1 files changed, 37 insertions, 0 deletions
diff --git a/samplecode/SampleText.cpp b/samplecode/SampleText.cpp
index 87ca91406b..f5f8dbefa0 100644
--- a/samplecode/SampleText.cpp
+++ b/samplecode/SampleText.cpp
@@ -27,6 +27,41 @@
 #include "SkStream.h"
 #include "SkXMLParser.h"
 
+static void test_breakText() {
+    SkPaint paint;
+    const char* text = "sdfkljAKLDFJKEWkldfjlk#$%&sdfs.dsj";
+    size_t length = strlen(text);
+    SkScalar width = paint.measureText(text, length);
+
+    SkScalar mm = 0;
+    SkScalar nn = 0;
+    for (SkScalar w = 0; w <= width; w += SK_Scalar1) {
+        SkScalar m;
+        size_t n = paint.breakText(text, length, w, &m);
+
+        SkASSERT(n <= length);
+        SkASSERT(m <= width);
+
+        if (n == 0) {
+            SkASSERT(m == 0);
+        } else {
+            // now assert that we're monotonic
+            if (n == nn) {
+                SkASSERT(m == mm);
+            } else {
+                SkASSERT(n > nn);
+                SkASSERT(m > mm);
+            }
+        }
+        nn = SkIntToScalar((unsigned int)n);
+        mm = m;
+    }
+
+    SkDEBUGCODE(size_t length2 =) paint.breakText(text, length, width, &mm);
+    SkASSERT(length2 == length);
+    SkASSERT(mm == width);
+}
+
 static const struct {
     const char* fName;
     uint32_t    fFlags;
@@ -74,6 +109,8 @@ public:
     TextSpeedView() {
         fHints = 0;
         fClickX = 0;
+
+        test_breakText();
     }
 
 protected: