config: factor out exception_handler hook to a separate classexception-handler-refactoring

1 files changed, 64 insertions, 0 deletions

diff --git a/spec/exception_handler_spec.rb b/spec/exception_handler_spec.rb
new file mode 100644
index 00000000..62138153
--- /dev/null
+++ b/spec/exception_handler_spec.rb
@@ -0,0 +1,64 @@
+RSpec.describe Pry::ExceptionHandler do
+  describe ".handle_exception" do
+    let(:output) { StringIO.new }
+    let(:pry_instance) { Pry.new }
+
+    context "when exception is a UserError and a SyntaxError" do
+      let(:exception) do
+        SyntaxError.new('cool syntax error, dude').extend(Pry::UserError)
+      end
+
+      it "prints the syntax error with customized message" do
+        described_class.handle_exception(output, exception, pry_instance)
+        expect(output.string).to start_with("SyntaxError: dude\n")
+      end
+    end
+
+    context "when exception is a standard error" do
+      let(:exception) do
+        error = StandardError.new('oops')
+        error.set_backtrace(["/bin/pry:23:in `<main>'"])
+        error
+      end
+
+      it "prints standard error message" do
+        described_class.handle_exception(output, exception, pry_instance)
+        expect(output.string)
+          .to eq("StandardError: oops\nfrom /bin/pry:23:in `<main>'\n")
+      end
+    end
+
+    context "when exception is a nested standard error" do
+      let(:exception) do
+        error = nil
+        begin
+          begin
+            raise 'nested oops'
+          rescue # rubocop:disable Style/RescueStandardError
+            raise 'outer oops'
+          end
+        rescue StandardError => outer_error
+          error = outer_error
+        end
+
+        error
+      end
+
+      before do
+        if RUBY_VERSION.start_with?('1.9', '2.0')
+          skip("Ruby #{RUBY_VERSION} doesn't support nested exceptions")
+        end
+      end
+
+      it "prints standard error message" do
+        described_class.handle_exception(output, exception, pry_instance)
+        expect(output.string).to match(
+          /RuntimeError:\souter\soops\n
+           from\s.+\n
+           Caused\sby\sRuntimeError:\snested\soops\n
+           from.+/x
+        )
+      end
+    end
+  end
+end