package util import ( "encoding/json" "math" "strconv" "testing" "github.com/go-yaml/yaml" "github.com/nspcc-dev/neo-go/pkg/io" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" ) func TestFixed8FromInt64(t *testing.T) { values := []int64{9000, 100000000, 5, 10945, -42} for _, val := range values { assert.Equal(t, Fixed8(val*decimals), Fixed8FromInt64(val)) assert.Equal(t, val, Fixed8FromInt64(val).IntegralValue()) assert.Equal(t, int32(0), Fixed8FromInt64(val).FractionalValue()) } } func TestFixed8Add(t *testing.T) { a := Fixed8FromInt64(1) b := Fixed8FromInt64(2) c := a.Add(b) expected := int64(3) assert.Equal(t, strconv.FormatInt(expected, 10), c.String()) } func TestFixed8Sub(t *testing.T) { a := Fixed8FromInt64(42) b := Fixed8FromInt64(34) c := a.Sub(b) assert.Equal(t, int64(8), c.IntegralValue()) assert.Equal(t, int32(0), c.FractionalValue()) } func TestFixed8FromFloat(t *testing.T) { inputs := []float64{12.98, 23.87654333, 100.654322, 456789.12345665, -3.14159265} for _, val := range inputs { assert.Equal(t, Fixed8(val*decimals), Fixed8FromFloat(val)) assert.Equal(t, val, Fixed8FromFloat(val).FloatValue()) trunc := math.Trunc(val) rem := (val - trunc) * decimals assert.Equal(t, int64(trunc), Fixed8FromFloat(val).IntegralValue()) assert.Equal(t, int32(math.Round(rem)), Fixed8FromFloat(val).FractionalValue()) } } func TestFixed8FromString(t *testing.T) { // Fixed8FromString works correctly with integers ivalues := []string{"9000", "100000000", "5", "10945", "20.45", "0.00000001", "-42"} for _, val := range ivalues { n, err := Fixed8FromString(val) assert.Nil(t, err) assert.Equal(t, val, n.String()) } // Fixed8FromString parses number with maximal precision val := "123456789.12345678" n, err := Fixed8FromString(val) assert.Nil(t, err) assert.Equal(t, Fixed8(12345678912345678), n) // Fixed8FromString parses number with non-maximal precision val = "901.2341" n, err = Fixed8FromString(val) assert.Nil(t, err) assert.Equal(t, Fixed8(90123410000), n) // Fixed8FromString with errors val = "90n1" _, err = Fixed8FromString(val) assert.Error(t, err) val = "90.1s" _, err = Fixed8FromString(val) assert.Error(t, err) } func TestFixedNFromString(t *testing.T) { val := "123.456" num, err := FixedNFromString(val, 3) require.NoError(t, err) require.EqualValues(t, 123456, num) num, err = FixedNFromString(val, 4) require.NoError(t, err) require.EqualValues(t, 1234560, num) _, err = FixedNFromString(val, 2) require.Error(t, err) } func TestSatoshi(t *testing.T) { satoshif8 := Satoshi() assert.Equal(t, "0.00000001", satoshif8.String()) } func TestFixed8UnmarshalJSON(t *testing.T) { var testCases = []float64{ 123.45, -123.45, } for _, fl := range testCases { str := strconv.FormatFloat(fl, 'g', -1, 64) expected, _ := Fixed8FromString(str) // UnmarshalJSON should decode floats var u1 Fixed8 s, _ := json.Marshal(fl) assert.Nil(t, json.Unmarshal(s, &u1)) assert.Equal(t, expected, u1) // UnmarshalJSON should decode strings var u2 Fixed8 s, _ = json.Marshal(str) assert.Nil(t, json.Unmarshal(s, &u2)) assert.Equal(t, expected, u2) } errorCases := []string{ `"123.u"`, "13.j", } for _, tc := range errorCases { var u Fixed8 assert.Error(t, u.UnmarshalJSON([]byte(tc))) } } func TestFixed8_MarshalJSON(t *testing.T) { u, err := Fixed8FromString("123.4") assert.NoError(t, err) s, err := json.Marshal(u) assert.NoError(t, err) assert.Equal(t, []byte(`"123.4"`), s) } func TestFixed8_UnmarshalYAML(t *testing.T) { u, err := Fixed8FromString("123.4") assert.NoError(t, err) s, err := yaml.Marshal(u) assert.NoError(t, err) assert.Equal(t, []byte("\"123.4\"\n"), s) // yaml marshaler inserts LF at the end var f Fixed8 assert.NoError(t, yaml.Unmarshal([]byte(`"123.4"`), &f)) assert.Equal(t, u, f) } func TestFixed8_Arith(t *testing.T) { u1 := Fixed8FromInt64(3) u2 := Fixed8FromInt64(8) assert.True(t, u1.LessThan(u2)) assert.True(t, u2.GreaterThan(u1)) assert.True(t, u1.Equal(u1)) assert.NotZero(t, u1.CompareTo(u2)) assert.Zero(t, u1.CompareTo(u1)) assert.EqualValues(t, Fixed8(2), u2.Div(3)) } func TestFixed8_Serializable(t *testing.T) { a := Fixed8(0x0102030405060708) w := io.NewBufBinWriter() a.EncodeBinary(w.BinWriter) require.NoError(t, w.Err) var b Fixed8 r := io.NewBinReaderFromBuf(w.Bytes()) b.DecodeBinary(r) require.Equal(t, a, b) }