add auth realm test

spec/http_auth_realm_spec.cr

@@ -0,0 +1,48 @@
+require "./spec_helper"
+
+describe "Mechanize AuthRealm test" do
+  it "test_initialize" do
+    uri = URI.parse("http://example.com")
+    realm = Mechanize::HTTP::AuthRealm.new "Digest", uri, "r"
+    realm.realm.should eq "r"
+
+    realm = Mechanize::HTTP::AuthRealm.new "Digest", uri, "R"
+    realm.realm.should_not eq "r"
+    realm.realm.should eq "R"
+
+    realm = Mechanize::HTTP::AuthRealm.new "Digest", uri, nil
+    realm.realm.should eq nil
+  end
+
+  it "test_equals2" do
+    uri = URI.parse("http://example.com")
+    realm = Mechanize::HTTP::AuthRealm.new "Digest", uri, "r"
+    other = realm.dup
+    realm.should eq other
+
+    other = Mechanize::HTTP::AuthRealm.new "Basic", uri, "r"
+    realm.should_not eq other
+
+    other = Mechanize::HTTP::AuthRealm.new "Digest", URI.parse("http://other.example/"), "r"
+    realm.should_not eq other
+
+    other = Mechanize::HTTP::AuthRealm.new "Digest", uri, "R"
+    realm.should_not eq other
+
+    other = Mechanize::HTTP::AuthRealm.new "Digest", uri, "s"
+    realm.should_not eq other
+  end
+
+  it "test_hash" do
+    uri = URI.parse("http://example.com")
+    realm = Mechanize::HTTP::AuthRealm.new "Digest", uri, "r"
+    h = Hash(Mechanize::HTTP::AuthRealm, Int32).new(0)
+    h[realm] = 1
+
+    other = realm.dup
+    h[other].should eq 1
+
+    other = Mechanize::HTTP::AuthRealm.new "Basic", uri, "r"
+    h[other].should eq 0
+  end
+end