Unit Test Methods should support float numbers comparisons with EPSILON

VBSUnit is a VBScript Unit Testing Framework. Currently, it supports the following test methods:

• assert_equal expected, actual, message
• assert_not_equal expected, actual, message
• assert_match expected_pattern, actual, message regex
• assert_true asserted, message
• assert_false asserted, message

vbscript

However, for floating number, the direct comparisons are often considered as strict and wrong. For example,

a = 0.15 + 0.15
b = 0.2 + 0.1
If a = b Then
    WScript.Echo "Equal"
Else
    WScript.Echo "Not Equal"
End If

This will print “Not Equal”. The floating numbers should support a EPSILON constant (which is also known as the margin error).

So it becomes:

a = 0.15 + 0.15
b = 0.2 + 0.1
If Abs(a - b) <= 1e-4 Then
    WScript.Echo "Equal"
Else
    WScript.Echo "Not Equal"
End If

This should be reflected in the testing methods. I am proposing the methods assert_equal_eps and assert_not_equal_eps to be added to the Github repro.

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