unittest for kUTF32_TextEncoding

git-svn-id: http://skia.googlecode.com/svn/trunk@3390 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 41 insertions, 0 deletions

diff --git a/tests/UnicodeTest.cpp b/tests/UnicodeTest.cpp
index 602ff81431..04fee49608 100644
--- a/tests/UnicodeTest.cpp
+++ b/tests/UnicodeTest.cpp
@@ -6,6 +6,7 @@
  * found in the LICENSE file.
  */
 #include "Test.h"
+#include "SkPaint.h"
 #include "SkUtils.h"
 
 // Unicode Variation Selector ranges: inclusive
@@ -37,8 +38,48 @@ static void test_uvs(skiatest::Reporter* reporter) {
     }
 }
 
+// Simple test to ensure that when we call textToGlyphs, we get the same
+// result (for the same text) when using UTF8, UTF16, UTF32.
+// TODO: make the text more complex (i.e. incorporate chars>7bits)
+static void test_textencodings(skiatest::Reporter* reporter) {
+    const char text8[] = "ABCDEFGabcdefg0123456789";
+    uint16_t text16[sizeof(text8)];
+    int32_t  text32[sizeof(text8)];
+    size_t len8 = strlen(text8);
+    size_t len16 = len8 * 2;
+    size_t len32 = len8 * 4;
+
+    // expand our 8bit chars to 16 and 32
+    for (size_t i = 0; i < len8; ++i) {
+        text32[i] = text16[i] = text8[i];
+    }
+
+    uint16_t glyphs8[sizeof(text8)];
+    uint16_t glyphs16[sizeof(text8)];
+    uint16_t glyphs32[sizeof(text8)];
+
+    SkPaint paint;
+
+    paint.setTextEncoding(SkPaint::kUTF8_TextEncoding);
+    int count8  = paint.textToGlyphs(text8,  len8,  glyphs8);
+
+    paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
+    int count16 = paint.textToGlyphs(text16, len16, glyphs16);
+
+    paint.setTextEncoding(SkPaint::kUTF32_TextEncoding);
+    int count32 = paint.textToGlyphs(text32, len32, glyphs32);
+
+    REPORTER_ASSERT(reporter, len8 == count8);
+    REPORTER_ASSERT(reporter, len8 == count16);
+    REPORTER_ASSERT(reporter, len8 == count32);
+    
+    REPORTER_ASSERT(reporter, !memcmp(glyphs8, glyphs16, count8 * sizeof(uint16_t)));
+    REPORTER_ASSERT(reporter, !memcmp(glyphs8, glyphs32, count8 * sizeof(uint16_t)));
+}
+
 static void TestUnicode(skiatest::Reporter* reporter) {
     test_uvs(reporter);
+    test_textencodings(reporter);
 }
 
 #include "TestClassDef.h"