Package index

Core

Run mutation tests and define test plans.

muttest()

Run a mutation test

muttest_plan()

Create a plan for mutation testing

Mutators

Individual mutators — each defines one kind of code change.

Mutator

Mutator

operator()

Mutate a binary operator

boolean_literal()

Mutate a boolean literal

na_literal()

Mutate an NA or NULL literal

call_name()

Mutate a function call name

string_empty()

Mutate non-empty string literals to the empty string

string_fill()

Mutate the empty string literal to a placeholder string

numeric_increment()

Increment numeric literals

numeric_decrement()

Decrement numeric literals

index_increment()

Increment subscript indices

index_decrement()

Decrement subscript indices

negate_condition()

Negate the condition of if/while statements

remove_condition_negation()

Remove negation from the condition of if/while statements

remove_negation()

Remove logical negation

replace_return_value()

Replace the value in explicit return() calls

delete_statement()

Delete statements one at a time

Mutator presets

Ready-made collections of related mutators for common bug categories.

arithmetic_operators()

Arithmetic operator mutators

comparison_operators()

Comparison operator mutators

logical_operators()

Logical operator mutators

boolean_literals()

Boolean literal mutators

na_literals()

NA and NULL literal mutators

numeric_literals()

Numeric literal mutators

index_mutations()

Index mutation mutators

string_literals()

String literal mutators

condition_mutations()

Condition mutation mutators

Reporters

Control how results are displayed.

MutationReporter

Reporter for Mutation Testing

ProgressMutationReporter

Progress Reporter for Mutation Testing

JSONMutationReporter

JSON Reporter for Mutation Testing

MultiReporter

Combine Several Mutation Reporters

default_reporter()

Create a default reporter

report()

Build a source-annotated HTML report from a muttest JSON file

Strategies

Control how tests are run and source files are copied.

TestStrategy

TestStrategy interface

FileTestStrategy

Run tests matching the mutated source file name

FullTestStrategy

Run all tests for a mutant

CopyStrategy

CopyStrategy interface

PackageCopyStrategy

Package copy strategy

default_test_strategy()

Create a default run strategy

default_copy_strategy()

Create a default project copy strategy