json_ld: helpers for the JSON-LD test suite

test/support/test_data.ex

@@ -0,0 +1,14 @@
+defmodule JSON.LD.TestData do
+
+  @dir Path.join(File.cwd!, "test/data/")
+  def dir, do: @dir
+
+  def file(name) do
+    if File.exists?(path = Path.join(@dir, name)) do
+      path
+    else
+      raise "Test data file '#{name}' not found"
+    end
+  end
+
+end

test/support/test_suite.ex

@@ -0,0 +1,55 @@
+defmodule JSON.LD.TestSuite do
+
+  @test_suite_dir "json-ld.org-test-suite"
+  def test_suite_dir, do: @test_suite_dir
+
+  def file(name), do: JSON.LD.TestData.file(Path.join(@test_suite_dir, name))
+
+  def parse_json_file!(file) do
+    case File.read(file(file)) do
+      {:ok,   content} -> Poison.Parser.parse!(content)
+      {:error, reason} -> raise File.Error, path: file, action: "read", reason: reason
+    end
+  end
+
+  def j(file), do: parse_json_file!(file)
+
+  def manifest_filename(type), do: "#{to_string(type)}-manifest.jsonld"
+
+  def manifest(type) do
+    type
+    |> manifest_filename
+    |> parse_json_file!
+  end
+
+  def test_cases(type), do: manifest(type)["sequence"]
+
+  def test_cases_by_type(test_cases) do
+    Enum.group_by(test_cases, fn %{"@type" => type} ->
+      cond do
+        "jld:PositiveEvaluationTest" in type -> :positive_evaluation_test
+        "jld:NegativeEvaluationTest" in type -> :negative_evaluation_test
+        "jld:PositiveSyntaxTest"     in type -> :positive_syntax_test
+        "jld:NegativeSyntaxTest"     in type -> :negative_syntax_test
+      end
+    end)
+  end
+
+  def test_case_options(test_case, %{"baseIri" => base_iri}),
+    do: test_case_options(test_case, base_iri)
+
+  def test_case_options(test_case, base_iri) do
+    test_case
+    |> Map.get("option", %{})
+    |> Map.put_new("base", base_iri <> test_case["input"])
+    |> Enum.map(fn {key, value} ->
+        {key |> Macro.underscore |> String.to_atom, value}
+       end)
+    |> Enum.map(fn
+        {:expand_context, file} -> {:expand_context, j(file)}
+        option -> option
+       end)
+    |> JSON.LD.Options.new
+  end
+
+end

test/test_helper.exs

@@ -1 +1,7 @@
 ExUnit.start()
+
+with files = File.ls!("./test/support") do
+  Enum.each files, fn(file) ->
+    Code.require_file "support/#{file}", __DIR__
+  end
+end