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 ParserAssignTests {
    @Test
    public void canParseSetAsFunctionStatement() {
        var source = "set x = y;";

        var node = parseString(source, Parser::parseFunctionStatement);

        assertThat(node, isUntypedAssignNode(
            isUntypedTargetReassignNode("x"),
            isUntypedReferenceNode("y")
        ));
    }

    @Test
    public void canParseTupleTarget() {
        var source = "#(val x, set y) = z;";

        var node = parseString(source, Parser::parseFunctionStatement);

        assertThat(node, isUntypedAssignNode(
            isUntypedTargetTupleNode(isSequence(
                isUntypedTargetValNode("x"),
                isUntypedTargetReassignNode("y")
            )),
            isUntypedReferenceNode("z")
        ));
    }

    @Test
    public void canParseIgnoreTarget() {
        var source = "_ = x;";

        var node = parseString(source, Parser::parseFunctionStatement);

        assertThat(node, isUntypedAssignNode(
            isUntypedTargetIgnoreNode(),
            isUntypedReferenceNode("x")
        ));
    }
}