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matlab.unittest.constraints.IsFinite class

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

Test if array elements are finite values

Description

The matlab.unittest.constraints.IsFinite class provides a constraint to test if elements of an array are finite values.

Creation

Description

example

c = matlab.unittest.constraints.IsFinite creates a constraint to test if all elements of an array are finite values. The constraint is satisfied by a numeric array that does not contain any infinite or NaN values.

Examples

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Test numeric arrays using the IsFinite constraint.

First, import the classes used in this example.

import matlab.unittest.TestCase
import matlab.unittest.constraints.IsFinite

Create a test case for interactive testing.

testCase = TestCase.forInteractiveUse;

Verify that the value 5 is finite.

testCase.verifyThat(5,IsFinite)
Verification passed.

Test if the vector [1 1 2 3 5 8 13] satisfies the IsFinite constraint. The test passes because all vector elements are finite.

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

Test [-Inf 5 NaN]. The test fails because the vector contains an infinite value as well as a NaN value.

testCase.verifyThat([-Inf 5 NaN],IsFinite)
Verification failed.
    ---------------------
    Framework Diagnostic:
    ---------------------
    IsFinite failed.
    --> All elements must be finite-valued.
        Failing indices:
            [1 3]
    
    Actual Value:
      -Inf     5   NaN

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

testCase.verifyThat(3+1i/0,IsFinite)
Verification failed.
    ---------------------
    Framework Diagnostic:
    ---------------------
    IsFinite failed.
    --> The value must be finite.
    
    Actual Value:
      3.000000000000000 +               Infi

Verify that the matrix [1 NaN; -Inf 3] is not finite.

testCase.verifyThat([1 NaN; -Inf 3],~IsFinite)
Verification passed.

Version History

Introduced in R2013a