Parser: Plus and Minus with numbers.

2019-12-01 03:12:20 +01:00
parent bdf675f592
commit e02a267949
6 changed files with 151 additions and 0 deletions
--- a/VAR.ExpressionEvaluator.Tests/ParserTests.cs
+++ b/VAR.ExpressionEvaluator.Tests/ParserTests.cs
@@ -0,0 +1,40 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace VAR.ExpressionEvaluator.Tests
+{
+    [TestClass()]
+    public class ParserTests
+    {
+        [TestMethod()]
+        public void ParseString__Ten_EqualsTen()
+        {
+            string expression = "10";
+            object result = Parser.EvaluateString(expression);
+            Assert.AreEqual(10m, result);
+        }
+
+        [TestMethod()]
+        public void ParseString__OnePlusTwo_EqualsThree()
+        {
+            string expression = "1   + 2";
+            object result = Parser.EvaluateString(expression);
+            Assert.AreEqual(3m, result);
+        }
+
+        [TestMethod()]
+        public void ParseString__OneMinusTwo_EqualsMinusOne()
+        {
+            string expression = "1   - 2";
+            object result = Parser.EvaluateString(expression);
+            Assert.AreEqual(-1m, result);
+        }
+
+        [TestMethod()]
+        public void ParseString__OneMillionMinusHundredThousands_EqualsNineHundredThousands()
+        {
+            string expression = "1000000   - 100000";
+            object result = Parser.EvaluateString(expression);
+            Assert.AreEqual(900000m, result);
+        }
+    }
+}