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unittests: add test for APInt::toString() 

Follow up to r133032.

llvm-svn: 133107
This commit is contained in:
Dylan Noblesmith 2011-06-15 23:36:34 +00:00
parent 96adc4a540
commit c8c184d2f8
1 changed files with 46 additions and 0 deletions
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46
llvm/unittests/ADT/APIntTest.cpp
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@ -320,6 +320,52 @@ TEST(APIntTest, StringBitsNeeded16) {
EXPECT_EQ(9U, APInt::getBitsNeeded("-20", 16));
}
TEST(APIntTest, toString) {
SmallString<16> S;
bool isSigned;
APInt(8, 0).toString(S, 2, true, true);
EXPECT_EQ(S.str().str(), "0b0");
S.clear();
APInt(8, 0).toString(S, 8, true, true);
EXPECT_EQ(S.str().str(), "00");
S.clear();
APInt(8, 0).toString(S, 10, true, true);
EXPECT_EQ(S.str().str(), "0");
S.clear();
APInt(8, 0).toString(S, 16, true, true);
EXPECT_EQ(S.str().str(), "0x0");
S.clear();
isSigned = false;
APInt(8, 255, isSigned).toString(S, 2, isSigned, true);
EXPECT_EQ(S.str().str(), "0b11111111");
S.clear();
APInt(8, 255, isSigned).toString(S, 8, isSigned, true);
EXPECT_EQ(S.str().str(), "0377");
S.clear();
APInt(8, 255, isSigned).toString(S, 10, isSigned, true);
EXPECT_EQ(S.str().str(), "255");
S.clear();
APInt(8, 255, isSigned).toString(S, 16, isSigned, true);
EXPECT_EQ(S.str().str(), "0xFF");
S.clear();
isSigned = true;
APInt(8, 255, isSigned).toString(S, 2, isSigned, true);
EXPECT_EQ(S.str().str(), "-0b1");
S.clear();
APInt(8, 255, isSigned).toString(S, 8, isSigned, true);
EXPECT_EQ(S.str().str(), "-01");
S.clear();
APInt(8, 255, isSigned).toString(S, 10, isSigned, true);
EXPECT_EQ(S.str().str(), "-1");
S.clear();
APInt(8, 255, isSigned).toString(S, 16, isSigned, true);
EXPECT_EQ(S.str().str(), "-0x1");
S.clear();
}
TEST(APIntTest, Log2) {
EXPECT_EQ(APInt(15, 7).logBase2(), 2U);
EXPECT_EQ(APInt(15, 7).ceilLogBase2(), 3U);