web: Add failing tests for composables passed into constructors (issue #746)

web/core/src/jsTest/kotlin/FailingTestCases.kt

@@ -5,7 +5,9 @@
 
 package org.jetbrains.compose.web.core.tests
 
+import androidx.compose.runtime.Composable
 import kotlin.test.Test
+import kotlin.test.assertEquals
 import kotlin.test.assertTrue
 
 class FailingTestCases {
@@ -22,6 +24,19 @@ class FailingTestCases {
         }
         assertTrue(expectedErrorThrown)
     }
+
+    data class DataClassTakesComposable(val c: @Composable () -> Unit)
+    class UsualClassTakesComposable(val c: @Composable () -> Unit)
+
+    @Test
+    fun passingComposableIntoConstructorOfDataClass() {
+        check(DataClassTakesComposable {}.c == null) // Expected behaviour: c != null
+    }
+
+    @Test
+    fun passingComposableIntoConstructorOfUsualClass() {
+        check(UsualClassTakesComposable {}.c == null) // Expected behaviour: c != null
+    }
 }
 
 @Suppress("Unused", "NOTHING_TO_INLINE", "NESTED_CLASS_IN_EXTERNAL_INTERFACE", "INLINE_EXTERNAL_DECLARATION", "WRONG_BODY_OF_EXTERNAL_DECLARATION", "NESTED_EXTERNAL_DECLARATION", "ClassName")