# SubspaceTestContext

Artifact: [androidx.xr.compose:compose-testing](https://developer.android.com/jetpack/androidx/releases/xr-compose) [View Source](https://cs.android.com/search?q=file:androidx/xr/compose/testing/SubspaceTestContext.kt+class:androidx.xr.compose.testing.SubspaceTestContext) Added in [1.0.0-beta02](https://developer.android.com/jetpack/androidx/releases/xr-compose#1.0.0-beta02)


```
class SubspaceTestContext
```

<br />

*** ** * ** ***

Provides the testing context used for retrieving and interacting with 3D Semantics nodes present within a Subspace spatial compose hierarchy.

This context wraps an `https://developer.android.com/reference/kotlin/androidx/compose/ui/test/junit4/AndroidComposeTestRule` and allows `https://developer.android.com/reference/kotlin/androidx/xr/compose/testing/SubspaceSemanticsNodeInteraction` to extract spatial layout semantics, perform layout assertions, and filter specific elements in XR environments.

```kotlin
import androidx.compose.material3.Button
import androidx.compose.material3.Text
import androidx.compose.ui.test.onNodeWithText
import androidx.compose.ui.test.performClick
import androidx.compose.ui.unit.dp
import androidx.xr.compose.spatial.Subspace
import androidx.xr.compose.subspace.SpatialPanel
import androidx.xr.compose.subspace.layout.SubspaceModifier
import androidx.xr.compose.subspace.semantics.testTag
import androidx.xr.compose.testing.assertPositionInRootIsEqualTo
import androidx.xr.compose.testing.onSubspaceNode
import androidx.xr.compose.testing.onSubspaceNodeWithTag

var count = 0

composeTestRule.setContent {
    Subspace {
        SpatialPanel(SubspaceModifier.testTag("spatialPanel")) {
            Button(onClick = { count++ }) { Text("Increment") }
        }
    }
}

// Assert subspace node existence, position, and dimensions in the Spatial hierarchy
composeTestRule
    .onSubspaceNodeWithTag("spatialPanel")
    .assertExists()
    .assertPositionInRootIsEqualTo(0.dp, 0.dp, 0.dp)

// Interact with the 2D Compose node nested within the Spatial container
composeTestRule.onNodeWithText("Increment").performClick()

composeTestRule.waitForIdle()

// Verify outcomes
assert(count == 1)
```

```kotlin
import androidx.compose.ui.unit.dp
import androidx.xr.compose.spatial.Subspace
import androidx.xr.compose.subspace.SpatialPanel
import androidx.xr.compose.subspace.layout.SubspaceModifier
import androidx.xr.compose.subspace.layout.height
import androidx.xr.compose.subspace.layout.width
import androidx.xr.compose.subspace.semantics.testTag
import androidx.xr.compose.testing.assertHeightIsEqualTo
import androidx.xr.compose.testing.assertPositionInRootIsEqualTo
import androidx.xr.compose.testing.assertWidthIsEqualTo
import androidx.xr.compose.testing.onSubspaceNode
import androidx.xr.compose.testing.onSubspaceNodeWithTag

composeTestRule.setContent {
    Subspace {
        SpatialPanel(SubspaceModifier.width(100.dp).height(100.dp).testTag("myPanel")) {}
    }
}

// Check existence and exact spatial dimensions in DP using semantic matchers
composeTestRule
    .onSubspaceNodeWithTag("myPanel")
    .assertExists()
    .assertPositionInRootIsEqualTo(0.dp, 0.dp, 0.dp)
    .assertWidthIsEqualTo(100.dp)
    .assertHeightIsEqualTo(100.dp)
```