Don't allow @OptIn usage for inline methods
Bug: 190080671
Test: BanInlineOptInTest
Test: presubmit
Change-Id: I3e2c812cbb389b3f2e18d0c6ea6fd2df7d6e0fcb
diff --git a/lint-checks/src/test/java/androidx/build/lint/BanInlineOptInTest.kt b/lint-checks/src/test/java/androidx/build/lint/BanInlineOptInTest.kt
new file mode 100644
index 0000000..e58fb16
--- /dev/null
+++ b/lint-checks/src/test/java/androidx/build/lint/BanInlineOptInTest.kt
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+@file:Suppress("UnstableApiUsage")
+
+package androidx.build.lint
+
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+
+@RunWith(JUnit4::class)
+class BanInlineOptInTest : AbstractLintDetectorTest(
+ useDetector = BanInlineOptIn(),
+ useIssues = listOf(BanInlineOptIn.ISSUE),
+) {
+
+ @Test
+ fun `Detect inline function with an OptIn annotation`() {
+ val input = kotlin(
+ """
+@RequiresOptIn
+annotation class ExperimentalSampleAnnotation
+
+@OptIn(ExperimentalSampleAnnotation::class)
+inline fun String.myInlineFun() = this.length
+ """.trimIndent()
+ )
+
+ /* ktlint-disable max-line-length */
+ val expected = """
+src/ExperimentalSampleAnnotation.kt:5: Error: Inline functions cannot opt into experimental APIs. [BanInlineOptIn]
+inline fun String.myInlineFun() = this.length
+ ~~~~~~~~~~~
+1 errors, 0 warnings
+ """.trimIndent()
+ /* ktlint-enable max-line-length */
+
+ check(input).expect(expected)
+ }
+
+ @Test
+ fun `Detect inline function without an OptIn annotation`() {
+ val input = kotlin(
+ """
+inline fun String.myInlineFun() = this.length
+ """.trimIndent()
+ )
+
+ check(input).expectClean()
+ }
+}
