Parse native function declarations

1 files changed, 60 insertions, 0 deletions

diff --git a/src/test/java/org/shedlang/compiler/parser/ParserNativeFunctionDeclarationTests.java b/src/test/java/org/shedlang/compiler/parser/ParserNativeFunctionDeclarationTests.java
new file mode 100644
index 00000000..f11a673c
--- /dev/null
+++ b/src/test/java/org/shedlang/compiler/parser/ParserNativeFunctionDeclarationTests.java
@@ -0,0 +1,60 @@
+package org.shedlang.compiler.parser;
+
+import org.junit.jupiter.api.Test;
+import org.shedlang.compiler.types.Visibility;
+
+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.isOptionalEmpty;
+import static org.zwobble.precisely.Matchers.isSequence;
+
+public class ParserNativeFunctionDeclarationTests {
+    @Test
+    public void canParseMinimalFunction() {
+        var source = """
+            native fun f() -> Unit;""";
+
+        var node = parseString(source, Parser::parseNamespaceStatement);
+
+        assertThat(
+            node,
+            isUntypedNativeFunctionDeclarationNode()
+                .withName("f")
+                .withSignature(
+                    isUntypedFunctionSignatureNode()
+                        .withParams(isUntypedParamsNode(isSequence(), isSequence()))
+                        .withEffect(isOptionalEmpty())
+                        .withReturnType(isUntypedTypeLevelReferenceNode("Unit"))
+                )
+        );
+    }
+
+    @Test
+    public void defaultVisibilityIsPrivate() {
+        var source = """
+            native fun f() -> Unit;""";
+
+        var node = parseString(source, Parser::parseNamespaceStatement);
+
+        assertThat(
+            node,
+            isUntypedNativeFunctionDeclarationNode()
+                .withVisibility(Visibility.PRIVATE)
+        );
+    }
+
+    @Test
+    public void whenFunIsPrefixedWithPubThenVisibilityIsPublic() {
+        var source = """
+            pub native fun f() -> Unit;""";
+
+        var node = parseString(source, Parser::parseNamespaceStatement);
+
+        assertThat(
+            node,
+            isUntypedNativeFunctionDeclarationNode()
+                .withVisibility(Visibility.PUBLIC)
+        );
+    }
+}