Type check int equals

3 files changed, 31 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 22da82bf..cd183ae4 100644
--- a/src/test/java/org/shedlang/compiler/ast/typed/TypedNodeMatchers.java
+++ b/src/test/java/org/shedlang/compiler/ast/typed/TypedNodeMatchers.java
@@ -60,6 +60,13 @@ public class TypedNodeMatchers {
         return isTypedBinaryOperationNode(TypedBinaryOperator.INT_ADD, left, right);
     }
 
+    public static Matcher<TypedExpressionNode> isTypedIntEqualsNode(
+        Matcher<TypedExpressionNode> left,
+        Matcher<TypedExpressionNode> right
+    ) {
+        return isTypedBinaryOperationNode(TypedBinaryOperator.INT_EQUALS, left, right);
+    }
+
     public static Matcher<TypedExpressionNode> isTypedIntLiteralNode(int value) {
         return isTypedIntLiteralNode(BigInteger.valueOf(value));
     }
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 b0cce55e..cee690b3 100644
--- a/src/test/java/org/shedlang/compiler/ast/untyped/Untyped.java
+++ b/src/test/java/org/shedlang/compiler/ast/untyped/Untyped.java
@@ -46,6 +46,18 @@ public class Untyped {
         );
     }
 
+    public static UntypedBinaryOperationNode equals(
+        UntypedExpressionNode left,
+        UntypedExpressionNode right
+    ) {
+        return new UntypedBinaryOperationNode(
+            UntypedBinaryOperator.EQUALS,
+            left,
+            right,
+            Sources.NULL
+        );
+    }
+
     public static UntypedExpressionStatementNode expressionStatement(UntypedExpressionNode expression) {
         return new UntypedExpressionStatementNode(expression, 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 98dd8679..63bb54c6 100644
--- a/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerBinaryOperationTests.java
+++ b/src/test/java/org/shedlang/compiler/typechecker/TypeCheckerBinaryOperationTests.java
@@ -21,6 +21,18 @@ public class TypeCheckerBinaryOperationTests {
         ));
         assertThat(typed.value().type(), equalTo(Types.INT));
     }
+    @Test
+    public void whenBothOperandsAreIntsAndOperatorIsEqualsThenIsTypedAsIntEquals() {
+        var untyped = Untyped.equals(Untyped.intLiteral(42), Untyped.intLiteral(47));
+
+        var typed = TypeChecker.typeCheckExpression(untyped, TypeCheckerContext.EMPTY);
+
+        assertThat(typed.value(), isTypedIntEqualsNode(
+            isTypedIntLiteralNode(42),
+            isTypedIntLiteralNode(47)
+        ));
+        assertThat(typed.value().type(), equalTo(Types.BOOL));
+    }
 
     @Test
     public void whenBothOperandsAreIntsAndOperatorIsSubThenIsTypedAsIntSub() {