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176 lines
7.0 KiB
C++
176 lines
7.0 KiB
C++
//===- llvm/unittest/Support/NativeFormatTests.cpp - formatting tests -----===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/SmallString.h"
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#include "llvm/Support/NativeFormatting.h"
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#include "llvm/Support/raw_ostream.h"
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#include "gtest/gtest.h"
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#include <type_traits>
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using namespace llvm;
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namespace {
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template <typename T> std::string format_number(T N, IntegerStyle Style) {
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std::string S;
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llvm::raw_string_ostream Str(S);
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write_integer(Str, N, 0, Style);
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Str.flush();
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return S;
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}
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std::string format_number(uint64_t N, HexPrintStyle Style,
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Optional<size_t> Width = None) {
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std::string S;
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llvm::raw_string_ostream Str(S);
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write_hex(Str, N, Style, Width);
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Str.flush();
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return S;
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}
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std::string format_number(double D, FloatStyle Style,
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Optional<size_t> Precision = None) {
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std::string S;
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llvm::raw_string_ostream Str(S);
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write_double(Str, D, Style, Precision);
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Str.flush();
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return S;
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}
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// Test basic number formatting with various styles and default width and
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// precision.
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TEST(NativeFormatTest, BasicIntegerTests) {
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// Simple integers with no decimal.
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EXPECT_EQ("0", format_number(0, IntegerStyle::Integer));
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EXPECT_EQ("2425", format_number(2425, IntegerStyle::Integer));
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EXPECT_EQ("-2425", format_number(-2425, IntegerStyle::Integer));
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EXPECT_EQ("0", format_number(0LL, IntegerStyle::Integer));
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EXPECT_EQ("257257257235709",
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format_number(257257257235709LL, IntegerStyle::Integer));
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EXPECT_EQ("-257257257235709",
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format_number(-257257257235709LL, IntegerStyle::Integer));
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// Number formatting.
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EXPECT_EQ("0", format_number(0, IntegerStyle::Number));
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EXPECT_EQ("2,425", format_number(2425, IntegerStyle::Number));
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EXPECT_EQ("-2,425", format_number(-2425, IntegerStyle::Number));
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EXPECT_EQ("257,257,257,235,709",
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format_number(257257257235709LL, IntegerStyle::Number));
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EXPECT_EQ("-257,257,257,235,709",
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format_number(-257257257235709LL, IntegerStyle::Number));
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// Hex formatting.
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// lower case, prefix.
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EXPECT_EQ("0x0", format_number(0, HexPrintStyle::PrefixLower));
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EXPECT_EQ("0xbeef", format_number(0xbeefLL, HexPrintStyle::PrefixLower));
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EXPECT_EQ("0xdeadbeef",
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format_number(0xdeadbeefLL, HexPrintStyle::PrefixLower));
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// upper-case, prefix.
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EXPECT_EQ("0x0", format_number(0, HexPrintStyle::PrefixUpper));
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EXPECT_EQ("0xBEEF", format_number(0xbeefLL, HexPrintStyle::PrefixUpper));
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EXPECT_EQ("0xDEADBEEF",
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format_number(0xdeadbeefLL, HexPrintStyle::PrefixUpper));
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// lower-case, no prefix
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EXPECT_EQ("0", format_number(0, HexPrintStyle::Lower));
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EXPECT_EQ("beef", format_number(0xbeefLL, HexPrintStyle::Lower));
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EXPECT_EQ("deadbeef", format_number(0xdeadbeefLL, HexPrintStyle::Lower));
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// upper-case, no prefix.
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EXPECT_EQ("0", format_number(0, HexPrintStyle::Upper));
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EXPECT_EQ("BEEF", format_number(0xbeef, HexPrintStyle::Upper));
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EXPECT_EQ("DEADBEEF", format_number(0xdeadbeef, HexPrintStyle::Upper));
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}
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// Test basic floating point formatting with various styles and default width
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// and precision.
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TEST(NativeFormatTest, BasicFloatingPointTests) {
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// Double
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EXPECT_EQ("0.000000e+00", format_number(0.0, FloatStyle::Exponent));
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EXPECT_EQ("-0.000000e+00", format_number(-0.0, FloatStyle::Exponent));
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EXPECT_EQ("1.100000e+00", format_number(1.1, FloatStyle::Exponent));
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EXPECT_EQ("1.100000E+00", format_number(1.1, FloatStyle::ExponentUpper));
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// Default precision is 2 for floating points.
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EXPECT_EQ("1.10", format_number(1.1, FloatStyle::Fixed));
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EXPECT_EQ("1.34", format_number(1.34, FloatStyle::Fixed));
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EXPECT_EQ("1.34", format_number(1.344, FloatStyle::Fixed));
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EXPECT_EQ("1.35", format_number(1.346, FloatStyle::Fixed));
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}
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// Test common boundary cases and min/max conditions.
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TEST(NativeFormatTest, BoundaryTests) {
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// Min and max.
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EXPECT_EQ("18446744073709551615",
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format_number(UINT64_MAX, IntegerStyle::Integer));
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EXPECT_EQ("9223372036854775807",
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format_number(INT64_MAX, IntegerStyle::Integer));
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EXPECT_EQ("-9223372036854775808",
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format_number(INT64_MIN, IntegerStyle::Integer));
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EXPECT_EQ("4294967295", format_number(UINT32_MAX, IntegerStyle::Integer));
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EXPECT_EQ("2147483647", format_number(INT32_MAX, IntegerStyle::Integer));
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EXPECT_EQ("-2147483648", format_number(INT32_MIN, IntegerStyle::Integer));
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EXPECT_EQ("nan", format_number(std::numeric_limits<double>::quiet_NaN(),
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FloatStyle::Fixed));
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EXPECT_EQ("INF", format_number(std::numeric_limits<double>::infinity(),
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FloatStyle::Fixed));
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}
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TEST(NativeFormatTest, HexTests) {
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// Test hex formatting with different widths and precisions.
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// Width less than the value should print the full value anyway.
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EXPECT_EQ("0x0", format_number(0, HexPrintStyle::PrefixLower, 0));
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EXPECT_EQ("0xabcde", format_number(0xABCDE, HexPrintStyle::PrefixLower, 3));
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// Precision greater than the value should pad with 0s.
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// TODO: The prefix should not be counted in the precision. But unfortunately
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// it is and we have to live with it unless we fix all existing users of
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// prefixed hex formatting.
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EXPECT_EQ("0x000", format_number(0, HexPrintStyle::PrefixLower, 5));
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EXPECT_EQ("0x0abcde", format_number(0xABCDE, HexPrintStyle::PrefixLower, 8));
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EXPECT_EQ("00000", format_number(0, HexPrintStyle::Lower, 5));
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EXPECT_EQ("000abcde", format_number(0xABCDE, HexPrintStyle::Lower, 8));
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// Try printing more digits than can fit in a uint64.
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EXPECT_EQ("0x00000000000000abcde",
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format_number(0xABCDE, HexPrintStyle::PrefixLower, 21));
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}
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TEST(NativeFormatTest, IntegerTests) {
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EXPECT_EQ("-10", format_number(-10, IntegerStyle::Integer));
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EXPECT_EQ("-100", format_number(-100, IntegerStyle::Integer));
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EXPECT_EQ("-1000", format_number(-1000, IntegerStyle::Integer));
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EXPECT_EQ("-1234567890", format_number(-1234567890, IntegerStyle::Integer));
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EXPECT_EQ("10", format_number(10, IntegerStyle::Integer));
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EXPECT_EQ("100", format_number(100, IntegerStyle::Integer));
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EXPECT_EQ("1000", format_number(1000, IntegerStyle::Integer));
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EXPECT_EQ("1234567890", format_number(1234567890, IntegerStyle::Integer));
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}
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TEST(NativeFormatTest, CommaTests) {
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EXPECT_EQ("0", format_number(0, IntegerStyle::Number));
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EXPECT_EQ("10", format_number(10, IntegerStyle::Number));
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EXPECT_EQ("100", format_number(100, IntegerStyle::Number));
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EXPECT_EQ("1,000", format_number(1000, IntegerStyle::Number));
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EXPECT_EQ("1,234,567,890", format_number(1234567890, IntegerStyle::Number));
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EXPECT_EQ("-10", format_number(-10, IntegerStyle::Number));
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EXPECT_EQ("-100", format_number(-100, IntegerStyle::Number));
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EXPECT_EQ("-1,000", format_number(-1000, IntegerStyle::Number));
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EXPECT_EQ("-1,234,567,890", format_number(-1234567890, IntegerStyle::Number));
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}
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}
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