3 files changed, 34 insertions, 0 deletions
diff --git a/src/test/java/org/shedlang/compiler/ast/typed/TypedNodeMatchers.java b/src/test/java/org/shedlang/compiler/ast/typed/TypedNodeMatchers.java
index cd183ae4..9b432d5e 100644
--- a/src/test/java/org/shedlang/compiler/ast/typed/TypedNodeMatchers.java
+++ b/src/test/java/org/shedlang/compiler/ast/typed/TypedNodeMatchers.java
@@ -78,6 +78,13 @@ public class TypedNodeMatchers {
         );
     }
 
+    public static Matcher<TypedExpressionNode> isTypedIntNotEqualNode(
+        Matcher<TypedExpressionNode> left,
+        Matcher<TypedExpressionNode> right
+    ) {
+        return isTypedBinaryOperationNode(TypedBinaryOperator.INT_NOT_EQUAL, left, right);
+    }
+
     public static Matcher<TypedExpressionNode> isTypedIntSubNode(
         Matcher<TypedExpressionNode> left,
         Matcher<TypedExpressionNode> right
diff --git a/src/test/java/org/shedlang/compiler/ast/untyped/Untyped.java b/src/test/java/org/shedlang/compiler/ast/untyped/Untyped.java
index cee690b3..6465f27a 100644
--- a/src/test/java/org/shedlang/compiler/ast/untyped/Untyped.java
+++ b/src/test/java/org/shedlang/compiler/ast/untyped/Untyped.java
@@ -85,6 +85,18 @@ public class Untyped {
         return namespace(NamespaceName.of("DefaultNamespaceName"), body);
     }
 
+    public static UntypedBinaryOperationNode notEqual(
+        UntypedExpressionNode left,
+        UntypedExpressionNode right
+    ) {
+        return new UntypedBinaryOperationNode(
+            UntypedBinaryOperator.NOT_EQUAL,
+            left,
+            right,
+            Sources.NULL
+        );
+    }
+
     public static UntypedReferenceNode reference(String name) {
         return new UntypedReferenceNode(name, Sources.NULL);
     }
diff --git a/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerBinaryOperationTests.java b/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerBinaryOperationTests.java
index 63bb54c6..d752fe94 100644
--- a/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerBinaryOperationTests.java
+++ b/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerBinaryOperationTests.java
@@ -21,6 +21,7 @@ public class TypeCheckerBinaryOperationTests {
         ));
         assertThat(typed.value().type(), equalTo(Types.INT));
     }
+
     @Test
     public void whenBothOperandsAreIntsAndOperatorIsEqualsThenIsTypedAsIntEquals() {
         var untyped = Untyped.equals(Untyped.intLiteral(42), Untyped.intLiteral(47));
@@ -35,6 +36,20 @@ public class TypeCheckerBinaryOperationTests {
     }
 
     @Test
+    public void whenBothOperandsAreIntsAndOperatorIsNotEqualThenIsTypedAsIntNotEqual() {
+        var untyped = Untyped.notEqual(Untyped.intLiteral(42), Untyped.intLiteral(47));
+
+        var typed = TypeChecker.typeCheckExpression(untyped, TypeCheckerContext.EMPTY);
+
+        assertThat(typed.value(), isTypedIntNotEqualNode(
+            isTypedIntLiteralNode(42),
+            isTypedIntLiteralNode(47)
+        ));
+        assertThat(typed.value().type(), equalTo(Types.BOOL));
+    }
+
+
+    @Test
     public void whenBothOperandsAreIntsAndOperatorIsSubThenIsTypedAsIntSub() {
         var untyped = Untyped.sub(Untyped.intLiteral(42), Untyped.intLiteral(47));