Parse while loops

2 files changed, 40 insertions, 1 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 a05c8e55..a5d4e693 100644
--- a/src/test/java/org/shedlang/compiler/ast/untyped/UntypedNodeMatchers.java
+++ b/src/test/java/org/shedlang/compiler/ast/untyped/UntypedNodeMatchers.java
@@ -59,7 +59,6 @@ public class UntypedNodeMatchers {
             has("expression", x -> x.expression(), expression)
         );
     }
-
     public static Matcher<UntypedExpressionNode> isUntypedBoolLiteralNode(boolean value) {
         return instanceOf(
             UntypedBoolLiteralNode.class,
@@ -226,4 +225,15 @@ public class UntypedNodeMatchers {
             has("expression", x -> x.expression(), expression)
         );
     }
+
+    public static Matcher<UntypedFunctionStatementNode> isUntypedWhileNode(
+        Matcher<UntypedExpressionNode> condition,
+        Matcher<UntypedBlockNode> body
+    ) {
+        return instanceOf(
+            UntypedWhileNode.class,
+            has("condition", x -> x.condition(), condition),
+            has("body", x -> x.body(), body)
+        );
+    }
 }
diff --git a/src/test/java/org/shedlang/compiler/parser/ParserWhileTests.java b/src/test/java/org/shedlang/compiler/parser/ParserWhileTests.java
new file mode 100644
index 00000000..8382f2fa
--- /dev/null
+++ b/src/test/java/org/shedlang/compiler/parser/ParserWhileTests.java
@@ -0,0 +1,29 @@
+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;
+import static org.zwobble.precisely.Matchers.isSequence;
+
+public class ParserWhileTests {
+    @Test
+    public void canParseWhile() {
+        var source = """
+            while (true) {
+                f();
+            }""";
+
+        var node = parseString(source, Parser::parseFunctionStatement);
+
+        assertThat(node, isUntypedWhileNode(
+            isUntypedBoolLiteralNode(true),
+            isUntypedBlockNode(isSequence(
+                isUntypedExpressionStatementNode(
+                    isUntypedCallNode().withReceiver(isUntypedReferenceNode("f"))
+                )
+            ))
+        ));
+    }
+}