test: nameof() parsing & evaluation

Heir.Tests/ParserTest.cs

@@ -45,6 +45,23 @@ public void DoesNotThrowWith(string input)
         var tree = Parse(input);
         Assert.Empty(tree.Diagnostics);
     }
+
+    [Theory]
+    [InlineData("interface Abc; nameof(Abc);", "Abc")]
+    [InlineData("let x = 1; nameof(x);", "x")]
+    public void Parses_NameOf(string input, string expectedName)
+    {
+        var tree = Parse(input);
+        var statement = tree.Statements.Last();
+        Assert.IsType<ExpressionStatement>(statement);
+
+        var expressionStatement = (ExpressionStatement)statement;
+        Assert.IsType<Literal>(expressionStatement.Expression);
+
+        var literal = (Literal)expressionStatement.Expression;
+        Assert.Equal(SyntaxKind.StringLiteral, literal.Token.Kind);
+        Assert.Equal(expectedName, literal.Token.Value);
+    }
 
     [Fact]
     public void Parses_EmptyInterfaces()

Heir.Tests/VirtualMachineTest.cs

@@ -13,6 +13,15 @@ public void ThrowsWith(string input, DiagnosticCode expectedDiagnosticCode)
         Assert.True(vm.Diagnostics.HasErrors);
         Assert.Contains(vm.Diagnostics, diagnostic => diagnostic.Code == expectedDiagnosticCode);
     }
+
+    [Theory]
+    [InlineData("interface Abc; nameof(Abc);", "Abc")]
+    [InlineData("let x = 1; nameof(x);", "x")]
+    public void Evaluates_NameOf(string input, string expectedValue)
+    {
+        var (value, _) = Evaluate(input);
+        Assert.Equal(expectedValue, value);
+    }
 
     [Fact]
     public void Evaluates_MutableInterfaces()