100 lines
3.2 KiB
Java
100 lines
3.2 KiB
Java
package scanner;
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import static org.junit.Assert.assertEquals;
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import java.io.IOException;
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import java.io.InputStream;
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import org.junit.Test;
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import scanner.Token.Type;
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import testutils.TestUtilities;
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public class LispScannerTypeTester {
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@Test
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public void givenEmptyFile_returnsCorrectTokenTypes() throws IOException {
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String input = "";
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Token.Type[] expectedTypes = {};
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assertTokenTypesMatch(input, expectedTypes);
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}
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@Test
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public void givenNil_returnsCorrectTokenTypes() throws IOException {
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String input = "()";
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Token.Type[] expectedTypes = { Type.LEFT_PAREN, Type.RIGHT_PAREN };
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assertTokenTypesMatch(input, expectedTypes);
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}
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@Test
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public void givenListOfNumbers_returnsCorrectTokenTypes() throws IOException {
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String input = "(1 2)";
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Token.Type[] expectedTypes = { Type.LEFT_PAREN, Type.NUMBER, Type.NUMBER, Type.RIGHT_PAREN };
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assertTokenTypesMatch(input, expectedTypes);
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}
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@Test
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public void givenString_returnsCorrectTokenTypes() throws IOException {
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String input = "\"string\"";
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Token.Type[] expectedTypes = { Type.STRING };
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assertTokenTypesMatch(input, expectedTypes);
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}
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@Test
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public void givenStringWithEscapedDoubleQuote_returnsCorrectTokenTypes() throws IOException {
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String input = "\"string \n hi \\\" bye\"";
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Token.Type[] expectedTypes = { Type.STRING };
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assertTokenTypesMatch(input, expectedTypes);
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}
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@Test
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public void givenStringWithEscapedDoubleQuoteAndComment_returnsCorrectTokenTypes() throws IOException {
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String input = "\"string \n hi \\\" ; bye\"";
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Token.Type[] expectedTypes = { Type.STRING };
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assertTokenTypesMatch(input, expectedTypes);
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}
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@Test
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public void givenIdentifier_returnsCorrectTokenTypes() throws IOException {
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String input = "abcdefgHIJKLMNOP1234";
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Token.Type[] expectedTypes = { Type.IDENTIFIER };
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assertTokenTypesMatch(input, expectedTypes);
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}
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@Test
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public void givenQuote_returnsCorrectTokenTypes() throws IOException {
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String input = "'";
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Token.Type[] expectedTypes = { Type.QUOTE_MARK };
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assertTokenTypesMatch(input, expectedTypes);
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}
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@Test
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public void givenFunctionCall_returnsCorrectTokenTypes() throws IOException {
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String input = "(defun myFunction (x)\n (print x))";
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Token.Type[] expectedTypes = { Type.LEFT_PAREN, Type.IDENTIFIER, Type.IDENTIFIER, Type.LEFT_PAREN,
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Type.IDENTIFIER, Type.RIGHT_PAREN, Type.LEFT_PAREN, Type.IDENTIFIER,
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Type.IDENTIFIER, Type.RIGHT_PAREN, Type.RIGHT_PAREN };
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assertTokenTypesMatch(input, expectedTypes);
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}
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private void assertTokenTypesMatch(String input, Token.Type[] expectedTypeList) throws IOException {
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InputStream stringInputStream = TestUtilities.createInputStreamFromString(input);
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LispScanner lispScanner = new LispScanner(stringInputStream, "stringInputStream");
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for (Token.Type expectedType : expectedTypeList)
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assertEquals(expectedType, lispScanner.nextToken().getType());
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assertEquals(Token.Type.EOF, lispScanner.nextToken().getType());
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}
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}
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