Adding in, hashkey, equal

src/linting/extended_checks.jl

@@ -71,6 +71,10 @@ struct Channel_Extension <: ExtendedRule end
 struct Task_Extension <: ExtendedRule end
 struct ErrorException_Extension <: ExtendedRule end
 struct Error_Extension <: ExtendedRule end
+struct In_Extension <: ExtendedRule end
+struct HasKey_Extension <: ExtendedRule end
+struct Equal_Extension <: ExtendedRule end
+
 
 const all_extended_rule_types = Ref{Any}(InteractiveUtils.subtypes(ExtendedRule))
 
@@ -217,3 +221,19 @@ function check(::Error_Extension, x::EXPR)
         "Use custom exception instead of the generic `error(...)`")
 end
 
+function check(::In_Extension, x::EXPR)
+    msg = "It is preferable to use `tin(item,collection)` instead of the Julia's `in`."
+    generic_check(x, "in(hole_variable,hole_variable)", msg)
+    generic_check(x, "hole_variable in hole_variable", msg)
+
+end
+
+function check(::HasKey_Extension, x::EXPR)
+    msg = "It is preferable to use `thaskey(dict,key)` instead of the Julia's `haskey`."
+    generic_check(x, "haskey(hole_variable,hole_variable)", msg)
+end
+
+function check(::Equal_Extension, x::EXPR)
+    msg = "It is preferable to use `tequal(dict,key)` instead of the Julia's `equal`."
+    generic_check(x, "equal(hole_variable,hole_variable)", msg)
+end

test/rai_rules_tests.jl

@@ -4,6 +4,9 @@ import CSTParser
 using Test
 using JSON3
 
+# Reset the caches before running the tests.
+StaticLint.reset_static_lint_caches()
+
 function foo()
     @async 1 + 2
 end
@@ -461,6 +464,26 @@ end
                 "Line 2, column 9: Need a specific Array type to be provided.",
                 directory = "src/Compiler/")
     end
+
+    @testset "in, equal, haskey" begin
+        source = """
+            function f()
+                x = 10 in [10]
+                y = in(10, [10])
+                z = equal(10, "hello")
+                w = haskey(Dict(1=>1000), 1)
+            end
+            """
+        @test lint_has_error_test(source)
+        @test lint_test(source,
+            "Line 2, column 9: It is preferable to use `tin(item,collection)` instead of the Julia's `in`.")
+        @test lint_test(source,
+            "Line 3, column 9: It is preferable to use `tin(item,collection)` instead of the Julia's `in`.")
+        @test lint_test(source,
+            "Line 4, column 9: It is preferable to use `tequal(dict,key)` instead of the Julia's `equal`.")
+        @test lint_test(source,
+            "Line 5, column 9: It is preferable to use `thaskey(dict,key)` instead of the Julia's `haskey`.")
+    end
 end
 
 @testset "Comparison" begin
@@ -512,6 +535,10 @@ end
     @test t("Future{T}(()->nothing)", "Future{hole_variable}(hole_variable_star)")
     @test !t("Future()", "Future{hole_variable}(hole_variable_star)")
     @test !t("Future{Any}() do f nothing end", "Future{hole_variable}(hole_variable_star)")
+
+    # in keyword
+    @test t("in(hole_variable,hole_variable)", "in(x,y)")
+    @test t("x in y", "hole_variable in hole_variable")
 end
 
 @testset "offset to line" begin