From 4310c4a044b9d4477b0a15850b32ec25307613a2 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sat, 10 Jun 2023 11:26:30 +0100
Subject: Check number of positional args

---
 .../compiler/typechecker/TypeCheckerCallTests.java | 24 ++++++++++++++++++++++
 .../typechecker/TypeCheckerReferenceTests.java     |  1 +
 2 files changed, 25 insertions(+)

(limited to 'src/test/java')

diff --git a/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerCallTests.java b/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerCallTests.java
index 884a40c0..d8977b43 100644
--- a/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerCallTests.java
+++ b/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerCallTests.java
@@ -2,6 +2,8 @@ package org.shedlang.compiler.typechecker;
 
 import org.junit.jupiter.api.Test;
 import org.shedlang.compiler.ast.untyped.Untyped;
+import org.shedlang.compiler.typechecker.errors.UnexpectedTypeError;
+import org.shedlang.compiler.typechecker.errors.WrongNumberOfPositionalArgs;
 import org.shedlang.compiler.typechecker.typesets.TypeSets;
 import org.shedlang.compiler.types.FunctionType;
 import org.shedlang.compiler.types.Types;
@@ -162,4 +164,26 @@ public class TypeCheckerCallTests {
         assertThat(error.expected(), equalTo(TypeSets.type(Types.INT)));
         assertThat(error.actual(), equalTo(Types.STRING));
     }
+
+    @Test
+    public void whenWrongNumberOfPositionalArgsArePassedThenErrorIsThrown() {
+        var untyped = Untyped.call(
+            Untyped.reference("f"),
+            List.of(
+                Untyped.stringLiteral("hello")
+            )
+        );
+        var functionType = FunctionType.builder()
+            .build();
+        var context = TypeCheckerContext.EMPTY
+            .enter(P.map(Map.entry("f", functionType)));
+
+        var error = assertThrows(
+            WrongNumberOfPositionalArgs.class,
+            () -> TypeChecker.typeCheckExpression(untyped, context)
+        );
+
+        assertThat(error.expected(), equalTo(0));
+        assertThat(error.actual(), equalTo(1));
+    }
 }
diff --git a/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerReferenceTests.java b/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerReferenceTests.java
index 2e1d3066..659514f2 100644
--- a/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerReferenceTests.java
+++ b/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerReferenceTests.java
@@ -2,6 +2,7 @@ package org.shedlang.compiler.typechecker;
 
 import org.junit.jupiter.api.Test;
 import org.shedlang.compiler.ast.untyped.Untyped;
+import org.shedlang.compiler.typechecker.errors.UnknownVariableError;
 import org.shedlang.compiler.types.Types;
 import org.shedlang.compiler.util.P;
 
-- 
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