[PowerAssert] Add codegen tests

plugins/power-assert/testData/helpers/InfixDispatch.kt

@@ -0,0 +1,12 @@
+package infix.dispatch
+
+class Wrapper<V>(
+  private val value: V,
+) {
+    infix fun mustEqual(expected: V): Unit = assert(value == expected)
+
+    fun mustEqual(expected: V, message: () -> String): Unit =
+        assert(value == expected, message)
+
+    override fun toString() = "Wrapper"
+}

plugins/power-assert/testData/helpers/InfixExtension.kt

@@ -0,0 +1,5 @@
+package infix.extension
+
+infix fun <V> V.mustEqual(expected: V): Unit = assert(this == expected)
+fun <V> V.mustEqual(expected: V, message: () -> String): Unit =
+    assert(this == expected, message)

plugins/power-assert/testData/helpers/utils.kt

@@ -0,0 +1,8 @@
+fun expectThrowableMessage(block: () -> Unit): String {
+    try {
+        block()
+        throw AssertionError("no failure")
+    } catch (e: Throwable) {
+        return e.message ?: throw AssertionError("no message")
+    }
+}