctest Gemini
 
-  test "greets the world" do
-    assert Gemini.hello() == :world
+  test "parse text lines" do
+    assert Gemini.parse("test") == [{:text, "test"}]
+  end
+
+  test "parse link lines" do
+    assert Gemini.parse("=>gemini://example.com") == [
+             {:link, URI.parse("gemini://example.com"), nil}
+           ]
+
+    assert Gemini.parse("=>  \t  gemini://example.com") == [
+             {:link, URI.parse("gemini://example.com"), nil}
+           ]
+
+    assert Gemini.parse("=>gemini://example.com some text") == [
+             {:link, URI.parse("gemini://example.com"), "some text"}
+           ]
+
+    assert Gemini.parse("=>  \t  gemini://example.com \t\t\tother text") == [
+             {:link, URI.parse("gemini://example.com"), "other text"}
+           ]
+  end
+
+  test "parse preformatted block" do
+    assert Gemini.parse("```foo\nbar\n```") == [
+             {:preformatting_start, "foo"},
+             {:preformatted, "bar"},
+             :preformatting_end
+           ]
+
+    assert Gemini.parse("```foo\nbar\n```baz") == [
+             {:preformatting_start, "foo"},
+             {:preformatted, "bar"},
+             :preformatting_end
+           ]
+  end
+
+  test "parse headings" do
+    assert Gemini.parse("#one") == [{:heading, "one", 1}]
+    assert Gemini.parse("# one") == [{:heading, "one", 1}]
+    assert Gemini.parse("## two") == [{:heading, "two", 2}]
+    assert Gemini.parse("### three") == [{:heading, "three", 3}]
+  end
+
+  test "parse list items" do
+    assert Gemini.parse("* one") == [{:list_item, "one"}]
+    assert Gemini.parse("*one") == [{:text, "*one"}]
+  end
+
+  test "parse block quotes" do
+    assert Gemini.parse(">quoted") == [{:quoted, "quoted"}]
+    assert Gemini.parse(">  \t quoted") == [{:quoted, "quoted"}]
   end
 end