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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 ParserIfTests {
@Test
public void canParseIfWithSingleConditionalBranchAndNoElse() {
var source = "if (a) { 1; }";
var node = parseString(source, Parser::parseTopLevelExpression);
assertThat(node, isUntypedIfNode(
isSequence(
isUntypedConditionalBranchNode(
isUntypedReferenceNode("a"),
isUntypedBlockNode(isSequence(
isUntypedExpressionStatementNode(isUntypedIntLiteralNode(1))
))
)
),
isUntypedBlockNode(isSequence())
));
}
@Test
public void canParseIfWithSingleConditionalBranchAndElse() {
var source = "if (a) { 1; } else { 2; }";
var node = parseString(source, Parser::parseTopLevelExpression);
assertThat(node, isUntypedIfNode(
isSequence(
isUntypedConditionalBranchNode(
isUntypedReferenceNode("a"),
isUntypedBlockNode(isSequence(
isUntypedExpressionStatementNode(isUntypedIntLiteralNode(1))
))
)
),
isUntypedBlockNode(isSequence(
isUntypedExpressionStatementNode(isUntypedIntLiteralNode(2))
))
));
}
@Test
public void canParseIfWithManyConditionalBranchesAndNoElse() {
var source = "if (a) { 1; } else if (b) { 2; }";
var node = parseString(source, Parser::parseTopLevelExpression);
assertThat(node, isUntypedIfNode(
isSequence(
isUntypedConditionalBranchNode(
isUntypedReferenceNode("a"),
isUntypedBlockNode(isSequence(
isUntypedExpressionStatementNode(isUntypedIntLiteralNode(1))
))
),
isUntypedConditionalBranchNode(
isUntypedReferenceNode("b"),
isUntypedBlockNode(isSequence(
isUntypedExpressionStatementNode(isUntypedIntLiteralNode(2))
))
)
),
isUntypedBlockNode(isSequence())
));
}
@Test
public void canParseIfWithManyConditionalBranchesAndElse() {
var source = "if (a) { 1; } else if (b) { 2; } else { 3; }";
var node = parseString(source, Parser::parseTopLevelExpression);
assertThat(node, isUntypedIfNode(
isSequence(
isUntypedConditionalBranchNode(
isUntypedReferenceNode("a"),
isUntypedBlockNode(isSequence(
isUntypedExpressionStatementNode(isUntypedIntLiteralNode(1))
))
),
isUntypedConditionalBranchNode(
isUntypedReferenceNode("b"),
isUntypedBlockNode(isSequence(
isUntypedExpressionStatementNode(isUntypedIntLiteralNode(2))
))
)
),
isUntypedBlockNode(isSequence(
isUntypedExpressionStatementNode(isUntypedIntLiteralNode(3))
))
));
}
}
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