Cohesion In Software Testing. It is observable as it is dealt with the actual written content. Basically cohesion is the internal glue that keeps the module together.
In contrast low cohesion is associated with undesirable traits such as being difficult to maintain test reuse or even understand. Cohesion is the measure of strength of the association of elements within a module. Cohesion is a measure of the degree to which the elements of the module are functionally related.
And the aim is always for functions that are strongly related and the expectation is for everything inside the module to be in connection with one another where the focus is on the task and this strong relations reduces modules minimize coupling.
Cohesion is all about things belonging together and with testing this starts with the obvious - group unit tests together group integration tests together etc. Cohesion Cohesion is defined as the degree to which all elements of a module class or component work together as a functional unit. Our hypothesis is that a package with low cohesion is difficult to test. Coherence is a qualitative property.