change assert_tag and assert_no_tag to assert_have_tag and assert_no_tag so it won't conflict with rails and so that it will be more like the matchers.

lib/webrat/core/matchers/have_tag.rb

@@ -55,14 +55,14 @@ module Webrat
     
     # Asserts that the body of the response contains
     # the supplied tag with the associated selectors
-    def assert_tag(name, attributes = {})
+    def assert_have_tag(name, attributes = {})
       ht = HaveTag.new([name, attributes])
       raise Test::Unit::AssertionFailedError.new(ht.failure_message) unless ht.matches?(response_body)
     end
     
     # Asserts that the body of the response
     # does not contain the supplied string or regepx
-    def assert_no_tag(name, attributes = {})
+    def assert_have_no_tag(name, attributes = {})
       ht = HaveTag.new([name, attributes])
       raise Test::Unit::AssertionFailedError.new(ht.negative_failure_message) if ht.matches?(response_body)
     end

spec/public/matchers_spec.rb

@@ -192,40 +192,40 @@ describe Webrat::Matchers do
         should_receive(:response_body).and_return @body
         require 'test/unit'
       end
-      describe "assert_tag" do
+      describe "assert_have_tag" do
         it "should pass when body contains the tag" do
-          assert_tag("div")
+          assert_have_tag("div")
         end
         
         it "should pass when finding with additional selectors" do
-          assert_tag("div", :class => "inner")
+          assert_have_tag("div", :class => "inner")
         end
         
         
         it "should throw an exception when the body doesnt have matching tag" do
-          lambda {assert_tag("p")}.should raise_error(Test::Unit::AssertionFailedError)
+          lambda {assert_have_tag("p")}.should raise_error(Test::Unit::AssertionFailedError)
         end
         
         it "should throw an exception when the body doens't have a tag matching the additional selector" do
-          lambda {assert_tag("div", :class => "nope")}.should raise_error(Test::Unit::AssertionFailedError)
+          lambda {assert_have_tag("div", :class => "nope")}.should raise_error(Test::Unit::AssertionFailedError)
         end
       end
       
-      describe "assert_no_tag" do
+      describe "assert_have_no_tag" do
         it "should pass when the body doesn't contan the tag" do
-          assert_no_tag("p")
+          assert_have_no_tag("p")
         end
         
         it "should pass when the body doesn't contain the tag due to additional selectors missing" do
-          assert_no_tag("div", :class => "nope")
+          assert_have_no_tag("div", :class => "nope")
         end
         
         it "should throw an exception when the body does contain the tag" do
-          lambda {assert_no_tag("div")}.should raise_error(Test::Unit::AssertionFailedError)
+          lambda {assert_have_no_tag("div")}.should raise_error(Test::Unit::AssertionFailedError)
         end
         
         it "should throw an exception when the body contains the tag with additional selectors" do
-          lambda {assert_no_tag("div", :class => "inner")}.should raise_error(Test::Unit::AssertionFailedError)
+          lambda {assert_have_no_tag("div", :class => "inner")}.should raise_error(Test::Unit::AssertionFailedError)
         end
       end
     end