The spelling of the phrase "code coverage" uses the phonetic transcription /koʊd ˈkʌvərɪdʒ/. This term is often used in software development to refer to the percentage of code that is exercised by automated tests. The first syllable, "code," uses the long o sound and ends with a consonant sound. The second syllable, "coverage," uses the short u sound and ends with a schwa sound, indicating a reduced or unstressed vowel. Together, the phrase emphasizes the stress on the first syllable and the unstressed ending of the second syllable.
Code coverage is a metric utilized in software testing to evaluate the proportion of source code that are executed during the testing process. It measures the degree to which a given set of test cases exercises or executes the code under test. Code coverage helps assess the effectiveness and thoroughness of the testing effort by indicating which parts of the codebase have been tested and to what extent.
Code coverage is typically measured as a percentage, indicating the ratio of code that has been tested to the total amount of code in a software system. This measurement can be achieved using various techniques, such as statement coverage, branch coverage, and path coverage. Statement coverage determines the number of statements executed during testing, while branch coverage determines the number of decision points covered. Path coverage goes further by analyzing all possible execution paths within the code.
Higher code coverage percentages generally indicate a higher level of confidence in the quality and reliability of the software. However, it is important to note that a high code coverage does not necessarily guarantee that the software is completely free from defects, as it is possible to have untested scenarios or undetectable errors.
Code coverage is an essential metric used by developers and quality assurance teams to guide the testing process and identify areas of code that require more comprehensive testing. It helps in increasing test coverage, uncovering untested code, and improving overall code quality and reliability in software development.
The term "code coverage" is formed by combining the words "code" and "coverage". Here is the etymology of each word:
1. Code: The word "code" originated from the Latin term "codex" which referred to a system of laws or rules. Over time, it evolved to encompass various meanings related to a system of symbols or instructions used to represent information or accomplish specific tasks. In the context of computer programming, "code" refers to a set of instructions written in a programming language that defines how software should function.
2. Coverage: The term "coverage" has its roots in the Old French word "covrir" meaning "to cover". It entered the English language in the 14th century with the same meaning. It is used to describe the extent to which something is covered or the scope or range of a particular subject.