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Auto merge of #7083 - GuillaumeGomez:bool-assert-eq, r=camsteffen

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Add lint to check for boolean comparison in assert macro calls

This PR adds a lint to check if an assert macro is using a boolean as "comparison value". For example:

```rust
assert_eq!("a".is_empty(), false);
```

Could be rewritten as:

```rust
assert!(!"a".is_empty());
```

PS: The dev guidelines are amazing. Thanks a lot for writing them!

changelog: Add `bool_assert_comparison` lint
This commit is contained in:
bors
2021-04-21 13:58:53 +00:00
parent 926286acfe e2e104b993
commit bbc22e2ef3
6 changed files with 284 additions and 0 deletions
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5
clippy_lints/src/lib.rs
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@@ -178,6 +178,7 @@ mod await_holding_invalid;
mod bit_mask;
mod blacklisted_name;
mod blocks_in_if_conditions;
mod bool_assert_comparison;
mod booleans;
mod bytecount;
mod cargo_common_metadata;
@@ -568,6 +569,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
bit_mask::VERBOSE_BIT_MASK,
blacklisted_name::BLACKLISTED_NAME,
blocks_in_if_conditions::BLOCKS_IN_IF_CONDITIONS,
bool_assert_comparison::BOOL_ASSERT_COMPARISON,
booleans::LOGIC_BUG,
booleans::NONMINIMAL_BOOL,
bytecount::NAIVE_BYTECOUNT,
@@ -1273,6 +1275,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
store.register_late_pass(|| box from_str_radix_10::FromStrRadix10);
store.register_late_pass(|| box manual_map::ManualMap);
store.register_late_pass(move || box if_then_some_else_none::IfThenSomeElseNone::new(msrv));
store.register_early_pass(|| box bool_assert_comparison::BoolAssertComparison);
store.register_group(true, "clippy::restriction", Some("clippy_restriction"), vec![
LintId::of(arithmetic::FLOAT_ARITHMETIC),
@@ -1453,6 +1456,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
LintId::of(bit_mask::INEFFECTIVE_BIT_MASK),
LintId::of(blacklisted_name::BLACKLISTED_NAME),
LintId::of(blocks_in_if_conditions::BLOCKS_IN_IF_CONDITIONS),
LintId::of(bool_assert_comparison::BOOL_ASSERT_COMPARISON),
LintId::of(booleans::LOGIC_BUG),
LintId::of(booleans::NONMINIMAL_BOOL),
LintId::of(casts::CAST_REF_TO_MUT),
@@ -1739,6 +1743,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
LintId::of(attrs::BLANKET_CLIPPY_RESTRICTION_LINTS),
LintId::of(blacklisted_name::BLACKLISTED_NAME),
LintId::of(blocks_in_if_conditions::BLOCKS_IN_IF_CONDITIONS),
LintId::of(bool_assert_comparison::BOOL_ASSERT_COMPARISON),
LintId::of(casts::FN_TO_NUMERIC_CAST),
LintId::of(casts::FN_TO_NUMERIC_CAST_WITH_TRUNCATION),
LintId::of(collapsible_if::COLLAPSIBLE_ELSE_IF),