Test BlockCommand

spec/block_command_spec.rb

@@ -0,0 +1,63 @@
+RSpec.describe Pry::BlockCommand do
+  subject { Class.new(described_class).new }
+
+  describe "#call" do
+    context "when #process accepts no arguments" do
+      let(:block) do
+        def process; end
+        method(:process)
+      end
+
+      before { subject.class.block = block }
+
+      it "calls the block despite passed arguments" do
+        expect { subject.call(1, 2) }.not_to raise_error
+      end
+    end
+
+    context "when #process accepts some arguments" do
+      let(:block) do
+        def process(arg, other); end
+        method(:process)
+      end
+
+      before { subject.class.block = block }
+
+      it "calls the block even if there's not enough arguments" do
+        expect { subject.call(1) }.not_to raise_error
+      end
+
+      it "calls the block even if there are more arguments than needed" do
+        expect { subject.call(1, 2, 3) }.not_to raise_error
+      end
+    end
+
+    context "when passed a variable-length array" do
+      let(:block) do
+        def process(*args); end
+        method(:process)
+      end
+
+      before { subject.class.block = block }
+
+      it "calls the block without arguments" do
+        expect { subject.call }.not_to raise_error
+      end
+
+      it "calls the block with some arguments" do
+        expect { subject.call(1, 2, 3) }.not_to raise_error
+      end
+    end
+  end
+
+  describe "#help" do
+    before do
+      subject.class.description = 'desc'
+      subject.class.command_options(listing: 'listing')
+    end
+
+    it "returns help output" do
+      expect(subject.help).to eq('listing            desc')
+    end
+  end
+end