1 files changed, 102 insertions, 0 deletions
diff --git a/test/moe/anita/mai/lexer/LexerStringTest.java b/test/moe/anita/mai/lexer/LexerStringTest.java
new file mode 100644
index 0000000..4707264
--- /dev/null
+++ b/test/moe/anita/mai/lexer/LexerStringTest.java
@@ -0,0 +1,102 @@
+package moe.anita.mai.lexer;
+
+import moe.anita.mai.buffer.MemBuf;
+import moe.anita.mai.test.Case;
+import moe.anita.mai.test.Runner;
+import moe.anita.mai.token.TokenKind;
+
+@Runner(name = "Lexer Strings")
+public final class LexerStringTest {
+
+	@Case(name = "string literal")
+	static void string() {
+		var lexer = lexer("\"hello\"");
+
+		assert lexer.next().kind() == TokenKind.STRING;
+		assert lexer.next().kind() == TokenKind.EOF;
+	}
+
+	@Case(name = "empty string")
+	static void emptyString() {
+		var lexer = lexer("\"\"");
+
+		assert lexer.next().kind() == TokenKind.STRING;
+		assert lexer.next().kind() == TokenKind.EOF;
+	}
+
+	@Case(name = "escaped quote")
+	static void escapedQuote() {
+		var lexer = lexer("\"hello \\\"mai\\\"\"");
+
+		assert lexer.next().kind() == TokenKind.STRING;
+		assert lexer.next().kind() == TokenKind.EOF;
+	}
+
+	@Case(name = "escaped backslash")
+	static void escapedBackslash() {
+		var lexer = lexer("\"foo\\\\bar\"");
+
+		assert lexer.next().kind() == TokenKind.STRING;
+		assert lexer.next().kind() == TokenKind.EOF;
+	}
+
+	@Case(name = "unterminated string")
+	static void unterminatedString() {
+		var lexer = lexer("\"hello");
+
+		assert lexer.next().kind() == TokenKind.ERROR;
+		assert lexer.next().kind() == TokenKind.EOF;
+	}
+
+	@Case(name = "string cannot cross newline")
+	static void stringNewline() {
+		var lexer = lexer("\"hello\nworld\"");
+
+		assert lexer.next().kind() == TokenKind.ERROR;
+	}
+
+	@Case(name = "rune literal")
+	static void rune() {
+		var lexer = lexer("'a'");
+
+		assert lexer.next().kind() == TokenKind.RUNE;
+		assert lexer.next().kind() == TokenKind.EOF;
+	}
+
+	@Case(name = "escaped rune")
+	static void escapedRune() {
+		var lexer = lexer("'\\n'");
+
+		assert lexer.next().kind() == TokenKind.RUNE;
+		assert lexer.next().kind() == TokenKind.EOF;
+	}
+
+	@Case(name = "quote rune")
+	static void quoteRune() {
+		var lexer = lexer("'\\''");
+
+		assert lexer.next().kind() == TokenKind.RUNE;
+		assert lexer.next().kind() == TokenKind.EOF;
+	}
+
+	@Case(name = "empty rune is invalid")
+	static void emptyRune() {
+		var lexer = lexer("''");
+
+		assert lexer.next().kind() == TokenKind.ERROR;
+	}
+
+	@Case(name = "multiple characters are invalid rune")
+	static void multipleRune() {
+		var lexer = lexer("'ab'");
+
+		assert lexer.next().kind() == TokenKind.ERROR;
+	}
+
+	private static Lexer lexer(String source) {
+		return new Lexer(new MemBuf(source));
+	}
+
+	private LexerStringTest() {
+	}
+}