Minor. Add more tests

compiler/testData/codegen/box/inlineClasses/unboxGenericParameter/lambda/stringGeneric.kt

@@ -0,0 +1,48 @@
+// WITH_STDLIB
+// WORKS_WHEN_VALUE_CLASS
+// LANGUAGE: +ValueClasses, +GenericInlineClassParameter
+
+fun <T: String> underlying(a: IC<T>): T = bar(a) {
+    it.value
+}
+
+fun <T: String> extension(a: IC<T>): T = bar(a) {
+    it.extensionValue()
+}
+
+fun <T: String> dispatch(a: IC<T>): T = bar(a) {
+    it.dispatchValue()
+}
+
+fun <T: String> normal(a: IC<T>): T = bar(a) {
+    normalValue(it)
+}
+
+fun <T, R> bar(value: T, f: (T) -> R): R {
+    return f(value)
+}
+
+fun <T: String> IC<T>.extensionValue(): T = value
+
+fun <T: String> normalValue(ic: IC<T>): T = ic.value
+
+OPTIONAL_JVM_INLINE_ANNOTATION
+value class IC<T: String>(val value: T) {
+    fun dispatchValue(): T = value
+}
+
+fun box(): String {
+    var res = underlying<String>(IC("O")) + "K"
+    if (res != "OK") return "FAIL 1: $res"
+
+    res = extension<String>(IC("O")) + "K"
+    if (res != "OK") return "FAIL 2: $res"
+
+    res = dispatch<String>(IC("O")) + "K"
+    if (res != "OK") return "FAIL 3: $res"
+
+    res = normal<String>(IC("O")) + "K"
+    if (res != "OK") return "FAIL 3: $res"
+
+    return "OK"
+}