Modifier.sentryTag uses Modifier.Node (#4029)

* Modifier.sentryTag uses Modifier.Node

* Update Changelog

* Add UI test for SentryModifier

* Make sentrymodifier a robolectric test

* Remove redundant dep

---------

Co-authored-by: Markus Hintersteiner <markus.hintersteiner@sentry.io>
Co-authored-by: Roman Zavarnitsyn <rom4ek93@gmail.com>

Author: 3 people

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Changelog
 
+## Unreleased
+
+### Fixes
+
+- (Jetpack Compose) Modifier.sentryTag now uses Modifier.Node ([#4029](https://github.com/getsentry/sentry-java/pull/4029))
+  - This allows Composables that use this modifier to be skippable
+
 ## 7.21.0
 
 ### Fixes

buildSrc/src/main/java/Config.kt

@@ -201,6 +201,7 @@ object Config {
         val javaFaker = "com.github.javafaker:javafaker:1.0.2"
         val msgpack = "org.msgpack:msgpack-core:0.9.8"
         val leakCanaryInstrumentation = "com.squareup.leakcanary:leakcanary-android-instrumentation:2.14"
+        val composeUiTestJunit4 = "androidx.compose.ui:ui-test-junit4:$composeVersion"
     }
 
     object QualityPlugins {

sentry-compose/build.gradle.kts

@@ -60,6 +60,11 @@ kotlin {
                 implementation(Config.TestLibs.mockitoKotlin)
                 implementation(Config.TestLibs.mockitoInline)
                 implementation(Config.Libs.composeNavigation)
+                implementation(Config.TestLibs.robolectric)
+                implementation(Config.TestLibs.androidxRunner)
+                implementation(Config.TestLibs.androidxJunit)
+                implementation(Config.TestLibs.androidxTestRules)
+                implementation(Config.TestLibs.composeUiTestJunit4)
             }
         }
     }

sentry-compose/src/androidMain/kotlin/io/sentry/compose/SentryModifier.kt

@@ -1,8 +1,13 @@
 package io.sentry.compose
 
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.node.ModifierNodeElement
+import androidx.compose.ui.node.SemanticsModifierNode
+import androidx.compose.ui.platform.InspectorInfo
+import androidx.compose.ui.semantics.SemanticsConfiguration
+import androidx.compose.ui.semantics.SemanticsModifier
 import androidx.compose.ui.semantics.SemanticsPropertyKey
-import androidx.compose.ui.semantics.semantics
+import androidx.compose.ui.semantics.SemanticsPropertyReceiver
 
 public object SentryModifier {
 
@@ -19,11 +24,35 @@ public object SentryModifier {
     )
 
     @JvmStatic
-    public fun Modifier.sentryTag(tag: String): Modifier {
-        return semantics(
-            properties = {
-                this[SentryTag] = tag
+    public fun Modifier.sentryTag(tag: String): Modifier =
+        this then SentryTagModifierNodeElement(tag)
+
+    private data class SentryTagModifierNodeElement(val tag: String) :
+        ModifierNodeElement<SentryTagModifierNode>(), SemanticsModifier {
+
+        override val semanticsConfiguration: SemanticsConfiguration =
+            SemanticsConfiguration().also {
+                it[SentryTag] = tag
             }
-        )
+
+        override fun create(): SentryTagModifierNode = SentryTagModifierNode(tag)
+
+        override fun update(node: SentryTagModifierNode) {
+            node.tag = tag
+        }
+
+        override fun InspectorInfo.inspectableProperties() {
+            name = "sentryTag"
+            properties["tag"] = tag
+        }
+    }
+
+    private class SentryTagModifierNode(var tag: String) :
+        Modifier.Node(),
+        SemanticsModifierNode {
+
+        override fun SemanticsPropertyReceiver.applySemantics() {
+            this[SentryTag] = tag
+        }
     }
 }

sentry-compose/src/androidUnitTest/kotlin/io/sentry/compose/SentryModifierComposeTest.kt

@@ -0,0 +1,59 @@
+package io.sentry.compose
+
+import android.app.Application
+import android.content.ComponentName
+import androidx.activity.ComponentActivity
+import androidx.compose.foundation.layout.Box
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.test.SemanticsMatcher
+import androidx.compose.ui.test.junit4.createComposeRule
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import io.sentry.compose.SentryModifier.sentryTag
+import org.junit.Rule
+import org.junit.Test
+import org.junit.rules.TestWatcher
+import org.junit.runner.Description
+import org.junit.runner.RunWith
+import org.robolectric.Shadows
+import org.robolectric.annotation.Config
+
+@RunWith(AndroidJUnit4::class)
+@Config(sdk = [30])
+class SentryModifierComposeTest {
+
+    companion object {
+        private const val TAG_VALUE = "ExampleTagValue"
+    }
+
+    // workaround for robolectric tests with composeRule
+    // from https://github.com/robolectric/robolectric/pull/4736#issuecomment-1831034882
+    @get:Rule(order = 1)
+    val addActivityToRobolectricRule = object : TestWatcher() {
+        override fun starting(description: Description?) {
+            super.starting(description)
+            val appContext: Application = ApplicationProvider.getApplicationContext()
+            Shadows.shadowOf(appContext.packageManager).addActivityIfNotPresent(
+                ComponentName(
+                    appContext.packageName,
+                    ComponentActivity::class.java.name
+                )
+            )
+        }
+    }
+
+    @get:Rule(order = 2)
+    val rule = createComposeRule()
+
+    @Test
+    fun sentryModifierAppliesTag() {
+        rule.setContent {
+            Box(modifier = Modifier.sentryTag(TAG_VALUE))
+        }
+        rule.onNode(
+            SemanticsMatcher(TAG_VALUE) {
+                it.config.find { (key, _) -> key.name == SentryModifier.TAG }?.value == TAG_VALUE
+            }
+        ).assertExists()
+    }
+}