fixup! more tests

Author: william-stacken

spec/unit/wasi_spec.rb

@@ -304,6 +304,26 @@ module Wasmtime
 
         expect(File.read(tempfile_path(File.join("tmp", "counter")))).to eq("0")
       end
+
+      it "does not accept an invalid host path" do
+        wasi_config = WasiConfig.new
+          .set_mapped_directory(tempfile_path("tmp"), "/tmp", :all, :all)
+
+        expect { run_fs.call(wasi_config) }.to raise_error do |error|
+          expect(error).to be_a(Wasmtime::Error)
+          expect(error.message).to match(/No such file or directory/)
+        end
+      end
+
+      it "does not accept invalid permissions" do
+        wasi_config = WasiConfig.new
+          .set_mapped_directory(tempfile_path("tmp"), "/tmp", :mutate, :invalid_permission)
+
+        expect { run_fs.call(wasi_config) }.to raise_error do |error|
+          expect(error).to be_a(Wasmtime::Error)
+          expect(error.message).to match(/Invalid file_perms: invalid_permission. Use one of :read, :write, or :all/)
+        end
+      end
     end
 
     describe "WasiConfig preview 1" do