add specs for library mapping helperslcg/dlopen-extension

1 files changed, 96 insertions, 0 deletions

diff --git a/spec/ffi_yajl/map_library_name_spec.rb b/spec/ffi_yajl/map_library_name_spec.rb
new file mode 100644
index 0000000..ed4f811
--- /dev/null
+++ b/spec/ffi_yajl/map_library_name_spec.rb
@@ -0,0 +1,96 @@
+
+require 'spec_helper'
+
+class Test
+  extend FFI_Yajl::MapLibraryName
+end
+
+host_os_library_name_mapping = {
+  "mingw"    => [ "libyajl.so", "yajl.dll" ],
+  "mswin"    => [ "libyajl.so", "yajl.dll" ],
+  "cygwin"   => [ "libyajl.so", "cygyajl.dll" ],
+  "darwin"   => [ "libyajl.bundle", "libyajl.dylib" ],
+  "solaris2" => [ "libyajl.so" ],
+  "linux"    => [ "libyajl.so" ],
+  "aix"      => [ "libyajl.so" ],
+  "hpux"     => [ "libyajl.so" ],
+  "netbsd"   => [ "libyajl.so" ],
+  "openbsd"  => [ "libyajl.so" ],
+  "freebsd"  => [ "libyajl.so" ],
+}
+
+describe "FFI_Yajl::MapLibraryName" do
+  let(:libyajl2_opt_path) { "/libyajl2/lib" }
+  before do
+    allow(Libyajl2).to receive(:opt_path).and_return(libyajl2_opt_path)
+  end
+
+  host_os_library_name_mapping.each do |host_os, library_names|
+
+    context "#library_names" do
+      it "maps #{host_os} correctly" do
+        allow(Test).to receive(:host_os).and_return(host_os)
+        expect(Test.send(:library_names)).to eq(library_names)
+      end
+    end
+
+    context "#expanded_library_names" do
+      it "maps #{host_os} correctly" do
+        allow(Test).to receive(:host_os).and_return(host_os)
+        expanded_library_names = []
+        library_names.each do |library_name|
+          path = File.expand_path(File.join(libyajl2_opt_path, library_name))
+          expanded_library_names.push(path)
+          expect(File).to receive(:file?).with(path).and_return(true)
+        end
+        expect(Test.send(:expanded_library_names)).to eq(expanded_library_names)
+      end
+    end
+
+    context "#dlopen_yajl_library" do
+      it "should call dlopen against an expanded library name if it finds it on #{host_os}" do
+        allow(Test).to receive(:host_os).and_return(host_os)
+        library_names.each do |library_name|
+          path = File.expand_path(File.join(libyajl2_opt_path, library_name))
+          allow(File).to receive(:file?).with(path).and_return(true)
+          allow(Test).to receive(:dlopen).with(path).and_return(nil)
+        end
+        Test.send(:dlopen_yajl_library)
+      end
+      it "if dlopen calls all raise it should still use the short names on #{host_os}" do
+        allow(Test).to receive(:host_os).and_return(host_os)
+        library_names.each do |library_name|
+          path = File.expand_path(File.join(libyajl2_opt_path, library_name))
+          allow(File).to receive(:file?).with(path).and_return(true)
+          allow(Test).to receive(:dlopen).with(path).and_raise(ArgumentError)
+        end
+        allow(Test).to receive(:dlopen).with(library_names.first).and_return(nil)
+        Test.send(:dlopen_yajl_library)
+      end
+    end
+
+    context "ffi_open_yajl_library" do
+      it "should call ffi_lib against an expanded library name if it finds it on #{host_os}" do
+        allow(Test).to receive(:host_os).and_return(host_os)
+        library_names.each do |library_name|
+          path = File.expand_path(File.join(libyajl2_opt_path, library_name))
+          allow(File).to receive(:file?).with(path).and_return(true)
+          allow(Test).to receive(:ffi_lib).with(path).and_return(nil)
+        end
+        Test.send(:ffi_open_yajl_library)
+      end
+
+      it "if dlopen calls all raise it should still use 'yajl' on #{host_os}" do
+        allow(Test).to receive(:host_os).and_return(host_os)
+        library_names.each do |library_name|
+          path = File.expand_path(File.join(libyajl2_opt_path, library_name))
+          allow(File).to receive(:file?).with(path).and_return(true)
+          allow(Test).to receive(:ffi_lib).with(path).and_raise(LoadError)
+        end
+        allow(Test).to receive(:ffi_lib).with('yajl').and_return(nil)
+        Test.send(:ffi_open_yajl_library)
+      end
+    end
+
+  end
+end