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%TBUFFER Unit tests for arrow.buffer.Buffer
% Licensed to the Apache Software Foundation (ASF) under one or more
% contributor license agreements. See the NOTICE file distributed with
% this work for additional information regarding copyright ownership.
% The ASF licenses this file to you under the Apache License, Version
% 2.0 (the "License"); you may not use this file except in compliance
% with the License. You may obtain a copy of the License at
%
% http://www.apache.org/licenses/LICENSE-2.0
%
% Unless required by applicable law or agreed to in writing, software
% distributed under the License is distributed on an "AS IS" BASIS,
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
% implied. See the License for the specific language governing
% permissions and limitations under the License.
classdef tBuffer < matlab.unittest.TestCase
methods (Test)
function Smoke(testCase)
import arrow.buffer.Buffer
source = uint8([1 2 3]);
buffer = Buffer.fromMATLAB(source);
testCase.verifyInstanceOf(buffer, "arrow.buffer.Buffer");
end
function fromMATLABUInt8Scalar(testCase)
% Verifies fromMATLAB returns the expected arrow.buffer.Buffer
% instance when given a scalar uint8 value.
import arrow.buffer.Buffer
source = uint8(20);
buffer = Buffer.fromMATLAB(source);
testCase.verifyEqual(buffer.NumBytes, int64(1));
values = toMATLAB(buffer);
testCase.verifyEqual(values, source);
end
function fromMATLABFromEmptyUInt8(testCase)
% Verifies fromMATLAB returns the expected arrow.buffer.Buffer
% value when given an empty uint8 array.
import arrow.buffer.Buffer
% Create buffer from 0x0 uint8 array
source = uint8.empty(0, 0);
buffer = Buffer.fromMATLAB(source);
testCase.verifyEqual(buffer.NumBytes, int64(0));
values = toMATLAB(buffer);
testCase.verifyEqual(values, uint8.empty(0, 1));
% Create buffer from 0x1 uint8 array
source = uint8.empty(0, 1);
buffer = Buffer.fromMATLAB(source);
testCase.verifyEqual(buffer.NumBytes, int64(0));
values = toMATLAB(buffer);
testCase.verifyEqual(values, uint8.empty(0, 1));
% Create buffer from 1x0 uint8 array
source = uint8.empty(1, 0);
buffer = Buffer.fromMATLAB(source);
testCase.verifyEqual(buffer.NumBytes, int64(0));
values = toMATLAB(buffer);
testCase.verifyEqual(values, uint8.empty(0, 1));
end
function fromMATLABUInt8Vector(testCase)
% Verifies fromMATLAB returns the expected arrow.buffer.Buffer
% value when given a uint8 vector.
import arrow.buffer.Buffer
% Create buffer from 1x3 uint8 array
source = uint8([3 9 27]);
buffer = Buffer.fromMATLAB(source);
testCase.verifyEqual(buffer.NumBytes, int64(3));
values = toMATLAB(buffer);
testCase.verifyEqual(values, uint8([3 9 27]'));
% Create buffer from 3x1 uint8 array
source = uint8([3 9 27]');
buffer = Buffer.fromMATLAB(source);
testCase.verifyEqual(buffer.NumBytes, int64(3));
values = toMATLAB(buffer);
testCase.verifyEqual(values, uint8([3 9 27]'));
end
function fromMATLABDoubleVector(testCase)
% Verifies fromMATLAB returns the expected arrow.buffer.Buffer
% value when given a double vector.
import arrow.buffer.Buffer
% Create buffer from 1x3 double array
source = [3 9 27];
buffer = Buffer.fromMATLAB(source);
% Since the input vector is a 1x3 double (i.e. 64-bit floating
% point value) array - each of the 3 elements takes up 8 bytes
% (3 elements * 8 bytes per element = 24 bytes).
testCase.verifyEqual(buffer.NumBytes, int64(24));
values = toMATLAB(buffer);
expected = typecast(source', "uint8");
testCase.verifyEqual(values, expected);
testCase.verifyEqual(typecast(values, "double"), source');
% Create buffer from 3x1 double array
source = [3 9 27]';
buffer = Buffer.fromMATLAB(source);
testCase.verifyEqual(buffer.NumBytes, int64(24));
values = toMATLAB(buffer);
expected = typecast(source, "uint8");
testCase.verifyEqual(values, expected);
testCase.verifyEqual(typecast(values, "double"), source);
end
function fromMATLABNonNumericError(testCase)
% Verify fromMATLAB throws an error if given a non-numeric
% array as input.
import arrow.buffer.Buffer
fcn = @() Buffer.fromMATLAB(true);
testCase.verifyError(fcn, "MATLAB:validators:mustBeNumeric");
fcn = @() Buffer.fromMATLAB("A");
testCase.verifyError(fcn, "MATLAB:validators:mustBeNumeric");
fcn = @() Buffer.fromMATLAB(datetime(2023, 1, 1));
testCase.verifyError(fcn, "MATLAB:validators:mustBeNumeric");
end
function fromMATLABNonRealError(testCase)
% Verify fromMATLAB throws an error if given a complex
% numeric array as input.
import arrow.buffer.Buffer
fcn = @() Buffer.fromMATLAB(10 + 3i);
testCase.verifyError(fcn, "MATLAB:validators:mustBeReal");
end
function fromMATLABNonSparseError(testCase)
% Verify fromMATLAB throws an error if given a sparse
% numeric array as input.
import arrow.buffer.Buffer
fcn = @() Buffer.fromMATLAB(sparse(ones([5 1])));
testCase.verifyError(fcn, "MATLAB:validators:mustBeNonsparse");
end
function NumBytesNoSetter(testCase)
% Verifies the NumBytes property is not settable.
import arrow.buffer.Buffer
buffer = Buffer.fromMATLAB([1 2 3]);
fcn = @() setfield(buffer, "NumBytes", int64(1));
testCase.verifyError(fcn, "MATLAB:class:SetProhibited");
end
function IsEqualTrue(testCase)
% Verifies two buffers are considered equal if
% 1. They have the same size (NumBytes)
% 2. They contain the same bytes
import arrow.buffer.Buffer
% Compare two non-empty buffers
buffer1 = Buffer.fromMATLAB([1 2 3]);
buffer2 = Buffer.fromMATLAB([1 2 3]);
testCase.verifyTrue(isequal(buffer1, buffer2));
% Compare two buffers, one of which was created from a double
% array and the other created from a uint8 array. However, both
% arrays have the same bit pattern.
data = zeros([1 24], "uint8");
data([7 8 16 23 24]) = [240 63 64 8 64];
buffer3 = Buffer.fromMATLAB(data);
testCase.verifyTrue(isequal(buffer1, buffer3));
% Compare two empty buffers
buffer4 = Buffer.fromMATLAB([]);
buffer5 = Buffer.fromMATLAB([]);
testCase.verifyTrue(isequal(buffer4, buffer5));
% Compare more than two buffers
testCase.verifyTrue(isequal(buffer1, buffer2, buffer3));
end
function IsEqualFalse(testCase)
% Verifies two buffers are not considered equal if
% 1. They do not have the same size (NumBytes) OR
% 2. They do not contain the same bytes
import arrow.buffer.Buffer
buffer1 = Buffer.fromMATLAB([1 2 3]);
buffer2 = Buffer.fromMATLAB([1 3 2]);
buffer3 = Buffer.fromMATLAB([1 2 3 4]);
testCase.verifyFalse(isequal(buffer1, buffer2));
testCase.verifyFalse(isequal(buffer1, buffer3));
testCase.verifyFalse(isequal(buffer1, buffer2, buffer3));
% Compare a buffer to a string
testCase.verifyFalse(isequal(buffer1, "A"));
end
end
end
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