assertContains for OpenEndRange argument

#KT-52932

libraries/kotlin.test/common/src/main/kotlin/kotlin/test/Assertions.kt

@@ -279,7 +279,12 @@ fun <T : Comparable<T>> assertContains(range: ClosedRange<T>, value: T, message:
     assertRangeContains(range, value, message, ClosedRange<T>::contains)
 }
 
-// TODO: assertContains for OpenEndRange
+/** Asserts that the [range] contains the specified [value], with an optional [message]. */
+@SinceKotlin("1.7")
+@ExperimentalStdlibApi
+fun <T : Comparable<T>> assertContains(range: OpenEndRange<T>, value: T, message: String? = null) {
+    assertRangeContains(range, value, message, OpenEndRange<T>::contains)
+}
 
 /** Asserts that the [range] contains the specified [value], with an optional [message]. */
 @SinceKotlin("1.5")

libraries/kotlin.test/common/src/test/kotlin/kotlin/test/tests/AssertContainsTest.kt

@@ -109,6 +109,18 @@ class AssertContainsTest {
         }
     }
 
+    @Test
+    @OptIn(ExperimentalStdlibApi::class)
+    fun assertContainsOpenRange() {
+        val range = 0.0.rangeUntil(1.0) // TODO: replace with ..< by 1.8
+        assertContains(range, 0.99)
+
+        val one = 1.0
+        testFailureMessage("Expected the range <$range> to contain the value <$one>.") {
+            assertContains(range, one)
+        }
+    }
+
     @Test
     fun testAssertContainsMap() {
         val map = mapOf(