Version: 2.1.4
A testing library for Lua scripts.
For a usage example, please see the test script for utf8Tools.
Creates a new Tester instance.
local test = errTest.new([name], [verbosity])
-
name: (string) An optional test name. -
verbosity: (number) The test's output verbosity level when printing to the terminal.
Returns: The Tester object.
Notes:
- Here is a chart of the verbosity levels. Each level includes the output of the lower levels:
| Level | Description |
|---|---|
| 0 | No output |
| 1 | Start, end labels; final results |
| 2 | Job names, warnings |
| 3 | Job task labels |
| 4 | Job and assertion output |
Registers a function (which is to be tested) with a human-readable name, or removes the function from the Tester's registry.
Tester:registerFunction([label], func)
-
[label]: (string) The name to assign the function, ornilto remove the function from the registry. -
func: (function) The function to register or remove.
Registers a job function (which will conduct tests) with an optional human-readable name.
Tester:registerJob([desc], func)
-
[desc](string) Optional description to print when running the job. -
func(function) The job function.
Notes:
- Running a specific job function more than once in a test is treated as an error.
Runs the Tester. Each job is executed in the order of registration, and is considered to have passed if it returns without raising a Lua error.
Tester:runJobs()
The following methods are intended to be called within job functions.
Wrapper for Lua's print() that only prints if an appropriate verbosity level is set.
Tester:print(level, ...)
-
level: The verbosity level of this message. If the Tester's verbosity is lower, the message is not printed. -
...: Arguments forprint().
Wrapper for Lua's io.write() that only prints if an appropriate verbosity level is set.
Tester:write(level, str)
-
level: The verbosity level of this message. If the Tester's verbosity is lower, the message is not printed. -
str: The string forio.write().
Increments the Tester's warning counter, and prints a message to the terminal if the Tester's verbosity level is 2 or greater.
Tester:warn(str)
str: The string to conditionally print.
Prints a line feed (newline) if the verbosity level matches. Works in tandem with Tester:print(), Tester:write() or Tester:warn() to prevent more than two line feeds from being printed at a time.
For this to work correctly, you must not emit trailing \ns at the end of any console output.
Tester:lf(level)
level: The verbosity level of the line feed to print. If the Tester's verbosity is lower, the line feed is not printed.
Runs a function, expecting it to return without raising a Lua error. If an error is raised, then the job fails.
local a,b,c,d,e,f = Tester:expectLuaReturn([desc], func, ...)
-
[desc]: (string) Optional string description for the job. -
func: (function) The function to test. -
...: varargs list to be passed tofunc.
Returns: The first six return values of func.
Runs a function, expecting it to raise a Lua error. If the function returns, then the job fails.
Tester:expectLuaError([desc], func, ...)
-
[desc]: (string) Optional string description for the job. -
func: (function) The function to test. -
...: varargs list to be passed tofunc.
Notes:
- Care should be taken with functions that modify global state before error paths are hit, and also functions which do not clean up their allocations or other state when raising a Lua error.
The tester instance includes the following assertion methods:
| Method | Pass Condition |
|---|---|
| Tester:isEqual(a, b) | a == b |
| Tester:isNotEqual(a, b) | a ~= b |
| Tester:isBoolTrue(a) | a == true |
| Tester:isBoolFalse(a) | a == false |
| Tester:isEvalTrue(a) | a ~= false and a ~= nil |
| Tester:isEvalFalse(a) | a == false or a == nil |
| Tester:isNil(a) | a == nil |
| Tester:isNotNil(a) | a ~= nil |
| Tester:isNan(a) | a ~= a |
| Tester:isNotNan(a) | a == a |
| Tester:isType(val, ...) | type(val) in ... |
| Tester:isNotType(val, ...) | type(val) not in ... |
For the last two, ... is a varargs list of strings. For example, to assert that a value is a string or a boolean, you could call Tester:isType(val, "string", "boolean").
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