Parse less than expressions

2 files changed, 28 insertions, 0 deletions

diff --git a/src/test/java/org/shedlang/compiler/ast/untyped/UntypedNodeMatchers.java b/src/test/java/org/shedlang/compiler/ast/untyped/UntypedNodeMatchers.java
index 24cb61ca..71c518b2 100644
--- a/src/test/java/org/shedlang/compiler/ast/untyped/UntypedNodeMatchers.java
+++ b/src/test/java/org/shedlang/compiler/ast/untyped/UntypedNodeMatchers.java
@@ -214,6 +214,13 @@ public class UntypedNodeMatchers {
         );
     }
 
+    public static Matcher<UntypedExpressionNode> isUntypedLessThanNode(
+        Matcher<UntypedExpressionNode> left,
+        Matcher<UntypedExpressionNode> right
+    ) {
+        return isUntypedBinaryOperationNode(UntypedBinaryOperator.LESS_THAN, left, right);
+    }
+
     public static Matcher<UntypedExpressionNode> isUntypedMemberAccessNode(
         Matcher<UntypedExpressionNode> receiver,
         String memberName
diff --git a/src/test/java/org/shedlang/compiler/parser/ParserLessThanTests.java b/src/test/java/org/shedlang/compiler/parser/ParserLessThanTests.java
new file mode 100644
index 00000000..7d87b162
--- /dev/null
+++ b/src/test/java/org/shedlang/compiler/parser/ParserLessThanTests.java
@@ -0,0 +1,21 @@
+package org.shedlang.compiler.parser;
+
+import org.junit.jupiter.api.Test;
+
+import static org.shedlang.compiler.ast.untyped.UntypedNodeMatchers.*;
+import static org.shedlang.compiler.parser.ParserTesting.parseString;
+import static org.zwobble.precisely.AssertThat.assertThat;
+
+public class ParserLessThanTests {
+    @Test
+    public void canParseLessThanExpression() {
+        var source = "1 < 2";
+
+        var node = parseString(source, Parser::parseTopLevelExpression);
+
+        assertThat(node, isUntypedLessThanNode(
+            isUntypedIntLiteralNode(1),
+            isUntypedIntLiteralNode(2)
+        ));
+    }
+}