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
diff --git a/tests/PackBitsTest.cpp b/tests/PackBitsTest.cpp
new file mode 100644
index 0000000..6e69f82
--- /dev/null
+++ b/tests/PackBitsTest.cpp
@@ -0,0 +1,144 @@
+#include "Test.h"
+#include "SkPackBits.h"
+
+static const uint16_t gTest0[] = { 0, 0, 1, 1 };
+static const uint16_t gTest1[] = { 1, 2, 3, 4, 5, 6 };
+static const uint16_t gTest2[] = { 0, 0, 0, 1, 2, 3, 3, 3 };
+static const uint16_t gTest3[] = { 0, 0, 0, 0, 0, 0, 1, 2, 3, 3, 3, 0, 0, 1 };
+
+#include "SkRandom.h"
+static SkRandom gRand;
+static void rand_fill(uint16_t buffer[], int count) {
+ for (int i = 0; i < count; i++)
+ buffer[i] = (uint16_t)gRand.nextU();
+}
+
+static void test_pack16(skiatest::Reporter* reporter) {
+ static const struct {
+ const uint16_t* fSrc;
+ int fCount;
+ } gTests[] = {
+ { gTest0, SK_ARRAY_COUNT(gTest0) },
+ { gTest1, SK_ARRAY_COUNT(gTest1) },
+ { gTest2, SK_ARRAY_COUNT(gTest2) },
+ { gTest3, SK_ARRAY_COUNT(gTest3) }
+ };
+
+ for (size_t i = 0; i < SK_ARRAY_COUNT(gTests); i++) {
+ uint8_t dst[100];
+ size_t dstSize = SkPackBits::Pack16(gTests[i].fSrc,
+ gTests[i].fCount, dst);
+ uint16_t src[100];
+ int srcCount = SkPackBits::Unpack16(dst, dstSize, src);
+ bool match = gTests[i].fCount == srcCount && memcmp(gTests[i].fSrc, src,
+ gTests[i].fCount * sizeof(uint16_t)) == 0;
+ REPORTER_ASSERT(reporter, match);
+ }
+
+ for (int n = 1000; n; n--) {
+ size_t size = 50;
+ uint16_t src[100], src2[100];
+ uint8_t dst[200];
+ rand_fill(src, size);
+
+ size_t dstSize = SkPackBits::Pack16(src, size, dst);
+ size_t maxSize = SkPackBits::ComputeMaxSize16(size);
+ REPORTER_ASSERT(reporter, maxSize >= dstSize);
+
+ int srcCount = SkPackBits::Unpack16(dst, dstSize, src2);
+ REPORTER_ASSERT(reporter, size == srcCount);
+ bool match = memcmp(src, src2, size * sizeof(uint16_t)) == 0;
+ REPORTER_ASSERT(reporter, match);
+ }
+}
+
+static const uint8_t gTest80[] = { 0, 0, 1, 1 };
+static const uint8_t gTest81[] = { 1, 2, 3, 4, 5, 6 };
+static const uint8_t gTest82[] = { 0, 0, 0, 1, 2, 3, 3, 3 };
+static const uint8_t gTest83[] = { 0, 0, 0, 0, 0, 0, 1, 2, 3, 3, 3, 0, 0, 1 };
+static const uint8_t gTest84[] = { 1, 0, 3, 0, 0, 0, 2, 1, 1, 2 };
+
+static void rand_fill(uint8_t buffer[], int count) {
+ for (int i = 0; i < count; i++)
+ buffer[i] = (uint8_t)((gRand.nextU() >> 8) & 0x3);
+}
+
+static void test_pack8(skiatest::Reporter* reporter) {
+ static const struct {
+ const uint8_t* fSrc;
+ int fCount;
+ } gTests[] = {
+ { gTest80, SK_ARRAY_COUNT(gTest80) },
+ { gTest81, SK_ARRAY_COUNT(gTest81) },
+ { gTest82, SK_ARRAY_COUNT(gTest82) },
+ { gTest83, SK_ARRAY_COUNT(gTest83) },
+ { gTest84, SK_ARRAY_COUNT(gTest84) }
+ };
+
+ for (size_t i = 4; i < SK_ARRAY_COUNT(gTests); i++) {
+ uint8_t dst[100];
+ size_t maxSize = SkPackBits::ComputeMaxSize8(gTests[i].fCount);
+ size_t dstSize = SkPackBits::Pack8(gTests[i].fSrc,
+ gTests[i].fCount, dst);
+ REPORTER_ASSERT(reporter, dstSize <= maxSize);
+ uint8_t src[100];
+ int srcCount = SkPackBits::Unpack8(dst, dstSize, src);
+ bool match = gTests[i].fCount == srcCount &&
+ memcmp(gTests[i].fSrc, src,
+ gTests[i].fCount * sizeof(uint8_t)) == 0;
+ REPORTER_ASSERT(reporter, match);
+ }
+
+ for (size_t size = 1; size <= 512; size += 1) {
+ for (int n = 200; n; n--) {
+ uint8_t src[600], src2[600];
+ uint8_t dst[600];
+ rand_fill(src, size);
+
+ size_t dstSize = SkPackBits::Pack8(src, size, dst);
+ size_t maxSize = SkPackBits::ComputeMaxSize8(size);
+ REPORTER_ASSERT(reporter, maxSize >= dstSize);
+
+ int srcCount = SkPackBits::Unpack8(dst, dstSize, src2);
+ REPORTER_ASSERT(reporter, size == srcCount);
+ bool match = memcmp(src, src2, size * sizeof(uint8_t)) == 0;
+ REPORTER_ASSERT(reporter, match);
+
+ for (int j = 0; j < 200; j++) {
+ size_t skip = gRand.nextU() % size;
+ size_t write = gRand.nextU() % size;
+ if (skip + write > size) {
+ write = size - skip;
+ }
+ SkPackBits::Unpack8(src, skip, write, dst);
+ bool match = memcmp(src, src2 + skip, write) == 0;
+ REPORTER_ASSERT(reporter, match);
+ }
+ }
+ }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+namespace skiatest {
+
+ class PackBitsTest : public Test {
+ public:
+ static Test* Factory(void*) {
+ return SkNEW(PackBitsTest);
+ }
+
+ protected:
+ virtual void onGetName(SkString* name) {
+ name->set("PackBits");
+ }
+
+ virtual void onRun(Reporter* reporter) {
+ test_pack8(reporter);
+ test_pack16(reporter);
+ }
+ };
+
+ static TestRegistry gReg(PackBitsTest::Factory);
+}
+