From ac6d1c7018ef715772f43a9ed6e4cef029b17302 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sun, 29 Oct 2023 20:48:15 +0000
Subject: Throw error if function definition is missing param type

---
 .../typechecker/TypeCheckerFunctionDefinitionTests.java | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'src/test/java')

diff --git a/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerFunctionDefinitionTests.java b/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerFunctionDefinitionTests.java
index 1ee2546a..590beb7f 100644
--- a/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerFunctionDefinitionTests.java
+++ b/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerFunctionDefinitionTests.java
@@ -3,6 +3,7 @@ package org.shedlang.compiler.typechecker;
 import org.junit.jupiter.api.Test;
 import org.shedlang.compiler.ast.untyped.Untyped;
 import org.shedlang.compiler.ast.untyped.UntypedFunctionDefinitionNode;
+import org.shedlang.compiler.typechecker.errors.FunctionSignatureMissingParamTypeError;
 import org.shedlang.compiler.typechecker.errors.FunctionSignatureMissingReturnTypeError;
 import org.shedlang.compiler.types.Effects;
 import org.shedlang.compiler.types.FunctionType;
@@ -11,6 +12,7 @@ import org.shedlang.compiler.util.P;
 
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
 
 import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.shedlang.compiler.ast.typed.TypedNodeMatchers.*;
@@ -55,4 +57,19 @@ public class TypeCheckerFunctionDefinitionTests {
             () -> typeCheckNamespaceStatement(untyped, context)
         );
     }
+
+    @Test
+    public void whenSignatureIsMissingParamTypeThenErrorIsThrown() {
+        var untyped = UntypedFunctionDefinitionNode.builder()
+            .addPositionalParam("x", Optional.empty())
+            .withReturnType(Untyped.typeLevelReference("Unit"))
+            .build();
+        var context = TypeCheckerContext.EMPTY
+            .enterGlobal(P.map(Map.entry("Unit", Types.metaType(Types.UNIT))));
+
+        assertThrows(
+            FunctionSignatureMissingParamTypeError.class,
+            () -> typeCheckNamespaceStatement(untyped, context)
+        );
+    }
 }
-- 
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