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node_modules/@react-native/gradle-plugin/shared-testutil/build.gradle.kts

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+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import org.gradle.api.tasks.testing.logging.TestExceptionFormat
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+import org.jetbrains.kotlin.gradle.dsl.KotlinVersion
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+plugins {
+  alias(libs.plugins.kotlin.jvm)
+  alias(libs.plugins.ktfmt)
+}
+
+repositories { mavenCentral() }
+
+group = "com.facebook.react"
+
+dependencies { implementation(libs.junit) }
+
+java { targetCompatibility = JavaVersion.VERSION_11 }
+
+kotlin { jvmToolchain(17) }
+
+tasks.withType<KotlinCompile>().configureEach {
+  compilerOptions {
+    apiVersion.set(KotlinVersion.KOTLIN_1_8)
+    // See comment above on JDK 11 support
+    jvmTarget.set(JvmTarget.JVM_11)
+    allWarningsAsErrors.set(
+        project.properties["enableWarningsAsErrors"]?.toString()?.toBoolean() ?: false
+    )
+  }
+}
+
+tasks.withType<Test>().configureEach {
+  testLogging {
+    exceptionFormat = TestExceptionFormat.FULL
+    showExceptions = true
+    showCauses = true
+    showStackTraces = true
+  }
+}

node_modules/@react-native/gradle-plugin/shared-testutil/src/main/kotlin/com/facebook/react/tests/OsRule.kt

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+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.tests
+
+import org.junit.rules.TestRule
+import org.junit.runner.Description
+import org.junit.runners.model.Statement
+
+/**
+ * A JUnit [TestRule] to override values of [System.getProperties] with the support of the [WithOs]
+ * annotation.
+ */
+class OsRule : TestRule {
+
+  private var retainOs: String? = null
+  private var retainArch: String? = null
+
+  override fun apply(statement: Statement, description: Description): Statement {
+    return object : Statement() {
+      override fun evaluate() {
+        val annotation = description.annotations.filterIsInstance<WithOs>().firstOrNull()
+
+        annotation?.os?.propertyName?.let { osName ->
+          retainOs = System.getProperty(OS_NAME_KEY)
+          System.setProperty(OS_NAME_KEY, osName)
+        }
+        annotation?.arch?.let { arch ->
+          if (arch.isNotBlank()) {
+            retainArch = System.getProperty(OS_ARCH_KEY)
+            System.setProperty(OS_ARCH_KEY, arch)
+          }
+        }
+        try {
+          statement.evaluate()
+        } finally {
+          retainOs?.let { System.setProperty(OS_NAME_KEY, it) }
+          retainArch?.let { System.setProperty(OS_ARCH_KEY, it) }
+        }
+      }
+    }
+  }
+
+  companion object {
+    const val OS_NAME_KEY = "os.name"
+    const val OS_ARCH_KEY = "os.arch"
+  }
+}

node_modules/@react-native/gradle-plugin/shared-testutil/src/main/kotlin/com/facebook/react/tests/WithOs.kt

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+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.tests
+
+/** Annotation to specify an Operating System to override the "os.name" System Property. */
+@Retention(AnnotationRetention.RUNTIME) annotation class WithOs(val os: OS, val arch: String = "")
+
+enum class OS(val propertyName: String) {
+  WIN("Windows"),
+  MAC("MacOs"),
+  LINUX("Linux"),
+}