106 lines
3.5 KiB
Kotlin
106 lines
3.5 KiB
Kotlin
/*
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* Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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/*
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* Diagnostics tests for Multiple Inheritance (MI)
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*/
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import kotlinx.coroutines.test.runTest
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import net.sergeych.lyng.eval
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import kotlin.test.Test
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import kotlin.test.assertFails
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import kotlin.test.assertTrue
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class MIDiagnosticsTest {
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@Test
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fun missingMemberIncludesLinearizationAndHint() = runTest {
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val ex = assertFails {
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eval(
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"""
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class Foo(val a) { fun runA() { "ResultA:" + a } }
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class Bar(val b) { fun runB() { "ResultB:" + b } }
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class FooBar(a,b) : Foo(a), Bar(b) { }
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val fb = FooBar(1,2)
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fb.qux()
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""".trimIndent()
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)
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}
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val msg = ex.message ?: ""
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assertTrue(msg.contains("no such member: qux"), "must mention missing member name")
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assertTrue(msg.contains("FooBar"), "must mention receiver class name")
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assertTrue(msg.contains("Considered order:"), "must include linearization header")
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assertTrue(msg.contains("FooBar") && msg.contains("Foo") && msg.contains("Bar"), "must list classes in order")
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assertTrue(msg.contains("this@") || msg.contains("(obj as"), "must suggest qualification or cast")
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}
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@Test
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fun missingFieldIncludesLinearization() = runTest {
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val ex = assertFails {
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eval(
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"""
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class Foo(val a) { var tag = "F" }
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class Bar(val b) { var tag = "B" }
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class FooBar(a,b) : Foo(a), Bar(b) { }
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val fb = FooBar(1,2)
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fb.unknownField
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""".trimIndent()
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)
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}
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val msg = ex.message ?: ""
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assertTrue(msg.contains("no such field: unknownField"))
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assertTrue(msg.contains("FooBar"))
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assertTrue(msg.contains("Considered order:"))
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}
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@Test
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fun invalidQualifiedThisReportsAncestorError() = runTest {
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assertFails {
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eval(
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"""
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class Foo() { fun f() { "F" } }
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class Bar() { fun g() { "G" } }
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class Baz() : Foo() {
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fun bad() { this@Bar.g() }
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}
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val b = Baz()
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b.bad()
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""".trimIndent()
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)
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}
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}
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@Test
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fun castFailureMentionsActualAndTargetTypes() = runTest {
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val ex = assertFails {
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eval(
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"""
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class Foo() { }
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class Bar() { }
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val b = Bar()
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(b as Foo)
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""".trimIndent()
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)
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}
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val msg = ex.message ?: ""
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// message like: Cannot cast Bar to Foo (be tolerant across targets)
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val lower = msg.lowercase()
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assertTrue(lower.contains("cast"), "message should mention cast")
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assertTrue(msg.contains("Bar") || msg.contains("Foo"), "should mention at least one of the types")
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}
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}
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