[Arc] Add a test for ToS hash calculation.

Bug: 781765,856583
Change-Id: Ia7feaf1119cc1f2f402646e66c832f656ca55e35
Reviewed-on: https://chromium-review.googlesource.com/1114612Reviewed-by: Elijah Taylor <elijahtaylor@chromium.org>
Commit-Queue: vitaliii <vitaliii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#571859}

chrome/browser/chromeos/arc/arc_support_host_unittest.cc

@@ -270,4 +270,19 @@ TEST_F(ArcSupportHostTest, SendFeedbackOnError) {
   fake_arc_support()->ClickSendFeedbackButton();
 }
 
+TEST_F(ArcSupportHostTest, CalculateToSHashInRightOrder) {
+  std::vector<int> output = ArcSupportHost::ComputePlayToSConsentIds(
+      "The quick brown fox jumps over the lazy dog");
+  // Expect length and 5 ints for the hash.
+  EXPECT_EQ(6, static_cast<int>(output.size()));
+  // Check string length.
+  EXPECT_EQ(43, output[0]);
+  // Verify the hash: 2fd4e1c6 7a2d28fc ed849ee1 bb76e739 1b93eb12.
+  EXPECT_EQ(static_cast<int>(0x2fd4e1c6), output[1]);
+  EXPECT_EQ(static_cast<int>(0x7a2d28fc), output[2]);
+  EXPECT_EQ(static_cast<int>(0xed849ee1), output[3]);
+  EXPECT_EQ(static_cast<int>(0xbb76e739), output[4]);
+  EXPECT_EQ(static_cast<int>(0x1b93eb12), output[5]);
+}
+
 }  // namespace