#201 - parsing tests

Author: Stepami

tests/HydraScript.UnitTests/Domain/FrontEnd/ParserData.cs

@@ -1,3 +1,7 @@
+using HydraScript.Domain.FrontEnd.Parser;
+using HydraScript.Domain.FrontEnd.Parser.Impl.Ast.Nodes.Expressions;
+using HydraScript.Domain.FrontEnd.Parser.Impl.Ast.Nodes.Expressions.PrimaryExpressions;
+
 namespace HydraScript.UnitTests.Domain.FrontEnd;
 
 public sealed class ParserSuccessTestData : TheoryData<string>
@@ -18,4 +22,30 @@ public ParserSuccessTestData()
         Add("while (~arr != 0) { arr::0 continue }");
         Add("if (!(true || (false && false))) { break } else { break }");
     }
+}
+
+public sealed class ParserExpectedAstTestData : TheoryData<string, Action<IAbstractSyntaxTree>>
+{
+    public ParserExpectedAstTestData()
+    {
+        Add(
+            "$ENV_VAR = \"VALUE\"",
+            ast =>
+            {
+                var assignment = ast.Root.GetAllNodes().OfType<AssignmentExpression>().Single();
+                assignment.Destination.Id.Should().BeOfType<EnvVarReference>()
+                    .Which.Name.Should().Be("ENV_VAR");
+                assignment.Source.Should().BeOfType<Literal>();
+            });
+
+        Add(
+            "let envVarValue = $ENV_VAR",
+            ast =>
+            {
+                var assignment = ast.Root.GetAllNodes().OfType<AssignmentExpression>().Single();
+                assignment.Destination.Id.Name.Should().Be("envVarValue");
+                assignment.Source.Should().BeOfType<EnvVarReference>()
+                    .Which.Name.Should().Be("ENV_VAR");
+            });
+    }
 }

tests/HydraScript.UnitTests/Domain/FrontEnd/TopDownParserTests.cs

@@ -1,4 +1,5 @@
 using HydraScript.Domain.FrontEnd.Lexer.Impl;
+using HydraScript.Domain.FrontEnd.Parser;
 using HydraScript.Domain.FrontEnd.Parser.Impl;
 
 namespace HydraScript.UnitTests.Domain.FrontEnd;
@@ -16,4 +17,12 @@ public void Parse_Always_DoesNotThrow(string text)
         var ex = Record.Exception(() => _parser.Parse(text));
         Assert.Null(ex);
     }
+
+    [Theory]
+    [ClassData(typeof(ParserExpectedAstTestData))]
+    public void Parse_Always_Expected(string text, Action<IAbstractSyntaxTree> assert)
+    {
+        var actual = _parser.Parse(text);
+        assert(actual);
+    }
 }