github.com/matrixorigin/matrixone@v0.7.0/pkg/vectorize/bin/bin_test.go (about)

     1  // Copyright 2021 Matrix Origin
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package bin
    16  
    17  import (
    18  	"math"
    19  	"strconv"
    20  	"testing"
    21  
    22  	"github.com/stretchr/testify/require"
    23  )
    24  
    25  func TestCountBitLenForInt(t *testing.T) {
    26  	// count bits for unsigned int
    27  	// eg: 0(0), 1(1), 2(10), 3(11)
    28  	require.Equal(t, int64(1+1+2+2), Uint8BitLen([]uint8{0, 1, 2, 3}))
    29  	require.Equal(t, int64(3+3), Uint16BitLen([]uint16{4, 5}))
    30  	require.Equal(t, int64(3+3), Uint32BitLen([]uint32{6, 7}))
    31  	require.Equal(t, int64(4+4), Uint64BitLen([]uint64{8, 9}))
    32  
    33  	// count bits for signed int
    34  	// eg: -1(0xffffffffffffffff, 64bits)
    35  	// 127(1111111)
    36  	// -128(1111111111111111111111111111111111111111111111111111111110000000, 64bits)
    37  	require.Equal(t, int64(64+7+64), Int8BitLen([]int8{-1, 127, -128}))
    38  	require.Equal(t, int64(5+5), Int16BitLen([]int16{17, 18}))
    39  	require.Equal(t, int64(7+8), Int32BitLen([]int32{100, 200}))
    40  	require.Equal(t, int64(64+64+24+30), Int64BitLen([]int64{-1e7, -1e9, 1e7, 1e9}))
    41  }
    42  
    43  // due to differences between x86/arm, this TestCountBitLenForFloat function has some compatibility issues and therefore commented out
    44  /*
    45  func TestCountBitLenForFloat(t *testing.T) {
    46  	// count bits for float
    47  	// eg: 0.2(0), 1.8(1), 2.99(10), 3.14(11)
    48  	require.Equal(t, int64(1+1+2+2), Float32BitLen([]float32{.2, 1.8, 2.99, 3.14}))
    49  	require.Equal(t, int64(64+7+64), Float32BitLen([]float32{-1.99, 127.99, -128.89}))
    50  	require.Equal(t, int64(7+8), Float32BitLen([]float32{100.99, 200.99}))
    51  
    52  	require.Equal(t, int64(64+64+24+30), Float64BitLen([]float64{-1e7, -1e9, 1e7, 1e9}))
    53  	// Phi=1.61...(1), E=2.7(10), Pi=3.14(11)
    54  	require.Equal(t, int64(1+2+2), Float64BitLen([]float64{float64(math.Phi), float64(math.E), float64(math.Pi)}))
    55  }
    56  
    57  */
    58  
    59  func TestUnsignedIntToBinary(t *testing.T) {
    60  	cases := []uint64{0, 1, 2, 3, 127, 128}
    61  	ret := make([]string, len(cases))
    62  	ret = Uint64ToBinary(cases, ret)
    63  	for i, c := range cases {
    64  		require.Equal(t, strconv.FormatUint(c, 2), ret[i])
    65  	}
    66  }
    67  
    68  func TestIntToBinary(t *testing.T) {
    69  	cases := []int64{-1, 127, -128, 1e9, 1e7, -1e9}
    70  	ret := make([]string, len(cases))
    71  	ret = Int64ToBinary(cases, ret)
    72  	for i, c := range cases {
    73  		require.Equal(t, strconv.FormatUint(uint64(c), 2), ret[i])
    74  	}
    75  }
    76  
    77  func TestFloatToBinary(t *testing.T) {
    78  	cases := []float64{float64(math.Phi), float64(math.E), float64(math.Pi)}
    79  	ret := make([]string, len(cases))
    80  	ret = Float64ToBinary(cases, ret)
    81  	for i, c := range cases {
    82  		require.Equal(t, strconv.FormatUint(uint64(c), 2), ret[i])
    83  	}
    84  }
    85  
    86  func TestFormatUintToBinary(t *testing.T) {
    87  	tt := []struct {
    88  		num  uint64
    89  		want string
    90  	}{
    91  		{0, "0"},
    92  		{1, "1"},
    93  		{2, "10"},
    94  		{3, "11"},
    95  		{127, "1111111"},
    96  		{1e7, "100110001001011010000000"},
    97  		{1e9, "111011100110101100101000000000"},
    98  	}
    99  
   100  	for _, tc := range tt {
   101  		if got := uintToBinary(tc.num); got != tc.want {
   102  			t.Fatalf("uintToBinary(%d) = %s, want %s", tc.num, got, tc.want)
   103  		}
   104  	}
   105  }