Parse addition

2 files changed, 34 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 1f74008d..e7c8d01c 100644
--- a/src/test/java/org/shedlang/compiler/ast/untyped/UntypedNodeMatchers.java
+++ b/src/test/java/org/shedlang/compiler/ast/untyped/UntypedNodeMatchers.java
@@ -10,6 +10,18 @@ public class UntypedNodeMatchers {
     private UntypedNodeMatchers() {
     }
 
+    public static Matcher<UntypedExpressionNode> isUntypedAddNode(
+        Matcher<UntypedExpressionNode> left,
+        Matcher<UntypedExpressionNode> right
+    ) {
+        return instanceOf(
+            UntypedBinaryOperationNode.class,
+            has("operator", x -> x.operator(), equalTo(UntypedBinaryOperator.ADD)),
+            has("left", x -> x.left(), left),
+            has("right", x -> x.right(), right)
+        );
+    }
+
     public static UntypedArgsNodeMatcher isUntypedArgsNode() {
         return UntypedArgsNodeMatcher.empty();
     }
diff --git a/src/test/java/org/shedlang/compiler/parser/ParserAddTests.java b/src/test/java/org/shedlang/compiler/parser/ParserAddTests.java
new file mode 100644
index 00000000..0195c0ae
--- /dev/null
+++ b/src/test/java/org/shedlang/compiler/parser/ParserAddTests.java
@@ -0,0 +1,22 @@
+package org.shedlang.compiler.parser;
+
+import org.junit.jupiter.api.Test;
+
+import static org.shedlang.compiler.ast.untyped.UntypedNodeMatchers.isUntypedAddNode;
+import static org.shedlang.compiler.ast.untyped.UntypedNodeMatchers.isUntypedIntLiteralNode;
+import static org.shedlang.compiler.parser.ParserTesting.parseString;
+import static org.zwobble.precisely.AssertThat.assertThat;
+
+public class ParserAddTests {
+    @Test
+    public void canParseAdditionOfTwoPrimaryExpressions() {
+        var source = "1 + 2";
+
+        var node = parseString(source, Parser::parseTopLevelExpression);
+
+        assertThat(node, isUntypedAddNode(
+            isUntypedIntLiteralNode(1),
+            isUntypedIntLiteralNode(2)
+        ));
+    }
+}