Update cheatsheets

cargo-test

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# cargo test
+
+> Execute the unit and integration tests of a Rust package.
+> More information: <https://doc.rust-lang.org/cargo/commands/cargo-test.html>.
+
+- Only run tests containing a specific string in their names:
+
+`cargo test {{testname}}`
+
+- Set the number of simultaneous running test cases:
+
+`cargo test -- --test-threads {{count}}`
+
+- Test artifacts in release mode, with optimizations:
+
+`cargo test --release`
+
+- Test all packages in the workspace:
+
+`cargo test --workspace`
+
+- Run tests for a specific package:
+
+`cargo test --package {{package}}`
+
+- Run tests without hiding output from test executions:
+
+`cargo test -- --nocapture`