1 files changed, 47 insertions, 2 deletions
diff --git a/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerCallTests.java b/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerCallTests.java
index d8977b43..c46587c3 100644
--- a/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerCallTests.java
+++ b/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerCallTests.java
@@ -2,8 +2,10 @@ package org.shedlang.compiler.typechecker;
 
 import org.junit.jupiter.api.Test;
 import org.shedlang.compiler.ast.untyped.Untyped;
+import org.shedlang.compiler.typechecker.errors.MissingNamedArgError;
+import org.shedlang.compiler.typechecker.errors.UnexpectedNamedArgError;
 import org.shedlang.compiler.typechecker.errors.UnexpectedTypeError;
-import org.shedlang.compiler.typechecker.errors.WrongNumberOfPositionalArgs;
+import org.shedlang.compiler.typechecker.errors.WrongNumberOfPositionalArgsError;
 import org.shedlang.compiler.typechecker.typesets.TypeSets;
 import org.shedlang.compiler.types.FunctionType;
 import org.shedlang.compiler.types.Types;
@@ -179,11 +181,54 @@ public class TypeCheckerCallTests {
             .enter(P.map(Map.entry("f", functionType)));
 
         var error = assertThrows(
-            WrongNumberOfPositionalArgs.class,
+            WrongNumberOfPositionalArgsError.class,
             () -> TypeChecker.typeCheckExpression(untyped, context)
         );
 
         assertThat(error.expected(), equalTo(0));
         assertThat(error.actual(), equalTo(1));
     }
+
+    @Test
+    public void whenNamedArgumentIsMissingThenErrorIsThrown() {
+        var untyped = Untyped.call(
+            Untyped.reference("f"),
+            List.of(),
+            List.of()
+        );
+        var functionType = FunctionType.builder()
+            .addNamedParam("x", Types.STRING)
+            .build();
+        var context = TypeCheckerContext.EMPTY
+            .enter(P.map(Map.entry("f", functionType)));
+
+        var error = assertThrows(
+            MissingNamedArgError.class,
+            () -> TypeChecker.typeCheckExpression(untyped, context)
+        );
+
+        assertThat(error.argName(), equalTo("x"));
+    }
+
+    @Test
+    public void whenExtraNamedArgumentIsPassedThenErrorIsThrown() {
+        var untyped = Untyped.call(
+            Untyped.reference("f"),
+            List.of(),
+            List.of(
+                Untyped.namedArg("x", Untyped.stringLiteral("hello"))
+            )
+        );
+        var functionType = FunctionType.builder()
+            .build();
+        var context = TypeCheckerContext.EMPTY
+            .enter(P.map(Map.entry("f", functionType)));
+
+        var error = assertThrows(
+            UnexpectedNamedArgError.class,
+            () -> TypeChecker.typeCheckExpression(untyped, context)
+        );
+
+        assertThat(error.argName(), equalTo("x"));
+    }
 }