use full file path (with DLEXT)

Author: jethrodaniel

lib/sqlite_extensions/uuid.rb

@@ -1,10 +1,13 @@
 # frozen_string_literal: true
 
+require "rbconfig"
+
 module SqliteExtensions
   module UUID
     def self.to_path
       spec = Gem.loaded_specs["sqlite_extensions-uuid"]
-      File.join(spec.require_path, "sqlite_extensions/uuid/uuid")
+      path = File.join(spec.require_path, "sqlite_extensions/uuid/uuid")
+      path + "." + RbConfig::CONFIG.fetch("DLEXT")
     end
   end
 end

spec/sqlite_extensions/uuid_spec.rb

@@ -6,15 +6,36 @@
   end
 
   describe "#to_path" do
+    subject { described_class.to_path }
+
     before do
       gemspec = instance_double(Gem::Specification, require_path: "foo")
       allow(Gem).to receive(:loaded_specs).and_return("sqlite_extensions-uuid" => gemspec)
+      allow(RbConfig::CONFIG).to receive(:fetch).with("DLEXT").and_return("so")
+    end
+
+    context "when linux" do
+      before do
+        allow(RbConfig::CONFIG).to receive(:fetch).with("DLEXT").and_return("so")
+      end
+
+      it { is_expected.to eq "foo/sqlite_extensions/uuid/uuid.so" }
+    end
+
+    context "when mac with .dylib extension" do
+      before do
+        allow(RbConfig::CONFIG).to receive(:fetch).with("DLEXT").and_return("dylib")
+      end
+
+      it { is_expected.to eq "foo/sqlite_extensions/uuid/uuid.dylib" }
     end
 
-    it "returns the path to the compiled extension" do
-      path = described_class.to_path
+    context "when mac with .bundle extension" do
+      before do
+        allow(RbConfig::CONFIG).to receive(:fetch).with("DLEXT").and_return("bundle")
+      end
 
-      expect(path).to eq "foo/sqlite_extensions/uuid/uuid"
+      it { is_expected.to eq "foo/sqlite_extensions/uuid/uuid.bundle" }
     end
   end