2008-11-24 15:51:33 -07:00
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package fmt
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import (
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"fmt";
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"io";
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"math";
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"testing";
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)
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func TestFmtInterface(t *testing.T) {
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var i1 interface{};
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i1 = "abc";
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s := fmt.Sprintf("%s", i1);
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if s != "abc" {
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t.Errorf(`fmt.Sprintf("%%s", empty("abc")) = %q want %q`, s, "abc");
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}
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}
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type fmtTest struct {
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fmt string;
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val interface { };
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out string;
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}
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const b32 uint32 = 1<<32 - 1
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const b64 uint64 = 1<<64 - 1
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var array = []int{1, 2, 3, 4, 5}
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var fmttests = []fmtTest{
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// basic string
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fmtTest{ "%s", "abc", "abc" },
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fmtTest{ "%x", "abc", "616263" },
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fmtTest{ "%x", "xyz", "78797a" },
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fmtTest{ "%X", "xyz", "78797A" },
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fmtTest{ "%q", "abc", `"abc"` },
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// basic bytes
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fmtTest{ "%s", io.StringBytes("abc"), "abc" },
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fmtTest{ "%x", io.StringBytes("abc"), "616263" },
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fmtTest{ "% x", io.StringBytes("abc"), "61 62 63" },
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fmtTest{ "%x", io.StringBytes("xyz"), "78797a" },
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fmtTest{ "%X", io.StringBytes("xyz"), "78797A" },
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fmtTest{ "%q", io.StringBytes("abc"), `"abc"` },
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// escaped strings
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fmtTest{ "%#q", `abc`, "`abc`" },
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fmtTest{ "%#q", `"`, "`\"`" },
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fmtTest{ "1 %#q", `\n`, "1 `\\n`" },
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fmtTest{ "2 %#q", "\n", `2 "\n"` },
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fmtTest{ "%q", `"`, `"\""` },
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fmtTest{ "%q", "\a\b\f\r\n\t\v", `"\a\b\f\r\n\t\v"` },
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fmtTest{ "%q", "abc\xffdef", `"abc\xffdef"` },
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fmtTest{ "%q", "\u263a", `"\u263a"` },
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fmtTest{ "%q", "\U0010ffff", `"\U0010ffff"` },
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// width
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fmtTest{ "%5s", "abc", " abc" },
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fmtTest{ "%-5s", "abc", "abc " },
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fmtTest{ "%05s", "abc", "00abc" },
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// integers
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fmtTest{ "%d", 12345, "12345" },
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fmtTest{ "%d", -12345, "-12345" },
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fmtTest{ "%10d", 12345, " 12345" },
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fmtTest{ "%10d", -12345, " -12345" },
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fmtTest{ "%+10d", 12345, " +12345" },
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fmtTest{ "%010d", 12345, "0000012345" },
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fmtTest{ "%010d", -12345, "-000012345" },
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fmtTest{ "%-10d", 12345, "12345 " },
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fmtTest{ "%010.3d", 1, " 001" },
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fmtTest{ "%010.3d", -1, " -001" },
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fmtTest{ "%+d", 12345, "+12345" },
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fmtTest{ "%+d", -12345, "-12345" },
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fmtTest{ "% d", 12345, " 12345" },
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fmtTest{ "% d", -12345, "-12345" },
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// arrays
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// TODO: when arrays work in interfaces, enable this line
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// and delete the TestArrayPrinter routine below
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// fmtTest{ "%v", array, "[1 2 3 4 5]" },
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fmtTest{ "%v", &array, "&[1 2 3 4 5]" },
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// old test/fmt_test.go
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fmtTest{ "%d", 1234, "1234" },
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fmtTest{ "%d", -1234, "-1234" },
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fmtTest{ "%d", uint(1234), "1234" },
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fmtTest{ "%d", uint32(b32), "4294967295" },
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fmtTest{ "%d", uint64(b64), "18446744073709551615" },
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fmtTest{ "%o", 01234, "1234" },
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fmtTest{ "%o", uint32(b32), "37777777777" },
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fmtTest{ "%o", uint64(b64), "1777777777777777777777" },
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fmtTest{ "%x", 0x1234abcd, "1234abcd" },
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fmtTest{ "%x", b32-0x1234567, "fedcba98" },
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fmtTest{ "%X", 0x1234abcd, "1234ABCD" },
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fmtTest{ "%X", b32-0x1234567, "FEDCBA98" },
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fmtTest{ "%x", b64, "ffffffffffffffff" },
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fmtTest{ "%b", 7, "111" },
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fmtTest{ "%b", b64, "1111111111111111111111111111111111111111111111111111111111111111" },
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fmtTest{ "%e", float64(1), "1.000000e+00" },
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fmtTest{ "%e", float64(1234.5678e3), "1.234568e+06" },
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fmtTest{ "%e", float64(1234.5678e-8), "1.234568e-05" },
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fmtTest{ "%e", float64(-7), "-7.000000e+00" },
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fmtTest{ "%e", float64(-1e-9), "-1.000000e-09" },
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fmtTest{ "%f", float64(1234.5678e3), "1234567.800000" },
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fmtTest{ "%f", float64(1234.5678e-8), "0.000012" },
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fmtTest{ "%f", float64(-7), "-7.000000" },
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fmtTest{ "%f", float64(-1e-9), "-0.000000" },
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fmtTest{ "%g", float64(1234.5678e3), "1.2345678e+06" },
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fmtTest{ "%g", float32(1234.5678e3), "1.2345678e+06" },
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fmtTest{ "%g", float64(1234.5678e-8), "1.2345678e-05" },
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fmtTest{ "%g", float64(-7), "-7" },
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fmtTest{ "%g", float64(-1e-9), "-1e-09", },
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fmtTest{ "%g", float32(-1e-9), "-1e-09" },
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fmtTest{ "%c", 'x', "x" },
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fmtTest{ "%c", 0xe4, "ä" },
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fmtTest{ "%c", 0x672c, "本" },
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fmtTest{ "%c", '日', "日" },
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fmtTest{ "%20.8d", 1234, " 00001234" },
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fmtTest{ "%20.8d", -1234, " -00001234" },
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fmtTest{ "%20d", 1234, " 1234" },
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fmtTest{ "%-20.8d", 1234, "00001234 " },
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fmtTest{ "%-20.8d", -1234, "-00001234 " },
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fmtTest{ "%.20b", 7, "00000000000000000111" },
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fmtTest{ "%20.5s", "qwertyuiop", " qwert" },
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fmtTest{ "%.5s", "qwertyuiop", "qwert" },
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fmtTest{ "%-20.5s", "qwertyuiop", "qwert " },
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fmtTest{ "%20c", 'x', " x" },
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fmtTest{ "%-20c", 'x', "x " },
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fmtTest{ "%20.6e", 1.2345e3, " 1.234500e+03" },
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fmtTest{ "%20.6e", 1.2345e-3, " 1.234500e-03" },
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fmtTest{ "%20e", 1.2345e3, " 1.234500e+03" },
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fmtTest{ "%20e", 1.2345e-3, " 1.234500e-03" },
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fmtTest{ "%20.8e", 1.2345e3, " 1.23450000e+03" },
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fmtTest{ "%20f", float64(1.23456789e3), " 1234.567890" },
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fmtTest{ "%20f", float64(1.23456789e-3), " 0.001235" },
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fmtTest{ "%20f", float64(12345678901.23456789), " 12345678901.234568" },
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fmtTest{ "%-20f", float64(1.23456789e3), "1234.567890 " },
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fmtTest{ "%20.8f", float64(1.23456789e3), " 1234.56789000" },
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fmtTest{ "%20.8f", float64(1.23456789e-3), " 0.00123457" },
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fmtTest{ "%g", float64(1.23456789e3), "1234.56789" },
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fmtTest{ "%g", float64(1.23456789e-3), "0.00123456789" },
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fmtTest{ "%g", float64(1.23456789e20), "1.23456789e+20" },
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fmtTest{ "%20e", math.Inf(1), " +Inf" },
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fmtTest{ "%-20f", math.Inf(-1), "-Inf " },
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fmtTest{ "%20g", math.NaN(), " NaN" },
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}
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func TestSprintf(t *testing.T) {
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for i := 0; i < len(fmttests); i++ {
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tt := fmttests[i];
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s := fmt.Sprintf(tt.fmt, tt.val);
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if s != tt.out {
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if ss, ok := tt.val.(string); ok {
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// Don't requote the already-quoted strings.
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// It's too confusing to read the errors.
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t.Errorf("fmt.Sprintf(%q, %q) = %s want %s", tt.fmt, tt.val, s, tt.out);
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} else {
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t.Errorf("fmt.Sprintf(%q, %v) = %q want %q", tt.fmt, tt.val, s, tt.out);
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}
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}
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}
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}
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type flagPrinter struct { }
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func (*flagPrinter) Format(f fmt.Formatter, c int) {
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s := "%";
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for i := 0; i < 128; i++ {
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if f.Flag(i) {
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s += string(i);
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}
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}
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if w, ok := f.Width(); ok {
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s += fmt.Sprintf("%d", w);
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}
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if p, ok := f.Precision(); ok {
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s += fmt.Sprintf(".%d", p);
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}
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s += string(c);
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io.WriteString(f, "["+s+"]");
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}
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type flagTest struct {
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in string;
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out string;
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}
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var flagtests = []flagTest {
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flagTest{ "%a", "[%a]" },
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flagTest{ "%-a", "[%-a]" },
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flagTest{ "%+a", "[%+a]" },
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flagTest{ "%#a", "[%#a]" },
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flagTest{ "% a", "[% a]" },
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flagTest{ "%0a", "[%0a]" },
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flagTest{ "%1.2a", "[%1.2a]" },
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flagTest{ "%-1.2a", "[%-1.2a]" },
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flagTest{ "%+1.2a", "[%+1.2a]" },
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flagTest{ "%-+1.2a", "[%+-1.2a]" },
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flagTest{ "%-+1.2abc", "[%+-1.2a]bc" },
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flagTest{ "%-1.2abc", "[%-1.2a]bc" },
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}
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func TestFlagParser(t *testing.T) {
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var flagprinter flagPrinter;
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for i := 0; i < len(flagtests); i++ {
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tt := flagtests[i];
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s := fmt.Sprintf(tt.in, &flagprinter);
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if s != tt.out {
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t.Errorf("Sprintf(%q, &flagprinter) => %q, want %q", tt.in, s, tt.out);
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}
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}
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}
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func TestStructPrinter(t *testing.T) {
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var s struct {
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a string;
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b string;
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c int;
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};
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s.a = "abc";
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s.b = "def";
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s.c = 123;
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type Test struct {
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fmt string;
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out string;
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}
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var tests = []Test {
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Test{ "%v", "{abc def 123}" },
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Test{ "%+v", "{a=abc b=def c=123}" },
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};
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for i := 0; i < len(tests); i++ {
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tt := tests[i];
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out := fmt.Sprintf(tt.fmt, s);
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if out != tt.out {
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t.Errorf("Sprintf(%q, &s) = %q, want %q", tt.fmt, out, tt.out);
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}
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}
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}
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func TestArrayPrinter(t *testing.T) {
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a := []int{1, 2, 3, 4, 5};
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want := "[1 2 3 4 5]";
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out := fmt.Sprintf("%v", a);
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if out != want {
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t.Errorf("Sprintf(%%v, array) = %q, want %q", out, want);
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}
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want = "&" + want;
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out = fmt.Sprintf("%v", &a);
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if out != want {
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t.Errorf("Sprintf(%%v, &array) = %q, want %q", out, want);
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}
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}
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