Provide the equivalent of GURL::DomainIs for url::Origin.

url/origin_unittest.cc

Index: url/origin_unittest.cc
diff --git a/url/origin_unittest.cc b/url/origin_unittest.cc
index 74ffd3038db974d9d944c0bdd93e9525f2735dd1..416e0e35ee56b5a23159c6731dc01fb46f2664ec 100644
--- a/url/origin_unittest.cc
+++ b/url/origin_unittest.cc
@@ -252,4 +252,61 @@ TEST(OriginTest, UnsafelyCreateUniqueViaEmbeddedNulls) {
   }
 }
 
+TEST(OriginTest, DomainIs) {
+  const struct {
+    const char* url;
+    const char* lower_ascii_domain;
+    bool expected_domain_is;
+  } kTestCases[] = {
+      {"http://google.com/foo", "google.com", true},
+      {"http://www.google.com:99/foo", "google.com", true},
+      {"http://www.google.com.cn/foo", "google.com", false},
+      {"http://www.google.comm", "google.com", false},
+      {"http://www.iamnotgoogle.com/foo", "google.com", false},
+      {"http://www.google.com/foo", "Google.com", false},
+
+      // If the host ends with a dot, it matches domains with or without a dot.
+      {"http://www.google.com./foo", "google.com", true},
+      {"http://www.google.com./foo", "google.com.", true},
+      {"http://www.google.com./foo", ".com", true},
+      {"http://www.google.com./foo", ".com.", true},
+
+      // But, if the host doesn't end with a dot and the input domain does, then
+      // it's considered to not match.
+      {"http://google.com/foo", "google.com.", false},
+
+      // If the host ends with two dots, it doesn't match.
+      {"http://www.google.com../foo", "google.com", false},
+
+      // Filesystem scheme.
+      {"filesystem:http://www.google.com:99/foo/", "google.com", true},
+      {"filesystem:http://www.iamnotgoogle.com/foo/", "google.com", false},
+
+      // File scheme.
+      {"file:///home/user/text.txt", "", false},
+      {"file:///home/user/text.txt", "txt", false},
+  };
+
+  for (const auto& test_case : kTestCases) {
+    SCOPED_TRACE(testing::Message() << "(url, domain): (" << test_case.url
+                                    << ", " << test_case.lower_ascii_domain
+                                    << ")");
+    GURL url(test_case.url);
+    ASSERT_TRUE(url.is_valid());
+    url::Origin origin(url);
+
+    EXPECT_EQ(test_case.expected_domain_is,
+              origin.DomainIs(test_case.lower_ascii_domain));
+  }
+
+  // If the URL is invalid, DomainIs returns false.
+  GURL invalid_url("google.com");
+  ASSERT_FALSE(invalid_url.is_valid());
+  EXPECT_FALSE(url::Origin(invalid_url).DomainIs("google.com"));
+
+  // Unique origins.
+  EXPECT_FALSE(url::Origin().DomainIs(""));
+  EXPECT_FALSE(url::Origin().DomainIs("com"));
+}
+
 }  // namespace url