1 files changed, 64 insertions, 0 deletions
diff --git a/test/prism/ruby_api_test.rb b/test/prism/ruby_api_test.rb
new file mode 100644
index 0000000000..dc12012f44
--- /dev/null
+++ b/test/prism/ruby_api_test.rb
@@ -0,0 +1,64 @@
+# frozen_string_literal: true
+
+require_relative "test_helper"
+
+module YARP
+  class RubyAPITest < TestCase
+    def test_ruby_api
+      filepath = __FILE__
+      source = File.read(filepath, binmode: true, external_encoding: Encoding::UTF_8)
+
+      assert_equal YARP.lex(source, filepath).value, YARP.lex_file(filepath).value
+      assert_equal YARP.dump(source, filepath), YARP.dump_file(filepath)
+
+      serialized = YARP.dump(source, filepath)
+      ast1 = YARP.load(source, serialized).value
+      ast2 = YARP.parse(source, filepath).value
+      ast3 = YARP.parse_file(filepath).value
+
+      assert_equal_nodes ast1, ast2
+      assert_equal_nodes ast2, ast3
+    end
+
+    def test_literal_value_method
+      assert_equal 123, parse_expression("123").value
+      assert_equal 3.14, parse_expression("3.14").value
+      assert_equal 42i, parse_expression("42i").value
+      assert_equal 42.1ri, parse_expression("42.1ri").value
+      assert_equal 3.14i, parse_expression("3.14i").value
+      assert_equal 42r, parse_expression("42r").value
+      assert_equal 0.5r, parse_expression("0.5r").value
+      assert_equal 42ri, parse_expression("42ri").value
+      assert_equal 0.5ri, parse_expression("0.5ri").value
+    end
+
+    def test_location_join
+      recv, args_node, _ = parse_expression("1234 + 567").child_nodes
+      arg = args_node.arguments[0]
+
+      joined = recv.location.join(arg.location)
+      assert_equal 0, joined.start_offset
+      assert_equal 10, joined.length
+
+      assert_raise RuntimeError, "Incompatible locations" do
+        arg.location.join(recv.location)
+      end
+
+      other_arg = parse_expression("1234 + 567").arguments.arguments[0]
+
+      assert_raise RuntimeError, "Incompatible sources" do
+        other_arg.location.join(recv.location)
+      end
+
+      assert_raise RuntimeError, "Incompatible sources" do
+        recv.location.join(other_arg.location)
+      end
+    end
+
+    private
+
+    def parse_expression(source)
+      YARP.parse(source).value.statements.body.first
+    end
+  end
+end