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matlab.unittest.constraints.HasInf class

Package: matlab.unittest.constraints
Superclasses: matlab.unittest.constraints.BooleanConstraint

Test if array has infinite values


The matlab.unittest.constraints.HasInf class provides a constraint to test if an array has infinite values.




c = matlab.unittest.constraints.HasInf creates a constraint to test if an array has infinite values. The constraint is satisfied by a numeric array that has at least one infinite value.


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Test numeric arrays using the HasInf constraint.

First, import the classes used in this example.

import matlab.unittest.TestCase
import matlab.unittest.constraints.HasInf

Create a test case for interactive testing.

testCase = TestCase.forInteractiveUse;

Verify that Inf satisfies the HasInf constraint.

Verification passed.

Test if the vector [1 1 2 3 5 8 13] has infinite values. The test fails because all vector elements are finite.

testCase.verifyThat([1 1 2 3 5 8 13],HasInf)
Verification failed.
    Framework Diagnostic:
    HasInf failed.
    --> At least one element must be Inf or -Inf.
    Actual Value:
         1     1     2     3     5     8    13

Test [-Inf 5 NaN]. The test passes because the vector contains an infinite value.

testCase.verifyThat([-Inf 5 NaN],HasInf)
Verification passed.

Test if a complex number with an infinite imaginary part satisfies the constraint. The test passes.

Verification passed.

Test if the matrix [1 NaN; -Inf 3] does not have any infinite values. The test fails.

testCase.verifyThat([1 NaN; -Inf 3],~HasInf)
Verification failed.
    Framework Diagnostic:
    Negated HasInf failed.
    --> All elements must be finite or NaN.
        Failing indices:
    Actual Value:
         1   NaN
      -Inf     3

Version History

Introduced in R2013a