Finished test case

math/src/test/java/com/ivy/math/ExpressionParserTest.kt

@@ -0,0 +1,35 @@
+package com.ivy.math
+
+import assertk.assertThat
+import assertk.assertions.isEqualTo
+import com.ivy.parser.Parser
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.params.ParameterizedTest
+import org.junit.jupiter.params.provider.CsvSource
+
+internal class ExpressionParserTest {
+
+    private lateinit var parser: Parser<TreeNode>
+
+    @BeforeEach
+    fun setUp() {
+        parser = expressionParser()
+    }
+
+    @ParameterizedTest
+    @CsvSource(
+        "3+6/3-(-10), 15.0",
+        "5+6, 11.0",
+        "5.0000000, 5.0",
+        "100/(10*10), 1.0",
+    )
+    fun `Test evaluating expression`(expression: String, expected: Double) {
+        val result = parser(expression).first()
+
+        val actual = result.value.eval()
+
+        assertThat(actual).isEqualTo(expected)
+    }
+}