ProgressMutationReporter: Progress Reporter for Mutation Testing

In muttest: Mutation Testing

Progress Reporter for Mutation Testing

Description

A reporter that displays a progress indicator for mutation tests. It provides real-time feedback on which mutants are being tested and whether they were killed by tests.

Super class

muttest::MutationReporter -> ProgressMutationReporter

Public fields

start_time

Time when testing started (for duration calculation)

min_time

Minimum test duration to display timing information

col_config

List of column configuration for report formatting

survived_detail

Controls how survived mutants are reported (summary, none)

survived_mutants

List to store details of survived mutants for summary reporting

Methods

Public methods

• ProgressMutationReporter$format_column()

• ProgressMutationReporter$fmt_h()

• ProgressMutationReporter$fmt_r()

• ProgressMutationReporter$new()

• ProgressMutationReporter$start_reporter()

• ProgressMutationReporter$add_result()

• ProgressMutationReporter$update()

• ProgressMutationReporter$end_file()

• ProgressMutationReporter$cr()

• ProgressMutationReporter$end_reporter()

• ProgressMutationReporter$print()

• ProgressMutationReporter$clone()

Inherited methods

• muttest::MutationReporter$cat_line()
• muttest::MutationReporter$cat_tight()
• muttest::MutationReporter$end_mutator()
• muttest::MutationReporter$get_score()
• muttest::MutationReporter$rule()
• muttest::MutationReporter$start_file()
• muttest::MutationReporter$start_mutator()

---

Method format_column()

Format a column with specified padding and width

Usage

ProgressMutationReporter$format_column(text, col_name, colorize = NULL)

Arguments

text

Text to format

col_name

Column name to use configuration from

colorize

Optional function to color the text

---

Method fmt_h()

Format the header of the report

Usage

ProgressMutationReporter$fmt_h()

---

Method fmt_r()

Format a row of the report

Usage

ProgressMutationReporter$fmt_r(status, k, s, e, t, score, mutator, file)

Arguments

status

Status symbol (e.g., tick or cross)

k

Number of killed mutations

s

Number of survived mutations

e

Number of errors

t

Total number of mutations

score

Score percentage

mutator

The mutator used

file

The file being tested

Returns

Formatted row string

---

Method new()

Initialize a new progress reporter

Usage

ProgressMutationReporter$new(
  test_reporter = "silent",
  min_time = 1,
  file = stdout(),
  survived_detail = c("summary", "none")
)

Arguments

test_reporter

Reporter to use for testthat::test_dir

min_time

Minimum time to show elapsed time (default: 1s)

file

Output destination (default: stdout)

survived_detail

Controls how survived mutants are reported. One of "summary" (default) or "none".

---

Method start_reporter()

Start reporter

Usage

ProgressMutationReporter$start_reporter(plan = NULL)

Arguments

plan

The complete mutation plan

---

Method add_result()

Add a mutation test result

Usage

ProgressMutationReporter$add_result(
  plan,
  killed,
  survived,
  errors,
  error = NULL,
  original_code = NULL,
  mutated_code = NULL
)

Arguments

plan

Current testing plan. See muttest_plan().

killed

Whether the mutation was killed by tests

survived

Number of survived mutations

errors

Number of errors encountered

error

Optional error condition from a failed run

original_code

Original source lines before mutation

mutated_code

Mutated source lines

---

Method update()

Update status spinner (for long-running operations)

Usage

ProgressMutationReporter$update(force = FALSE)

Arguments

force

Force update even if interval hasn't elapsed

---

Method end_file()

End testing current file

Usage

ProgressMutationReporter$end_file()

---

Method cr()

Carriage return if dynamic, newline otherwise

Usage

ProgressMutationReporter$cr()

---

Method end_reporter()

End reporter with detailed summary

Usage

ProgressMutationReporter$end_reporter()

---

Method print()

Print the mutation test result with survived diffs

Usage

ProgressMutationReporter$print()

---

Method clone()

The objects of this class are cloneable with this method.

Usage

ProgressMutationReporter$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

See Also

Other MutationReporter: MutationReporter, default_reporter()

muttest documentation built on May 14, 2026, 5:10 p.m.