[layoutng] Correctly resolve indefinite percentages

third_party/WebKit/Source/core/layout/ng/ng_length_utils_test.cc

 // 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/layout/ng/ng_length_utils.h"
 
 #include "core/layout/ng/ng_constraint_space.h"
 #include "core/layout/ng/ng_margin_strut.h"
 #include "core/style/ComputedStyle.h"
 #include "platform/CalculationValue.h"
@@ skipping 141 matching lines @@
   style_->setMaxHeight(Length(80, Percent));
   EXPECT_EQ(LayoutUnit(240), computeBlockSizeForFragment());
 
   style_->setLogicalHeight(Length(100, Fixed));
   style_->setMinHeight(Length(80, Percent));
   EXPECT_EQ(LayoutUnit(240), computeBlockSizeForFragment());
 
   // TODO(layout-ng): test {min,max}-content on max-height.
 }
 
+TEST_F(NGLengthUtilsTest, testIndefinitePercentages) {
+  style_->setMinHeight(Length(20, Fixed));
+  style_->setHeight(Length(20, Percent));
+
+  EXPECT_EQ(NGSizeIndefinite,
+            computeBlockSizeForFragment(constructConstraintSpace(200, -1),
+                                        LayoutUnit(-1)));
+  EXPECT_EQ(LayoutUnit(20),
+            computeBlockSizeForFragment(constructConstraintSpace(200, -1),
+                                        LayoutUnit(10)));
+  EXPECT_EQ(LayoutUnit(120),
+            computeBlockSizeForFragment(constructConstraintSpace(200, -1),
+                                        LayoutUnit(120)));
+}
+
 TEST_F(NGLengthUtilsTest, testMargins) {
   style_->setMarginTop(Length(10, Percent));
   style_->setMarginRight(Length(52, Fixed));
   style_->setMarginBottom(Length(Auto));
   style_->setMarginLeft(Length(11, Percent));
 
   NGConstraintSpace constraintSpace(constructConstraintSpace(200, 300));
 
   NGBoxMargins margins = computeMargins(constraintSpace, *style_);
 
   EXPECT_EQ(LayoutUnit(20), margins.blockStart);
   EXPECT_EQ(LayoutUnit(52), margins.inlineEnd);
   EXPECT_EQ(LayoutUnit(), margins.blockEnd);
   EXPECT_EQ(LayoutUnit(22), margins.inlineStart);
 }
 
 }  // namespace
 }  // namespace blink