[Autofill/Autocomplete Feature] Substring matching instead of prefix matching.

components/autofill/core/common/autofill_util_unittest.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/autofill/core/common/autofill_util.h"
+
+#include "base/command_line.h"
+#include "base/strings/utf_string_conversions.h"
+#include "components/autofill/core/common/autofill_switches.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace autofill {
+
+// Tests for ContainsTokenThatStartsWith().
+TEST(AutofillUtilTest, ContainsTokenThatStartsWith) {
+  // ContainsTokenThatStartsWith should not work yet without a flag.
+  EXPECT_FALSE(ContainsTokenThatStartsWith(base::ASCIIToUTF16("ab@cd.b"),
+                                           base::ASCIIToUTF16("a"), false));
+
+  // Token matching is currently behind a flag.
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
+      autofill::switches::kEnableSuggestionsWithSubstringMatch);
+
+  const struct {
+    const char* const field_suggestion;
+    const char* const field_contents;
+    bool case_sensitive;
+    bool expected_result;
+  } test_cases[] = {
+      {"ab@cd.b", "a",  false, true},
+      {"ab@cd.b", "b",  false, true},
+      {"ab@cd.b", "Ab", false, true},
+      {"ab@cd.b", "Ab", true,  false},
+      {"ab@cd.b", "cd", true,  true},
+      {"ab@cd.b", "d",  false, false},
+      {"ab@cd.b", "b@", true,  false},
+      {"ab@cd.b", "ab", false, true},
+      {"",        "ab", false, false},
+      {"",        "ab", true,  false},
+      {"ab",      "",   false, true},
+      {"ab",      "",   true,  true},
+  };
+
+  for (size_t i = 0; i < arraysize(test_cases); ++i) {
+    SCOPED_TRACE(testing::Message()
+                 << "suggestion = " << test_cases[i].field_suggestion
+                 << ", contents = " << test_cases[i].field_contents);
+
+    EXPECT_EQ(test_cases[i].expected_result,
+              ContainsTokenThatStartsWith(
+                  base::ASCIIToUTF16(test_cases[i].field_suggestion),
+                  base::ASCIIToUTF16(test_cases[i].field_contents),
+                  test_cases[i].case_sensitive));
+  }
+}
+
+// Tests for GetTextSelectionStart().
+TEST(AutofillUtilTest, GetTextSelectionStart) {
+  const struct {
+    const char* const field_suggestion;
+    const char* const field_contents;
+    size_t expected_start;
+  } test_cases[] = {
+      {"ab@cd.b",              "a",       1},
+      {"ab@cd.b",              "Ab",      2},
+      {"ab@cd.b",              "cd",      5},
+      {"ab@cd.b",              "ab@c",    4},
+      {"ab@cd.b",              "cd.b",    7},
+      {"ab@cd.b",              "b",       7},
+      {"ba.a.ab",              "a.a",     6},
+      {"texample@example.com", "example", 16},
+  };
+
+  for (size_t i = 0; i < arraysize(test_cases); ++i) {
+    SCOPED_TRACE(testing::Message()
+                 << "suggestion = " << test_cases[i].field_suggestion
+                 << ", contents = " << test_cases[i].field_contents);
+
+    EXPECT_EQ(test_cases[i].expected_start,
+              GetTextSelectionStart(
+                  base::ASCIIToUTF16(test_cases[i].field_suggestion),
+                  base::ASCIIToUTF16(test_cases[i].field_contents)));
+  }
+}
+
+}  // autofill