关于golang:聊聊gost的DeltaCompare

序

本文次要钻研一下gost的DeltaCompare

DeltaCompare

gost/math/compare.go

// equivalent to math.Abs(expected - actual) <= deltafunc DeltaCompareFloat64(expected float64, actual float64, delta float64) bool {    if expected > actual {        return expected-actual <= delta    }    return actual-expected <= delta}func DeltaCompareFloat32(expected float32, actual float32, delta float32) bool {    if expected > actual {        return expected-actual <= delta    }    return actual-expected <= delta}

DeltaCompareFloat64及DeltaCompareFloat32比照两个float类型的差值是否小于等于指定的delta

实例

gost/math/compare_test.go

func TestFloat64(t *testing.T) {    assert.True(t, DeltaCompareFloat64(12.3334, 12.3344, 0.01))    assert.True(t, DeltaCompareFloat64(12.3334, 12.32981, 0.01))    assert.False(t, DeltaCompareFloat64(12.3334, 12.0325, 0.01))}func TestCompareFloat32(t *testing.T) {    assert.True(t, DeltaCompareFloat32(12.3334, 12.3344, 0.01))    assert.True(t, DeltaCompareFloat32(12.3334, 12.32981, 0.01))    assert.False(t, DeltaCompareFloat64(12.3334, 12.0325, 0.01))}

小结

gost的提供了DeltaCompareFloat32、DeltaCompareFloat64办法用于比照两个float类型的差值是否小于等于指定的delta。

doc

• gost