verifyNotEmpty

Class: matlab.unittest.qualifications.Verifiable
Package: matlab.unittest.qualifications

Verify value is not empty

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Syntax

verifyNotEmpty(verifiable,actual)
verifyNotEmpty(___,diagnostic)

Description

verifyNotEmpty(verifiable,actual) verifies that actual is a non-empty MATLAB® value.

verifyNotEmpty(___,diagnostic) also displays the diagnostic information in diagnostic upon a failure.

Input Arguments

verifiable

The matlab.unittest.TestCase instance which is used to pass or fail the verification in conjunction with the test running framework.

actual

The value to test.

diagnostic

Diagnostic information related to the qualification, specified as one of the following:

  • string array

  • character array

  • function handle

  • matlab.unittest.diagnostics.Diagnostic object

Diagnostic values can be nonscalar. For more information, see matlab.unittest.diagnostics.Diagnostic.

Examples

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Create a TestCase object.

testCase = matlab.unittest.TestCase.forInteractiveUse;
verifyNotEmpty(testCase, '');

Interactive verification failed.

---------------------
Framework Diagnostic:
---------------------
verifyNotEmpty failed.
--> The value must not be empty.
--> The value has a size of [0  0].

Actual char:
      0×0 empty char array

Test failed.

An array with any zero dimension is empty.

Test array [2 3].

testCase = matlab.unittest.TestCase.forInteractiveUse;
verifyNotEmpty(testCase, [2 3]);
Interactive verification passed.

Test array with a zero dimension.

verifyNotEmpty(testCase, ones(2, 5, 0, 3));

Interactive verification failed.

---------------------
Framework Diagnostic:
---------------------
verifyNotEmpty failed.
--> The value must not be empty.
--> The value has a size of [2  5  0  3].

Actual Value:
       Empty array: 2-by-5-by-0-by-3

Test failed.

A cell array of empty arrays is not empty.

testCase = matlab.unittest.TestCase.forInteractiveUse;
verifyNotEmpty(testCase, {[], [], []}, '');

Interactive verification passed.

Test an empty object, emptyTestSuite.

emptyTestSuite = matlab.unittest.TestSuite.empty;
testCase = matlab.unittest.TestCase.forInteractiveUse;
verifyNotEmpty(testCase, emptyTestSuite);
Interactive verification failed.

---------------------
Framework Diagnostic:
---------------------
verifyNotEmpty failed.
--> The value must not be empty.
--> The value has a size of [0  0].

Actual Value:
      0x0 TestCase array with no properties.

Test failed.

Tips

  • This method is functionally equivalent to:

    import matlab.unittest.constraints.IsEmpty;
verifiable.verifyThat(actual, ~IsEmpty());

    There exists more functionality when using the IsEmpty constraint directly via verifyThat.

  • Use verification qualifications to produce and record failures without throwing an exception. Since verifications do not throw exceptions, all test content runs to completion even when verification failures occur. Typically verifications are the primary qualification for a unit test since they typically do not require an early exit from the test. Use other qualification types to test for violation of preconditions or incorrect test setup. Alternatively,

    • Use assumption qualifications to ensure that the test environment meets preconditions that otherwise do not result in a test failure. Assumption failures result in filtered tests, and the testing framework marks the tests as Incomplete. For more information, see matlab.unittest.qualifications.Assumable.

    • Use assertion qualifications when the failure condition invalidates the remainder of the current test content, but does not prevent proper execution of subsequent test methods. A failure at the assertion point renders the current test method as failed and incomplete. For more information, see matlab.unittest.qualifications.Assertable.

    • Use fatal assertion qualifications to abort the test session upon failure. These qualifications are useful when the failure mode is so fundamental that there is no point in continuing testing. These qualifications are also useful when fixture teardown does not restore the MATLAB state correctly and it is preferable to abort testing and start a fresh session. For more information, see matlab.unittest.qualifications.FatalAssertable.

See Also

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Topics

Introduced in R2013a

MATLAB Documentation

Support