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docs: add a note about test files being compiled as separate V programs, independently from normal code

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Delyan Angelov 2022-12-19 13:15:39 +02:00
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1 changed files with 7 additions and 2 deletions
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@ -4291,9 +4291,14 @@ fn test_hello() {
assert hello() == 'Hello world' assert hello() == 'Hello world'
} }
``` ```
To run the test above, use `v hello_test.v`. This will check that the function `hello` is To run the test file above, use `v hello_test.v`. This will check that the function `hello` is
producing the correct output. V executes all test functions in the file. producing the correct output. V executes all test functions in the file.
Note: all `_test.v` files (both external and internal ones), are compiled as *separate programs*.
In other words, you may have as many `_test.v` files, and tests in them as you like, they will
not affect the compilation of your other code in `.v` files normally at all, but only when you
do explicitly `v file_test.v` or `v test .`.
* All test functions have to be inside a test file whose name ends in `_test.v`. * All test functions have to be inside a test file whose name ends in `_test.v`.
* Test function names must begin with `test_` to mark them for execution. * Test function names must begin with `test_` to mark them for execution.
* Normal functions can also be defined in test files, and should be called manually. Other * Normal functions can also be defined in test files, and should be called manually. Other
@ -6468,4 +6473,4 @@ Assignment Operators
+= -= *= /= %= += -= *= /= %=
&= |= ^= &= |= ^=
>>= <<= >>>= >>= <<= >>>=
``` ```