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Add a test for valueCounts #758

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Jun 27, 2024
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Add a test for valueCounts #758

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11 changes: 11 additions & 0 deletions core/src/test/kotlin/org/jetbrains/kotlinx/dataframe/testSets/person/DataColumnTests.kt
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Original file line number Diff line number Diff line change
@@ -1,10 +1,13 @@
package org.jetbrains.kotlinx.dataframe.testSets.person

import io.kotest.matchers.shouldBe
import org.jetbrains.kotlinx.dataframe.api.columnOf
import org.jetbrains.kotlinx.dataframe.api.count
import org.jetbrains.kotlinx.dataframe.api.sort
import org.jetbrains.kotlinx.dataframe.api.sortBy
import org.jetbrains.kotlinx.dataframe.api.sortByDesc
import org.jetbrains.kotlinx.dataframe.api.sortDesc
import org.jetbrains.kotlinx.dataframe.api.valueCounts
import org.junit.Test

class DataColumnTests : BaseTest() {
Expand All @@ -14,4 +17,12 @@ class DataColumnTests : BaseTest() {
typed.age.sort() shouldBe typed.sortBy { age }.age
typed.age.sortDesc() shouldBe typed.sortByDesc { age }.age
}

@Test
fun `value counts`() {
val languages by columnOf("Kotlin", "Kotlin", null, null, "C++")
val languageCounts = languages.valueCounts()
languageCounts[languages].values() shouldBe listOf("Kotlin", "C++")
languageCounts.count.values() shouldBe listOf(2, 1)
}
}