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Add support for '%' type to output floating point values as a

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percentage.

This helps with compatibility with Python's format strings.
This commit is contained in:
gawain
2019-03-01 20:32:05 +01:00
committed by Victor Zverovich
parent 287eaab3b2
commit 79b79f329e
3 changed files with 45 additions and 8 deletions
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11
test/format-test.cc
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@@ -1207,6 +1207,8 @@ TEST(FormatterTest, Precision) {
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.2f}", 42ull), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.2%}", 42), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:3.0}", 'x'), format_error,
"precision not allowed for this argument type");
EXPECT_EQ("1.2", format("{0:.2}", 1.2345));
@@ -1440,10 +1442,11 @@ TEST(FormatterTest, FormatConvertibleToLongLong) {
TEST(FormatterTest, FormatFloat) {
EXPECT_EQ("392.500000", format("{0:f}", 392.5f));
EXPECT_EQ("12.500000%", format("{0:%}", 0.125f));
}
TEST(FormatterTest, FormatDouble) {
check_unknown_types(1.2, "eEfFgGaA", "double");
check_unknown_types(1.2, "eEfFgGaA%", "double");
EXPECT_EQ("0.0", format("{:}", 0.0));
EXPECT_EQ("0.000000", format("{:f}", 0.0));
EXPECT_EQ("0", format("{:g}", 0.0));
@@ -1452,6 +1455,8 @@ TEST(FormatterTest, FormatDouble) {
EXPECT_EQ("392.65", format("{:G}", 392.65));
EXPECT_EQ("392.650000", format("{:f}", 392.65));
EXPECT_EQ("392.650000", format("{:F}", 392.65));
EXPECT_EQ("12.500000%", format("{:%}", 0.125));
EXPECT_EQ("12.34%", format("{:.2%}", 0.1234432));
char buffer[BUFFER_SIZE];
safe_sprintf(buffer, "%e", 392.65);
EXPECT_EQ(buffer, format("{0:e}", 392.65));
@@ -1473,6 +1478,7 @@ TEST(FormatterTest, FormatNaN) {
EXPECT_EQ("nan ", format("{:<7}", nan));
EXPECT_EQ(" nan ", format("{:^7}", nan));
EXPECT_EQ(" nan", format("{:>7}", nan));
EXPECT_EQ("nan%", format("{:%}", nan));
}
TEST(FormatterTest, FormatInfinity) {
@@ -1485,6 +1491,7 @@ TEST(FormatterTest, FormatInfinity) {
EXPECT_EQ("inf ", format("{:<7}", inf));
EXPECT_EQ(" inf ", format("{:^7}", inf));
EXPECT_EQ(" inf", format("{:>7}", inf));
EXPECT_EQ("inf%", format("{:%}", inf));
}
TEST(FormatterTest, FormatLongDouble) {
@@ -1495,6 +1502,8 @@ TEST(FormatterTest, FormatLongDouble) {
EXPECT_EQ("392.65", format("{0:G}", 392.65l));
EXPECT_EQ("392.650000", format("{0:f}", 392.65l));
EXPECT_EQ("392.650000", format("{0:F}", 392.65l));
EXPECT_EQ("12.500000%", format("{:%}", 0.125l));
EXPECT_EQ("12.34%", format("{:.2%}", 0.1234432l));
char buffer[BUFFER_SIZE];
safe_sprintf(buffer, "%Le", 392.65l);
EXPECT_EQ(buffer, format("{0:e}", 392.65l));