add initial unittest framework (tests)

move some previous unittests out of core classes and into tests



git-svn-id: http://skia.googlecode.com/svn/trunk@96 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 0 insertions, 393 deletions

diff --git a/src/core/SkMath.cpp b/src/core/SkMath.cpp
index e0babeb5e7..649b51890a 100644
--- a/src/core/SkMath.cpp
+++ b/src/core/SkMath.cpp
@@ -543,396 +543,3 @@ SkFixed SkFixedATan2(SkFixed y, SkFixed x) { return SkCordicATan2(y, x); }
 SkFixed SkFixedExp(SkFixed x) { return SkCordicExp(x); }
 SkFixed SkFixedLog(SkFixed x) { return SkCordicLog(x); }
 
-///////////////////////////////////////////////////////////////////////////////
-///////////////////////////////////////////////////////////////////////////////
-
-#ifdef SK_DEBUG
-
-#include "SkRandom.h"
-
-#if defined(SkLONGLONG) && defined(SK_SUPPORT_UNITTEST)
-static int symmetric_fixmul(int a, int b) {
-    int sa = SkExtractSign(a);
-    int sb = SkExtractSign(b);
-
-    a = SkApplySign(a, sa);
-    b = SkApplySign(b, sb);
-
-#if 1
-    int c = (int)(((SkLONGLONG)a * b) >> 16);
-    
-    return SkApplySign(c, sa ^ sb);
-#else
-    SkLONGLONG ab = (SkLONGLONG)a * b;
-    if (sa ^ sb) {
-        ab = -ab;
-    }
-    return ab >> 16;
-#endif
-}
-#endif
-
-#include "SkPoint.h"
-
-#ifdef SK_SUPPORT_UNITTEST
-static void check_length(const SkPoint& p, SkScalar targetLen) {
-#ifdef SK_CAN_USE_FLOAT
-    float x = SkScalarToFloat(p.fX);
-    float y = SkScalarToFloat(p.fY);
-    float len = sk_float_sqrt(x*x + y*y);
-    
-    len /= SkScalarToFloat(targetLen);
-
-    SkASSERT(len > 0.999f && len < 1.001f);
-#endif
-}
-#endif
-
-#if defined(SK_CAN_USE_FLOAT) && defined(SK_SUPPORT_UNITTEST)
-
-static float nextFloat(SkRandom& rand) {
-    SkFloatIntUnion data;
-    data.fSignBitInt = rand.nextU();
-    return data.fFloat;
-}
-
-/*  returns true if a == b as resulting from (int)x. Since it is undefined
-    what to do if the float exceeds 2^32-1, we check for that explicitly.
-*/
-static bool equal_float_native_skia(float x, uint32_t ni, uint32_t si) {
-    if (!(x == x)) {    // NAN
-        return si == SK_MaxS32 || si == SK_MinS32;
-    }
-    // for out of range, C is undefined, but skia always should return NaN32
-    if (x > SK_MaxS32) {
-        return si == SK_MaxS32;
-    }
-    if (x < -SK_MaxS32) {
-        return si == SK_MinS32;
-    }
-    return si == ni;
-}
-
-static void assert_float_equal(const char op[], float x, uint32_t ni,
-                               uint32_t si) {
-    if (!equal_float_native_skia(x, ni, si)) {
-        SkDebugf("-- %s float %g bits %x native %x skia %x\n", op, x, ni, si);
-        SkASSERT(!"oops");
-    }
-}
-
-static void test_float_cast(float x) {
-    int ix = (int)x;
-    int iix = SkFloatToIntCast(x);
-    assert_float_equal("cast", x, ix, iix);
-}
-
-static void test_float_floor(float x) {
-    int ix = (int)floor(x);
-    int iix = SkFloatToIntFloor(x);
-    assert_float_equal("floor", x, ix, iix);
-}
-
-static void test_float_round(float x) {
-    double xx = x + 0.5;    // need intermediate double to avoid temp loss
-    int ix = (int)floor(xx);
-    int iix = SkFloatToIntRound(x);
-    assert_float_equal("round", x, ix, iix);
-}
-
-static void test_float_ceil(float x) {
-    int ix = (int)ceil(x);
-    int iix = SkFloatToIntCeil(x);
-    assert_float_equal("ceil", x, ix, iix);
-}
-
-static void test_float_conversions(float x) {
-    test_float_cast(x);
-    test_float_floor(x);
-    test_float_round(x);
-    test_float_ceil(x);
-}
-
-static void test_int2float(int ival) {
-    float x0 = (float)ival;
-    float x1 = SkIntToFloatCast(ival);
-    float x2 = SkIntToFloatCast_NoOverflowCheck(ival);
-    SkASSERT(x0 == x1);
-    SkASSERT(x0 == x2);
-}
-
-static void unittest_fastfloat() {
-    SkRandom rand;
-    size_t i;
-
-    static const float gFloats[] = {
-        0.f, 1.f, 0.5f, 0.499999f, 0.5000001f, 1.f/3,
-        0.000000001f, 1000000000.f,     // doesn't overflow
-        0.0000000001f, 10000000000.f    // does overflow
-    };
-    for (i = 0; i < SK_ARRAY_COUNT(gFloats); i++) {
-//        SkDebugf("---- test floats %g %d\n", gFloats[i], (int)gFloats[i]);
-        test_float_conversions(gFloats[i]);
-        test_float_conversions(-gFloats[i]);
-    }
-    
-    for (int outer = 0; outer < 100; outer++) {
-        rand.setSeed(outer);
-        for (i = 0; i < 100000; i++) {
-            float x = nextFloat(rand);
-            test_float_conversions(x);
-        }
-        
-        test_int2float(0);
-        test_int2float(1);
-        test_int2float(-1);
-        for (i = 0; i < 100000; i++) {
-            // for now only test ints that are 24bits or less, since we don't
-            // round (down) large ints the same as IEEE...
-            int ival = rand.nextU() & 0xFFFFFF;
-            test_int2float(ival);
-            test_int2float(-ival);
-        }
-    }
-}
-
-#endif
-
-#ifdef SK_SUPPORT_UNITTEST
-static void test_muldiv255() {
-#ifdef SK_CAN_USE_FLOAT
-    for (int a = 0; a <= 255; a++) {
-        for (int b = 0; b <= 255; b++) {
-            int ab = a * b;
-            float s = ab / 255.0f;
-            int round = (int)floorf(s + 0.5f);
-            int trunc = (int)floorf(s);
-            
-            int iround = SkMulDiv255Round(a, b);
-            int itrunc = SkMulDiv255Trunc(a, b);
-            
-            SkASSERT(iround == round);
-            SkASSERT(itrunc == trunc);
-            
-            SkASSERT(itrunc <= iround);
-            SkASSERT(iround <= a);
-            SkASSERT(iround <= b);
-        }
-    }
-#endif
-}
-#endif
-
-void SkMath::UnitTest() {    
-#ifdef SK_SUPPORT_UNITTEST
-    int         i;
-    int32_t     x;
-    SkRandom    rand;
-
-    SkToS8(127);    SkToS8(-128);       SkToU8(255);
-    SkToS16(32767); SkToS16(-32768);    SkToU16(65535);
-    SkToS32(2*1024*1024);   SkToS32(-2*1024*1024);  SkToU32(4*1024*1024);
-
-    SkCordic_UnitTest();
-
-    // these should assert
-#if 0
-    SkToS8(128);
-    SkToS8(-129);
-    SkToU8(256);
-    SkToU8(-5);
-
-    SkToS16(32768);
-    SkToS16(-32769);
-    SkToU16(65536);
-    SkToU16(-5);
-
-    if (sizeof(size_t) > 4) {
-        SkToS32(4*1024*1024);
-        SkToS32(-4*1024*1024);
-        SkToU32(5*1024*1024);
-        SkToU32(-5);
-    }
-#endif
-
-    test_muldiv255();
-
-#ifdef SK_DEBUG
-    {
-        SkScalar x = SK_ScalarNaN;
-        SkASSERT(SkScalarIsNaN(x));
-    }
-#endif
-
-    for (i = 1; i <= 10; i++) {
-        x = SkCubeRootBits(i*i*i, 11);
-        SkASSERT(x == i);
-    }
-
-    x = SkFixedSqrt(SK_Fixed1);
-    SkASSERT(x == SK_Fixed1);
-    x = SkFixedSqrt(SK_Fixed1/4);
-    SkASSERT(x == SK_Fixed1/2);
-    x = SkFixedSqrt(SK_Fixed1*4);
-    SkASSERT(x == SK_Fixed1*2);
-
-    x = SkFractSqrt(SK_Fract1);
-    SkASSERT(x == SK_Fract1);
-    x = SkFractSqrt(SK_Fract1/4);
-    SkASSERT(x == SK_Fract1/2);
-    x = SkFractSqrt(SK_Fract1/16);
-    SkASSERT(x == SK_Fract1/4);
-
-    for (i = 1; i < 100; i++) {
-        x = SkFixedSqrt(SK_Fixed1 * i * i);
-        SkASSERT(x == SK_Fixed1 * i);
-    }
-
-    for (i = 0; i < 1000; i++) {
-        int value = rand.nextS16();
-        int max = rand.nextU16();
-
-        int clamp = SkClampMax(value, max);
-        int clamp2 = value < 0 ? 0 : (value > max ? max : value);
-        SkASSERT(clamp == clamp2);
-    }
-    
-    for (i = 0; i < 100000; i++) {
-        SkPoint p;
-        
-        p.setLength(rand.nextS(), rand.nextS(), SK_Scalar1);
-        check_length(p, SK_Scalar1);
-        p.setLength(rand.nextS() >> 13, rand.nextS() >> 13, SK_Scalar1);
-        check_length(p, SK_Scalar1);
-    }
-
-    {
-        SkFixed result = SkFixedDiv(100, 100);
-        SkASSERT(result == SK_Fixed1);
-        result = SkFixedDiv(1, SK_Fixed1);
-        SkASSERT(result == 1);
-    }
-    
-#ifdef SK_CAN_USE_FLOAT
-    unittest_fastfloat();
-#endif
-    
-#ifdef SkLONGLONG
-    for (i = 0; i < 100000; i++) {
-        SkFixed numer = rand.nextS();
-        SkFixed denom = rand.nextS();
-        SkFixed result = SkFixedDiv(numer, denom);
-        SkLONGLONG check = ((SkLONGLONG)numer << 16) / denom;
-
-        (void)SkCLZ(numer);
-        (void)SkCLZ(denom);
-
-        SkASSERT(result != (SkFixed)SK_NaN32);
-        if (check > SK_MaxS32) {
-            check = SK_MaxS32;
-        } else if (check < -SK_MaxS32) {
-            check = SK_MinS32;
-        }
-        SkASSERT(result == (int32_t)check);
-
-        result = SkFractDiv(numer, denom);
-        check = ((SkLONGLONG)numer << 30) / denom;
-
-        SkASSERT(result != (SkFixed)SK_NaN32);
-        if (check > SK_MaxS32) {
-            check = SK_MaxS32;
-        } else if (check < -SK_MaxS32) {
-            check = SK_MinS32;
-        }
-        SkASSERT(result == (int32_t)check);
-
-        // make them <= 2^24, so we don't overflow in fixmul
-        numer = numer << 8 >> 8;
-        denom = denom << 8 >> 8;
-
-        result = SkFixedMul(numer, denom);
-        SkFixed r2 = symmetric_fixmul(numer, denom);
-//        SkASSERT(result == r2);
-
-        result = SkFixedMul(numer, numer);
-        r2 = SkFixedSquare(numer);
-        SkASSERT(result == r2);
-        
-#ifdef SK_CAN_USE_FLOAT
-        if (numer >= 0 && denom >= 0) {
-            SkFixed mean = SkFixedMean(numer, denom);
-            float fm = sk_float_sqrt(sk_float_abs(SkFixedToFloat(numer) * SkFixedToFloat(denom)));
-            SkFixed mean2 = SkFloatToFixed(fm);
-            int diff = SkAbs32(mean - mean2);
-            SkASSERT(diff <= 1);
-        }
-
-        {
-            SkFixed mod = SkFixedMod(numer, denom);
-            float n = SkFixedToFloat(numer);
-            float d = SkFixedToFloat(denom);
-            float m = sk_float_mod(n, d);
-#if 0
-            SkDebugf("%g mod %g = %g [%g]\n",
-                    SkFixedToFloat(numer), SkFixedToFloat(denom),
-                    SkFixedToFloat(mod), m);
-#endif
-            SkASSERT(mod == 0 || (mod < 0) == (m < 0)); // ensure the same sign
-            int diff = SkAbs32(mod - SkFloatToFixed(m));
-            SkASSERT((diff >> 7) == 0);
-        }
-#endif
-    }
-#endif
-
-#ifdef SK_CAN_USE_FLOAT
-    for (i = 0; i < 100000; i++) {
-        SkFract x = rand.nextU() >> 1;
-        double xx = (double)x / SK_Fract1;
-        SkFract xr = SkFractSqrt(x);
-        SkFract check = SkFloatToFract(sqrt(xx));
-        SkASSERT(xr == check || xr == check-1 || xr == check+1);
-
-        xr = SkFixedSqrt(x);
-        xx = (double)x / SK_Fixed1;
-        check = SkFloatToFixed(sqrt(xx));
-        SkASSERT(xr == check || xr == check-1);
-
-        xr = SkSqrt32(x);
-        xx = (double)x;
-        check = (int32_t)sqrt(xx);
-        SkASSERT(xr == check || xr == check-1);
-    }
-#endif
-
-#if !defined(SK_SCALAR_IS_FLOAT) && defined(SK_CAN_USE_FLOAT)
-    {
-        SkFixed s, c;
-        s = SkFixedSinCos(0, &c);
-        SkASSERT(s == 0);
-        SkASSERT(c == SK_Fixed1);
-    }
-
-    int maxDiff = 0;
-    for (i = 0; i < 10000; i++) {
-        SkFixed rads = rand.nextS() >> 10;
-        double frads = SkFixedToFloat(rads);
-
-        SkFixed s, c;
-        s = SkScalarSinCos(rads, &c);
-
-        double fs = sin(frads);
-        double fc = cos(frads);
-
-        SkFixed is = SkFloatToFixed(fs);
-        SkFixed ic = SkFloatToFixed(fc);
-
-        maxDiff = SkMax32(maxDiff, SkAbs32(is - s));
-        maxDiff = SkMax32(maxDiff, SkAbs32(ic - c));
-    }
-    SkDebugf("SinCos: maximum error = %d\n", maxDiff);
-#endif
-#endif
-}
-
-#endif