NamedArguments: fix false positive on spread varargs (#7283)

detekt · May 11, 2024 · b553d95 · b553d95
1 parent 633d458
commit b553d95
Show file tree

Hide file tree

Showing 2 changed files with 20 additions and 7 deletions.
diff --git a/...complexity/src/main/kotlin/io/gitlab/arturbosch/detekt/rules/complexity/NamedArguments.kt b/...complexity/src/main/kotlin/io/gitlab/arturbosch/detekt/rules/complexity/NamedArguments.kt
@@ -9,6 +9,7 @@ import io.gitlab.arturbosch.detekt.api.Rule
 import io.gitlab.arturbosch.detekt.api.config
 import org.jetbrains.kotlin.psi.KtCallExpression
 import org.jetbrains.kotlin.psi.KtLambdaArgument
+import org.jetbrains.kotlin.resolve.calls.components.isVararg
 import org.jetbrains.kotlin.resolve.calls.util.getParameterForArgument
 import org.jetbrains.kotlin.resolve.calls.util.getResolvedCall
 
@@ -58,17 +59,14 @@ class NamedArguments(config: Config) : Rule(
         val unnamedArguments = valueArguments.mapNotNull { argument ->
             if (argument.isNamed() || argument is KtLambdaArgument) return@mapNotNull null
             val parameter = resolvedCall.getParameterForArgument(argument) ?: return@mapNotNull null
-            if (ignoreArgumentsMatchingNames &&
-                parameter.name.asString() == argument.getArgumentExpression()?.text
-            ) {
+            if (ignoreArgumentsMatchingNames && parameter.name.asString() == argument.getArgumentExpression()?.text) {
                 return@mapNotNull null
             }
             argument to parameter
         }
-        if (unnamedArguments.isEmpty()) return false
 
-        return unnamedArguments.all { (argument, parameter) ->
-            argument.getSpreadElement() != null || parameter.varargElementType == null
-        }
+        return unnamedArguments.isNotEmpty() &&
+            unnamedArguments.count { (argument, _) -> argument.isSpread } <= 1 &&
+            unnamedArguments.all { (argument, parameter) -> argument.isSpread || !parameter.isVararg }
     }
 }
diff --git a/...lexity/src/test/kotlin/io/gitlab/arturbosch/detekt/rules/complexity/NamedArgumentsSpec.kt b/...lexity/src/test/kotlin/io/gitlab/arturbosch/detekt/rules/complexity/NamedArgumentsSpec.kt
@@ -144,6 +144,21 @@ class NamedArgumentsSpec(val env: KotlinCoreEnvironment) {
         assertThat(findings).isEmpty()
     }
 
+    @Test
+    fun `invocation with spread varargs should not be flagged`() {
+        val code = """
+            fun varargFun(str: String, vararg nums: Int) {}
+            fun call() {
+                val nums1 = intArrayOf(1, 2, 3)
+                val nums2 = intArrayOf(4, 5, 6)
+                val nums3 = intArrayOf(7, 8, 9)
+                varargFun("a", *nums1, *nums2, *nums3)
+            }
+        """.trimIndent()
+        val findings = subject.compileAndLintWithContext(env, code)
+        assertThat(findings).isEmpty()
+    }
+
     @Test
     fun `invocation with spread operator should be flagged`() {
         val code = """