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%TSTRING Unit tests for arrow.internal.validate.index.string
% 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 tString < matlab.unittest.TestCase
methods(Test)
function MissingStringError(testCase)
% Verify string() throws an error whose identifier is
% "arrow:badsubscript:MissingString" if the index array
% provided has missing string values.
import arrow.internal.validate.*
errid = "arrow:badsubscript:MissingString";
fcn = @() index.string(string(missing));
testCase.verifyError(fcn, errid);
fcn = @() index.string(["A" missing "B"]);
testCase.verifyError(fcn, errid);
end
function ZeroLengthText(testCase)
% Verify string() does not throw an error if the index array
% provided has zero length text values.
import arrow.internal.validate.*
idx = index.string("");
testCase.verifyEqual(idx, "");
idx = index.string(["A" "" "B"]);
testCase.verifyEqual(idx, ["A"; ""; "B"]);
end
function ValidStringIndices(testCase)
% Verify string() returns the expected string array if given
% a valid string, char, or cellstr as the index array.
import arrow.internal.validate.*
idx = index.string("A");
testCase.verifyEqual(idx, "A");
idx = index.string(["A", "B"]);
testCase.verifyEqual(idx, ["A"; "B"]);
idx = index.string('ABC');
testCase.verifyEqual(idx, "ABC");
idx = index.string(['ABC'; 'DEF']);
testCase.verifyEqual(idx, "ADBECF");
idx = index.string({'Var1'});
testCase.verifyEqual(idx, "Var1");
idx = index.string({'Var1', 'A'});
testCase.verifyEqual(idx, ["Var1"; "A"]);
end
function ErrorIfNonString(testCase)
% Verify string() throws an error whose identifier is
% "arrow:badsubscript:NonString" if neither a string array,
% char array, nor cellstr array was provided as the index.
import arrow.internal.validate.*
fcn = @() index.string(1);
testCase.verifyError(fcn, "arrow:badsubscript:NonString");
end
function OutputShape(testCase)
% Verify string() always returns a column vector.
import arrow.internal.validate.*
% Provide a 2x2 matrix
original = ["A" "B"; "C" "D"];
expected = ["A" "C" "B" "D"]';
actual = index.string(original);
testCase.verifyEqual(actual, expected);
% Provide a 1x3 vector
original = ["A" "B" "C"];
expected = ["A" "B" "C"]';
actual = index.string(original);
testCase.verifyEqual(actual, expected);
% Provide a 3x1 vector
original = ["A" "B" "C"]';
expected = ["A" "B" "C"]';
actual = index.string(original);
testCase.verifyEqual(actual, expected);
% Provide a 2x2x2 N-dimensional array
original = reshape(string(char(65:72)'), 2, 2, 2);
expected = string(char(65:72)');
actual = index.string(original);
testCase.verifyEqual(actual, expected);
end
function AllowNonScalarTrue(testCase)
% Verify string() behaves as expected provided
% AllowNonScalar=true.
import arrow.internal.validate.*
% Provide a nonscalar string array
original = ["A", "B", "C"];
expected = ["A", "B", "C"]';
actual = index.string(original, AllowNonScalar=true);
testCase.verifyEqual(actual, expected);
% Provide a scalar string array
original = "A";
expected = "A";
actual = index.string(original, AllowNonScalar=true);
testCase.verifyEqual(actual, expected);
end
function AllowNonScalarFalse(testCase)
% Verify string() behaves as expected when provided
% AllowNonScalar=false.
import arrow.internal.validate.*
% Should throw an error if provided a nonscalar string array
original = ["A", "B", "C"];
fcn = @() index.string(original, AllowNonScalar=false);
testCase.verifyError(fcn, "arrow:badsubscript:NonScalar");
% Should not throw an error if provided a scalar string array
original = "A";
expected = "A";
actual = index.string(original, AllowNonScalar=false);
testCase.verifyEqual(actual, expected);
% Should not throw an error if provided a character row vector
original = 'ABC';
expected = "ABC";
actual = index.string(original, AllowNonScalar=false);
testCase.verifyEqual(actual, expected);
end
end
end
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