src/test/java/org/zwobble/hobgoblin/compiler/parser/ParserEnumDefinitionTests.java


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package org.zwobble.hobgoblin.compiler.parser;

import org.junit.jupiter.api.Test;

import static org.zwobble.hobgoblin.compiler.ast.untyped.UntypedEnumDefinitionNodeMatcher.isUntypedEnumDefinitionNode;
import static org.zwobble.hobgoblin.compiler.ast.untyped.UntypedEnumVariantDefinitionNodeMatcher.isUntypedEnumVariantDefinitionNode;
import static org.zwobble.hobgoblin.compiler.parser.ParserTesting.parseString;
import static org.zwobble.precisely.AssertThat.assertThat;
import static org.zwobble.precisely.Matchers.equalTo;
import static org.zwobble.precisely.Matchers.isSequence;

public class ParserEnumDefinitionTests {
    @Test
    public void nameIsParsed() {
        var source = """
            enum SmallNumber {
            }""";

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

        assertThat(node, isUntypedEnumDefinitionNode()
            .withName(equalTo("SmallNumber"))
        );
    }

    @Test
    public void emptyEnumHasNoVariants() {
        var source = """
            enum SmallNumber {
            }""";

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

        assertThat(node, isUntypedEnumDefinitionNode()
            .withVariants(isSequence())
        );
    }

    @Test
    public void enumWithVariants() {
        var source = """
            enum SmallNumber {
                variant zero;
                variant one;
            }""";

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

        assertThat(node, isUntypedEnumDefinitionNode()
            .withVariants(isSequence(
                isUntypedEnumVariantDefinitionNode().withName(equalTo("zero")),
                isUntypedEnumVariantDefinitionNode().withName(equalTo("one"))
            ))
        );
    }
}