test: 💍 add test for shared functions

core/src/test/kotlin/SharedFunctionTest.kt

@@ -0,0 +1,62 @@
+import org.junit.jupiter.api.parallel.Execution
+import org.junit.jupiter.api.parallel.ExecutionMode
+import tw.xcc.gumtree.matchers.comparator.calculateDiceValue
+import tw.xcc.gumtree.matchers.comparator.hasSameParent
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+
+@Execution(ExecutionMode.CONCURRENT)
+internal class SharedFunctionTest {
+    @Test
+    fun `test dice function`() {
+        val sizeA = 298347
+        val sizeB = 182764
+        val theirIntersectionSize = 67323
+
+        val expectDice = 0.2798647297609076
+        val actualDice = calculateDiceValue(theirIntersectionSize, sizeA, sizeB)
+
+        assertEquals(expectDice, actualDice, 0.0001)
+    }
+
+    @Test
+    fun `test dice function with zero size`() {
+        val sizeA = 0
+        val sizeB = 0
+        val theirIntersectionSize = 0
+
+        val expectDice = 1.0
+        val actualDice = calculateDiceValue(theirIntersectionSize, sizeA, sizeB)
+
+        assertEquals(expectDice, actualDice, 0.0001)
+    }
+
+    @Test
+    fun `test dice function with zero intersection`() {
+        val sizeA = 298347
+        val sizeB = 182764
+        val theirIntersectionSize = 0
+
+        val expectDice = 0.0
+        val actualDice = calculateDiceValue(theirIntersectionSize, sizeA, sizeB)
+
+        assertEquals(expectDice, actualDice, 0.0001)
+    }
+
+    @Test
+    fun `test has same parent`() {
+        val parent = FakeTinnyTree()
+        val child1 = FakeTinnyTree().also { it.setParentTo(parent) }
+        val child2 = FakeTinnyTree().also { it.setParentTo(parent) }
+        val child3 = FakeTinnyTree().also { it.setParentTo(parent) }
+        val child4 = FakeTinnyTree().also { it.setParentTo(parent) }
+
+        val m1 = child1 to child2
+        val m2 = child3 to child4
+
+        val actualResult = hasSameParent(m1, m2)
+
+        assertTrue(actualResult)
+    }
+}