spec/sets_spec.rb in fakeredis-0.4.2 vs spec/sets_spec.rb in fakeredis-0.4.3

@@ -11,10 +11,17 @@
       @client.sadd("key", "value").should be == false
 
       @client.smembers("key").should be == ["value"]
     end
 
+    it "should raise error if command arguments count is not enough" do
+      expect { @client.sadd("key", []) }.to raise_error(Redis::CommandError, "ERR wrong number of arguments for 'sadd' command")
+      expect { @client.sinter(*[]) }.to raise_error(Redis::CommandError, "ERR wrong number of arguments for 'sinter' command")
+
+      @client.smembers("key").should be_empty
+    end
+
     it "should add multiple members to a set" do
       @client.sadd("key", %w(value other something more)).should be == 4
       @client.sadd("key", %w(and additional values)).should be == 3
       @client.smembers("key").should =~ ["value", "other", "something", "more", "and", "additional", "values"]
     end
@@ -35,9 +42,16 @@
       @client.sadd("key3", "a")
       @client.sadd("key3", "c")
       @client.sadd("key3", "e")
 
       @client.sdiff("key1", "key2", "key3").should =~ ["b", "d"]
+    end
+
+    it "should subtract from a nonexistent set" do
+      @client.sadd("key2", "a")
+      @client.sadd("key2", "b")
+
+      @client.sdiff("key1", "key2").should == []
     end
 
     it "should subtract multiple sets and store the resulting set in a key" do
       @client.sadd("key1", "a")
       @client.sadd("key1", "b")