2 files changed, 32 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 0f9bc3a2..564d7609 100644
--- a/src/test/java/org/shedlang/compiler/ast/untyped/UntypedNodeMatchers.java
+++ b/src/test/java/org/shedlang/compiler/ast/untyped/UntypedNodeMatchers.java
@@ -17,6 +17,17 @@ public class UntypedNodeMatchers {
         return isUntypedBinaryOperationNode(UntypedBinaryOperator.ADD, left, right);
     }
 
+    public static Matcher<UntypedNode> isUntypedAssignNode(
+        Matcher<UntypedTargetNode> target,
+        Matcher<UntypedExpressionNode> expression
+    ) {
+        return instanceOf(
+            UntypedAssignNode.class,
+            has("target", x -> x.target(), target),
+            has("expression", x -> x.expression(), expression)
+        );
+    }
+
     public static UntypedArgsNodeMatcher isUntypedArgsNode() {
         return UntypedArgsNodeMatcher.empty();
     }
diff --git a/src/test/java/org/shedlang/compiler/parser/ParserAssignTests.java b/src/test/java/org/shedlang/compiler/parser/ParserAssignTests.java
new file mode 100644
index 00000000..ce8c68d3
--- /dev/null
+++ b/src/test/java/org/shedlang/compiler/parser/ParserAssignTests.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 ParserAssignTests {
+    @Test
+    public void canParseAssignAsFunctionStatement() {
+        var source = "assign x := y;";
+
+        var node = parseString(source, Parser::parseFunctionStatement);
+
+        assertThat(node, isUntypedAssignNode(
+            isUntypedTargetVariableNode("x"),
+            isUntypedReferenceNode("y")
+        ));
+    }
+}