Move state machines to state_machines subdir

third_party/WebKit/Source/core/editing/BackspaceStateMachineTest.cpp

 // Copyright 2016 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 "core/editing/BackspaceStateMachine.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
+constexpr BackspaceStateMachine::State NeedMoreCodeUnit = BackspaceStateMachine::State::NeedMoreCodeUnit;
+constexpr BackspaceStateMachine::State Finished = BackspaceStateMachine::State::Finished;
+
 TEST(BackspaceStateMachineTest, DoNothingCase)
 {
     BackspaceStateMachine machine;
-    EXPECT_EQ(0, machine.finalizeAndGetCodeUnitCountToBeDeleted());
-    EXPECT_EQ(0, machine.finalizeAndGetCodeUnitCountToBeDeleted());
+    EXPECT_EQ(0, machine.finalizeAndGetBoundaryOffset());
+    EXPECT_EQ(0, machine.finalizeAndGetBoundaryOffset());
 }
 
 TEST(BackspaceStateMachineTest, SingleCharacter)
 {
     BackspaceStateMachine machine;
-    EXPECT_TRUE(machine.updateState('a'));
-    EXPECT_EQ(1, machine.finalizeAndGetCodeUnitCountToBeDeleted());
-    EXPECT_EQ(1, machine.finalizeAndGetCodeUnitCountToBeDeleted());
+    EXPECT_EQ(Finished, machine.feedPrecedingCodeUnit('a'));
+    EXPECT_EQ(-1, machine.finalizeAndGetBoundaryOffset());
+    EXPECT_EQ(-1, machine.finalizeAndGetBoundaryOffset());
 
     machine.reset();
-    EXPECT_TRUE(machine.updateState('-'));
-    EXPECT_EQ(1, machine.finalizeAndGetCodeUnitCountToBeDeleted());
-    EXPECT_EQ(1, machine.finalizeAndGetCodeUnitCountToBeDeleted());
+    EXPECT_EQ(Finished, machine.feedPrecedingCodeUnit('-'));
+    EXPECT_EQ(-1, machine.finalizeAndGetBoundaryOffset());
+    EXPECT_EQ(-1, machine.finalizeAndGetBoundaryOffset());
 
     machine.reset();
-    EXPECT_TRUE(machine.updateState('\t'));
-    EXPECT_EQ(1, machine.finalizeAndGetCodeUnitCountToBeDeleted());
-    EXPECT_EQ(1, machine.finalizeAndGetCodeUnitCountToBeDeleted());
+    EXPECT_EQ(Finished, machine.feedPrecedingCodeUnit('\t'));
+    EXPECT_EQ(-1, machine.finalizeAndGetBoundaryOffset());
+    EXPECT_EQ(-1, machine.finalizeAndGetBoundaryOffset());
 
     machine.reset();
     // U+3042 HIRAGANA LETTER A.
-    EXPECT_TRUE(machine.updateState(0x3042));
-    EXPECT_EQ(1, machine.finalizeAndGetCodeUnitCountToBeDeleted());
-    EXPECT_EQ(1, machine.finalizeAndGetCodeUnitCountToBeDeleted());
+    EXPECT_EQ(Finished, machine.feedPrecedingCodeUnit(0x3042));
+    EXPECT_EQ(-1, machine.finalizeAndGetBoundaryOffset());
+    EXPECT_EQ(-1, machine.finalizeAndGetBoundaryOffset());
 }
 
 TEST(BackspaceStateMachineTest, SurrogatePair)
 {
     BackspaceStateMachine machine;
 
     // U+1F5FA(WORLD MAP) is \uD83D\uDDFA in UTF-16.
     uint16_t leadSurrogate = 0xD83D;
     uint16_t trailSurrogate = 0xDDFA;
 
-    EXPECT_FALSE(machine.updateState(trailSurrogate));
-    EXPECT_TRUE(machine.updateState(leadSurrogate));
-    EXPECT_EQ(2, machine.finalizeAndGetCodeUnitCountToBeDeleted());
-    EXPECT_EQ(2, machine.finalizeAndGetCodeUnitCountToBeDeleted());
+    EXPECT_EQ(NeedMoreCodeUnit, machine.feedPrecedingCodeUnit(trailSurrogate));
+    EXPECT_EQ(Finished, machine.feedPrecedingCodeUnit(leadSurrogate));
+    EXPECT_EQ(-2, machine.finalizeAndGetBoundaryOffset());
+    EXPECT_EQ(-2, machine.finalizeAndGetBoundaryOffset());
 
     // Edge cases
     // Unpaired trailing surrogate. Delete only broken trail surrogate.
     machine.reset();
-    EXPECT_FALSE(machine.updateState(trailSurrogate));
-    EXPECT_EQ(1, machine.finalizeAndGetCodeUnitCountToBeDeleted());
-    EXPECT_EQ(1, machine.finalizeAndGetCodeUnitCountToBeDeleted());
+    EXPECT_EQ(NeedMoreCodeUnit, machine.feedPrecedingCodeUnit(trailSurrogate));
+    EXPECT_EQ(-1, machine.finalizeAndGetBoundaryOffset());
+    EXPECT_EQ(-1, machine.finalizeAndGetBoundaryOffset());
 
     machine.reset();
-    EXPECT_FALSE(machine.updateState(trailSurrogate));
-    EXPECT_TRUE(machine.updateState('a'));
-    EXPECT_EQ(1, machine.finalizeAndGetCodeUnitCountToBeDeleted());
-    EXPECT_EQ(1, machine.finalizeAndGetCodeUnitCountToBeDeleted());
+    EXPECT_EQ(NeedMoreCodeUnit, machine.feedPrecedingCodeUnit(trailSurrogate));
+    EXPECT_EQ(Finished, machine.feedPrecedingCodeUnit('a'));
+    EXPECT_EQ(-1, machine.finalizeAndGetBoundaryOffset());
+    EXPECT_EQ(-1, machine.finalizeAndGetBoundaryOffset());
 
     machine.reset();
-    EXPECT_FALSE(machine.updateState(trailSurrogate));
-    EXPECT_TRUE(machine.updateState(trailSurrogate));
-    EXPECT_EQ(1, machine.finalizeAndGetCodeUnitCountToBeDeleted());
-    EXPECT_EQ(1, machine.finalizeAndGetCodeUnitCountToBeDeleted());
+    EXPECT_EQ(NeedMoreCodeUnit, machine.feedPrecedingCodeUnit(trailSurrogate));
+    EXPECT_EQ(Finished, machine.feedPrecedingCodeUnit(trailSurrogate));
+    EXPECT_EQ(-1, machine.finalizeAndGetBoundaryOffset());
+    EXPECT_EQ(-1, machine.finalizeAndGetBoundaryOffset());
 
     // Unpaired leading surrogate. Delete only broken lead surrogate.
     machine.reset();
-    EXPECT_TRUE(machine.updateState(leadSurrogate));
-    EXPECT_EQ(1, machine.finalizeAndGetCodeUnitCountToBeDeleted());
-    EXPECT_EQ(1, machine.finalizeAndGetCodeUnitCountToBeDeleted());
+    EXPECT_EQ(Finished, machine.feedPrecedingCodeUnit(leadSurrogate));
+    EXPECT_EQ(-1, machine.finalizeAndGetBoundaryOffset());
+    EXPECT_EQ(-1, machine.finalizeAndGetBoundaryOffset());
 }
 
 } // namespace blink