//===----------------------------------------------------------------------===//
#include "gtest/gtest.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
return res;
}
+/// printToString - Print the given value to a stream which only has \arg
+/// BytesLeftInBuffer bytes left in the buffer. This is useful for testing edge
+/// cases in the buffer handling logic.
+template<typename T> std::string printToString(const T &Value,
+ unsigned BytesLeftInBuffer) {
+ // FIXME: This is relying on internal knowledge of how raw_ostream works to
+ // get the buffer position right.
+ SmallString<256> SVec;
+ assert(BytesLeftInBuffer < 256 && "Invalid buffer count!");
+ llvm::raw_svector_ostream OS(SVec);
+ unsigned StartIndex = 256 - BytesLeftInBuffer;
+ for (unsigned i = 0; i != StartIndex; ++i)
+ OS << '?';
+ OS << Value;
+ return OS.str().substr(StartIndex);
+}
+
template<typename T> std::string printToStringUnbuffered(const T &Value) {
std::string res;
llvm::raw_string_ostream OS(res);
EXPECT_EQ("-9223372036854775808", printToStringUnbuffered(INT64_MIN));
}
+TEST(raw_ostreamTest, BufferEdge) {
+ EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 1));
+ EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 2));
+ EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 3));
+ EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 4));
+ EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 10));
+}
+
}