Functionality for indexing tables

UpsilonTests/TableTests.cs

@@ -0,0 +1,81 @@
+using Upsilon.Evaluator;
+using Xunit;
+
+namespace UpsilonTests
+{
+    public class TableTests
+    {
+        [Fact]
+        public void BasicNumberTable()
+        {
+            const string input = @"
+table = {
+    100, 200, 300
+}
+return table[2]
+";
+            var script = new Script(input);
+            Assert.Empty(script.Diagnostics.Messages);
+            var evaluated = script.Evaluate<long>();
+            Assert.Empty(script.Diagnostics.Messages);
+            Assert.Equal(200, evaluated);
+        }
+
+        [Fact]
+        public void BasicStringTable()
+        {
+            const string input = @"
+table = {
+    test = 100,
+    val = 400,
+    another = 10_000,
+}
+return table[""another""]
+";
+            var script = new Script(input);
+            Assert.Empty(script.Diagnostics.Messages);
+            var evaluated = script.Evaluate<long>();
+            Assert.Empty(script.Diagnostics.Messages);
+            Assert.Equal(10_000, evaluated);
+        }
+
+        [Fact]
+        public void HidesLocalKeys()
+        {
+            const string input = @"
+table = {
+    local test = 100,
+    val = 400,
+    another = 10_000,
+}
+return table[""test""]
+";
+            var script = new Script(input);
+            Assert.Empty(script.Diagnostics.Messages);
+            var evaluated = script.Evaluate();
+            Assert.Empty(script.Diagnostics.Messages);
+            Assert.Null(evaluated);
+        }
+
+        [Fact]
+        public void FunctionsInTable()
+        {
+            const string input = @"
+table = {
+    function() test
+        return 100
+    end
+    val = 400,
+    another = 10_000,
+}
+return table[""test""]()
+";
+            var script = new Script(input);
+            Assert.Empty(script.Diagnostics.Messages);
+            var evaluated = script.Evaluate<long>();
+            Assert.Empty(script.Diagnostics.Messages);
+            Assert.Equal(100, evaluated);
+        }
+
+    }
+}