ctoa_test.go

Documentation: strconv

		 1  // Copyright 2020 The Go Authors. All rights reserved.
		 2  // Use of this source code is governed by a BSD-style
		 3  // license that can be found in the LICENSE file.
		 4  
		 5  package strconv_test
		 6  
		 7  import (
		 8  	. "strconv"
		 9  	"testing"
		10  )
		11  
		12  func TestFormatComplex(t *testing.T) {
		13  	tests := []struct {
		14  		c			 complex128
		15  		fmt		 byte
		16  		prec		int
		17  		bitSize int
		18  		out		 string
		19  	}{
		20  		// a variety of signs
		21  		{1 + 2i, 'g', -1, 128, "(1+2i)"},
		22  		{3 - 4i, 'g', -1, 128, "(3-4i)"},
		23  		{-5 + 6i, 'g', -1, 128, "(-5+6i)"},
		24  		{-7 - 8i, 'g', -1, 128, "(-7-8i)"},
		25  
		26  		// test that fmt and prec are working
		27  		{3.14159 + 0.00123i, 'e', 3, 128, "(3.142e+00+1.230e-03i)"},
		28  		{3.14159 + 0.00123i, 'f', 3, 128, "(3.142+0.001i)"},
		29  		{3.14159 + 0.00123i, 'g', 3, 128, "(3.14+0.00123i)"},
		30  
		31  		// ensure bitSize rounding is working
		32  		{1.2345678901234567 + 9.876543210987654i, 'f', -1, 128, "(1.2345678901234567+9.876543210987654i)"},
		33  		{1.2345678901234567 + 9.876543210987654i, 'f', -1, 64, "(1.2345679+9.876543i)"},
		34  
		35  		// other cases are handled by FormatFloat tests
		36  	}
		37  	for _, test := range tests {
		38  		out := FormatComplex(test.c, test.fmt, test.prec, test.bitSize)
		39  		if out != test.out {
		40  			t.Fatalf("FormatComplex(%v, %q, %d, %d) = %q; want %q",
		41  				test.c, test.fmt, test.prec, test.bitSize, out, test.out)
		42  		}
		43  	}
		44  }
		45  
		46  func TestFormatComplexInvalidBitSize(t *testing.T) {
		47  	defer func() {
		48  		if r := recover(); r == nil {
		49  			t.Fatalf("expected panic due to invalid bitSize")
		50  		}
		51  	}()
		52  	_ = FormatComplex(1+2i, 'g', -1, 100)
		53  }
		54
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