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      1 
      2 /*
      3  * Copyright 2011 Google Inc.
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 // Unit tests for src/core/SkPoint.cpp and its header
      9 
     10 #include "SkPoint.h"
     11 #include "Test.h"
     12 
     13 // Tests that SkPoint::length() and SkPoint::Length() both return
     14 // approximately expectedLength for this (x,y).
     15 static void test_length(skiatest::Reporter* reporter, SkScalar x, SkScalar y,
     16                         SkScalar expectedLength) {
     17     SkPoint point;
     18     point.set(x, y);
     19     SkScalar s1 = point.length();
     20     SkScalar s2 = SkPoint::Length(x, y);
     21     //The following should be exactly the same, but need not be.
     22     //See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=323
     23     REPORTER_ASSERT(reporter, SkScalarNearlyEqual(s1, s2));
     24     REPORTER_ASSERT(reporter, SkScalarNearlyEqual(s1, expectedLength));
     25 }
     26 
     27 // Tests SkPoint::Normalize() for this (x,y)
     28 static void test_Normalize(skiatest::Reporter* reporter,
     29                            SkScalar x, SkScalar y) {
     30     SkPoint point;
     31     point.set(x, y);
     32     SkScalar oldLength = point.length();
     33     SkScalar returned = SkPoint::Normalize(&point);
     34     SkScalar newLength = point.length();
     35     REPORTER_ASSERT(reporter, SkScalarNearlyEqual(returned, oldLength));
     36     REPORTER_ASSERT(reporter, SkScalarNearlyEqual(newLength, SK_Scalar1));
     37 }
     38 
     39 static void PointTest(skiatest::Reporter* reporter) {
     40     test_length(reporter, SkIntToScalar(3), SkIntToScalar(4), SkIntToScalar(5));
     41     test_length(reporter, SkFloatToScalar(0.6f), SkFloatToScalar(0.8f),
     42                 SK_Scalar1);
     43     test_Normalize(reporter, SkIntToScalar(3), SkIntToScalar(4));
     44     test_Normalize(reporter, SkFloatToScalar(0.6f), SkFloatToScalar(0.8f));
     45 }
     46 
     47 #include "TestClassDef.h"
     48 DEFINE_TESTCLASS("Point", PointTestClass, PointTest)
     49