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matlab.unittest.constraints.IsEmpty Class

Namespace: matlab.unittest.constraints
Superclasses: matlab.unittest.constraints.BooleanConstraint

Test if value is empty


The matlab.unittest.constraints.IsEmpty class provides a constraint to test if a value is empty.




c = matlab.unittest.constraints.IsEmpty creates a constraint to test if a value is empty. The constraint is satisfied by an array that has at least one dimension length equal to zero.


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Test values using the IsEmpty constraint.

First, import the classes used in this example.

import matlab.unittest.TestCase
import matlab.unittest.TestSuite
import matlab.unittest.constraints.IsEmpty

Create a test case for interactive testing.

testCase = TestCase.forInteractiveUse;

Verify that an empty character vector satisfies the IsEmpty constraint.

Verification passed.

Verify that an array with a zero dimension length is empty. The test passes.

Verification passed.

Verify that the vector [1 1 2 3 5 8 13] is not empty. The test passes.

testCase.verifyThat([1 1 2 3 5 8 13],~IsEmpty)
Verification passed.

Test a cell array of empty numeric arrays. The test fails because the cell array is not empty.

Verification failed.
    Framework Diagnostic:
    IsEmpty failed.
    --> The value must be empty.
    --> The value has a size of [1  3].
    Actual Value:
      1×3 cell array
        {0×0 double}    {0×0 double}    {0×0 double}

Test an empty test suite. The test passes.

Verification passed.

Version History

Introduced in R2013a