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本文主要研究一下gost的DeltaCompare
DeltaComparegost/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對比兩個float型別的差值是否小於等於指定的delta
例項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))}
小結gost的提供了DeltaCompareFloat32、DeltaCompareFloat64方法用於對比兩個float型別的差值是否小於等於指定的delta。
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