github.com/supragya/TendermintConnector@v0.0.0-20210619045051-113e32b84fb1/chains/tm34/libs/math/fraction_test.go (about)

     1  package math
     2  
     3  import (
     4  	"testing"
     5  
     6  	"github.com/stretchr/testify/assert"
     7  )
     8  
     9  func TestParseFraction(t *testing.T) {
    10  
    11  	testCases := []struct {
    12  		f   string
    13  		exp Fraction
    14  		err bool
    15  	}{
    16  		{
    17  			f:   "2/3",
    18  			exp: Fraction{2, 3},
    19  			err: false,
    20  		},
    21  		{
    22  			f:   "15/5",
    23  			exp: Fraction{15, 5},
    24  			err: false,
    25  		},
    26  		// test divide by zero error
    27  		{
    28  			f:   "2/0",
    29  			exp: Fraction{},
    30  			err: true,
    31  		},
    32  		// test negative
    33  		{
    34  			f:   "-1/2",
    35  			exp: Fraction{},
    36  			err: true,
    37  		},
    38  		{
    39  			f:   "1/-2",
    40  			exp: Fraction{},
    41  			err: true,
    42  		},
    43  		// test overflow
    44  		{
    45  			f:   "9223372036854775808/2",
    46  			exp: Fraction{},
    47  			err: true,
    48  		},
    49  		{
    50  			f:   "2/9223372036854775808",
    51  			exp: Fraction{},
    52  			err: true,
    53  		},
    54  		{
    55  			f:   "2/3/4",
    56  			exp: Fraction{},
    57  			err: true,
    58  		},
    59  		{
    60  			f:   "123",
    61  			exp: Fraction{},
    62  			err: true,
    63  		},
    64  		{
    65  			f:   "1a2/4",
    66  			exp: Fraction{},
    67  			err: true,
    68  		},
    69  		{
    70  			f:   "1/3bc4",
    71  			exp: Fraction{},
    72  			err: true,
    73  		},
    74  	}
    75  
    76  	for idx, tc := range testCases {
    77  		output, err := ParseFraction(tc.f)
    78  		if tc.err {
    79  			assert.Error(t, err, idx)
    80  		} else {
    81  			assert.NoError(t, err, idx)
    82  		}
    83  		assert.Equal(t, tc.exp, output, idx)
    84  	}
    85  
    86  }