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- Added missing `LICENSE` file - Moved lcov example to a separate file - Updated `README` --------- Co-authored-by: Karol Sewilo <karol.sewilo@swmansion.com> Co-authored-by: Karol Sewiło <95349104+ksew1@users.noreply.github.com> Co-authored-by: Tomasz Rejowski <34059895+Arcticae@users.noreply.github.com>
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| MIT License | ||
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| Copyright (c) 2024 Software Mansion | ||
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| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of this software and associated documentation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furnished to do so, subject to the following conditions: | ||
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| The above copyright notice and this permission notice shall be included in all | ||
| copies or substantial portions of the Software. | ||
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| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| SOFTWARE. |
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| ## Example | ||
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| Let's say you have a following program | ||
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| ```rust | ||
| pub enum Operation { | ||
| Add, | ||
| Multiply, | ||
| } | ||
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| fn add(a: i32, b: i32) -> i32 { | ||
| a + b | ||
| } | ||
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| fn multiply(a: i32, b: i32) -> i32 { | ||
| a * b | ||
| } | ||
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| pub fn calculator(a: i32, b: i32, operation: Operation) -> i32 { | ||
| match operation { | ||
| Operation::Add => add(a, b), | ||
| Operation::Multiply => multiply(a, b), | ||
| } | ||
| } | ||
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| ``` | ||
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| and you cover it with tests | ||
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| ```rust | ||
| #[test] | ||
| fn calculator_add() { | ||
| assert(calculator(2, 3, Operation::Add) == 5, ''); | ||
| assert(calculator(-1, 1, Operation::Add) == 0, ''); | ||
| } | ||
| ``` | ||
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| When running with `cairo-coverage` you will get a coverage report in `.lcov` format: | ||
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| ```lcov | ||
| TN: | ||
| SF:/Users/karol/Starkware/temp_pr/cairo-coverage/crates/cairo-coverage/tests/data/readme_example/src/lib.cairo | ||
| FN:8,8,readme_example::add | ||
| FNDA:4,readme_example::add | ||
| FN:16,18,readme_example::calculator | ||
| FNDA:4,readme_example::calculator | ||
| FN:12,12,readme_example::multiply | ||
| FNDA:0,readme_example::multiply | ||
| FNF:3 | ||
| FNH:2 | ||
| DA:8,4 | ||
| DA:12,0 | ||
| DA:16,2 | ||
| DA:17,4 | ||
| DA:18,0 | ||
| LF:5 | ||
| LH:3 | ||
| end_of_record | ||
| ``` | ||
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| Let's break it down | ||
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| ### Explanation | ||
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| 1. **General Information** | ||
| - **TN**: Test Name (optional, left empty) | ||
| - **SF**: Source File path `/path/to/your/project/src/lib.rs` | ||
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| 2. **Function Details** | ||
| - **FN:8,8,readme_example::add**: The `add` function starts at line 8 and ends at line 8. | ||
| - **FN:12,12,readme_example::multiply**: The `multiply` function starts at line 12 and ends at line 12. | ||
| - **FN:16,18,readme_example::calculator**: The `calculator` function starts at line 16 and ends at line 18. | ||
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| 3. **Function Hit Details** | ||
| - **FNDA:4,readme_example::add**: The `add` function was executed 4 times (Currently not accurate as expected is to | ||
| be 2). | ||
| - **FNDA:0,readme_example::multiply**: The `multiply` function was not executed in the tests. | ||
| - **FNDA:4,readme_example::calculator**: The `calculator` function was executed 4 times (Currently not accurate as | ||
| expected is to be 2). | ||
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| 4. **Function Summary** | ||
| - **FNF:3**: The number of functions found in the source file. There are 3 functions: `add`, `multiply`, | ||
| and `calculator`. | ||
| - **FNH:2**: The number of functions that were hit. 2 out of the 3 functions were | ||
| executed: `add` and `calculator`. | ||
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| 5. **Line Execution Details** | ||
| - **DA:\<line number\>,\<hit count\>**: Indicates whether each line was executed and how many times. | ||
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| Here's the details of line coverage: | ||
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| | Line | Hits | Explanation | | ||
| |------|------|-------------------------------------------------| | ||
| | 8 | 4 | Line 8 (body of `add`) hit 4 times | | ||
| | 12 | 0 | Line 12 (body of `multiply`) not hit | | ||
| | 16 | 2 | Line 16 (start of `match`) hit 2 times | | ||
| | 17 | 4 | Line 17 (call to `add` in `match`) hit 4 times | | ||
| | 18 | 0 | Line 18 (call to `multiply` in `match`) not hit | | ||
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| 6. **Line Coverage Summary** | ||
| - **LF:9**: The total number of lines in the file is 9. | ||
| - **LH:6**: The total number of lines that were hit (executed at least once) is 6. | ||
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| 7. **End of Record** | ||
| - **end_of_record**: Indicates the end of this coverage record. | ||
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| ### Summary | ||
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| 1. **Functions Coverage**: | ||
| - Three functions are defined. | ||
| - Two functions are executed at least once: `add` and `calculator`. | ||
| - One function (`multiply`) was not executed. | ||
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| 2. **Line Coverage**: | ||
| - 5 lines of code in total. | ||
| - 3 lines were executed during testing. | ||
| - Lines 11 and 12 (`multiply` function) and line 19 (match arm for `Multiply` operation) were not executed. | ||
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| > 📝 **Note** | ||
| > | ||
| > This format is for a single file. If there are multiple files, each file's report will be concatenated together | ||
| > with `end_of_record` separating them, like this: | ||
| > ```lcov | ||
| > TN: | ||
| > SF:/path/to/your/project/src/operations.cairo | ||
| > FN:8,8,readme_example::add | ||
| > FNDA:4,readme_example::add | ||
| > FN:12,12,readme_example::multiply | ||
| > FNDA:0,readme_example::multiply | ||
| > ... other metrics ... | ||
| > end_of_record | ||
| > TN: | ||
| > SF:/path/to/your/project/src/lib.cairo | ||
| > FN:16,18,readme_example::calculator | ||
| > FNDA:4,readme_example::calculator | ||
| > ... other metrics ... | ||
| > LH:10 | ||
| > end_of_record | ||
| > ``` |