commonTest.tree.TestTreeConnectView.kt Maven / Gradle / Ivy

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InstantSearch Android is a library providing widgets and helpers to help you build the best instant-search experience on Android with Algolia. It is built on top of Algolia's Kotlin API Client to provide you a high-level solution to quickly build various search interfaces.

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package tree

import com.algolia.instantsearch.core.Callback
import com.algolia.instantsearch.core.tree.Node
import com.algolia.instantsearch.core.tree.Tree
import com.algolia.instantsearch.core.tree.TreePresenter
import com.algolia.instantsearch.core.tree.TreeView
import com.algolia.instantsearch.core.tree.TreeViewModel
import com.algolia.instantsearch.core.tree.asTree
import com.algolia.instantsearch.core.tree.connectView
import shouldBeEmpty
import shouldEqual
import shouldNotBeNull
import kotlin.test.Test

class TestTreeConnectView {

    private val bags = "Bags"
    private val shoes = "Shoes"
    private val shoesCocktail = "Shoes > Cocktail"
    private val shoesRunning = "Shoes > Running"
    private val expectedItems = listOf(bags, shoes, shoesCocktail, shoesRunning)
    private val expectedSelection = shoesRunning

    private val presenter: TreePresenter> = {
        it.asTree(Comparator { a, b -> a.compareTo(b) }) { node, _, _ ->
            node.content
        }
    }
    private val tree: Tree = Tree(
        mutableListOf(
            Node(bags),
            Node(shoes).copy(
                children = mutableListOf(
                    Node(shoesRunning),
                    Node(shoesCocktail)
                )
            )
        )
    )

    private class MockTreeView : TreeView> {

        internal var items: List = listOf()
        override var onSelectionChanged: Callback? = null

        override fun setTree(tree: List) {
            items = tree
        }
    }

    private inner class MockTreeViewModel(tree: Tree) : TreeViewModel(tree) {

        var selection: String = ""

        override fun computeSelections(key: String) {
            selection = key
        }
    }

    @Test
    fun connectShouldCallSetItem() {
        val view = MockTreeView()
        val viewModel = MockTreeViewModel(tree)
        val connection = viewModel.connectView(view, presenter)

        viewModel.selection = shoesRunning
        connection.connect()
        view.items shouldEqual expectedItems
    }

    @Test
    fun onItemChangedShouldCallSetItem() {
        val view = MockTreeView()
        val viewModel = MockTreeViewModel(Tree())
        val connection = viewModel.connectView(view, presenter)

        connection.connect()
        view.items.shouldBeEmpty()
        viewModel.tree.value = tree
        view.items shouldEqual expectedItems
    }

    @Test
    fun onClickShouldCallComputeSelections() {
        val view = MockTreeView()
        val viewModel = MockTreeViewModel(tree)
        val connection = viewModel.connectView(view, presenter)

        connection.connect()
        view.onSelectionChanged.shouldNotBeNull()
        view.onSelectionChanged!!(shoesRunning)
        viewModel.selection shouldEqual expectedSelection
    }
}