Merge pull request #2571 from Diffblue-benchmarks/add-diffblue-tests

Add unit tests for org.antlr.v4.misc.CharSupport

tool-testsuite/test/org/antlr/v4/test/tool/CharSupportTest.java

@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2012-2019 The ANTLR Project. All rights reserved.
+ * Use of this file is governed by the BSD 3-clause license that
+ * can be found in the LICENSE.txt file in the project root.
+ */
+
+package org.antlr.v4.test.tool;
+
+import org.antlr.v4.misc.CharSupport;
+import org.antlr.v4.runtime.misc.IntervalSet;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class CharSupportTest {
+
+	@Test
+	public void testGetANTLRCharLiteralForChar() {
+		Assert.assertEquals("'<INVALID>'",
+			CharSupport.getANTLRCharLiteralForChar(-1));
+		Assert.assertEquals("'\\n'",
+			CharSupport.getANTLRCharLiteralForChar('\n'));
+		Assert.assertEquals("'\\\\'",
+			CharSupport.getANTLRCharLiteralForChar('\\'));
+		Assert.assertEquals("'\\''",
+			CharSupport.getANTLRCharLiteralForChar('\''));
+		Assert.assertEquals("'b'",
+			CharSupport.getANTLRCharLiteralForChar('b'));
+		Assert.assertEquals("'\\uFFFF'",
+			CharSupport.getANTLRCharLiteralForChar(0xFFFF));
+		Assert.assertEquals("'\\u{10FFFF}'",
+			CharSupport.getANTLRCharLiteralForChar(0x10FFFF));
+	}
+
+	@Test
+	public void testGetCharValueFromGrammarCharLiteral() {
+		Assert.assertEquals(-1,
+			CharSupport.getCharValueFromGrammarCharLiteral(null));
+		Assert.assertEquals(-1,
+			CharSupport.getCharValueFromGrammarCharLiteral(""));
+		Assert.assertEquals(-1,
+			CharSupport.getCharValueFromGrammarCharLiteral("b"));
+		Assert.assertEquals(111,
+			CharSupport.getCharValueFromGrammarCharLiteral("foo"));
+	}
+
+	@Test
+	public void testGetStringFromGrammarStringLiteral() {
+		Assert.assertNull(CharSupport
+			.getStringFromGrammarStringLiteral("foo\\u{bbb"));
+		Assert.assertNull(CharSupport
+			.getStringFromGrammarStringLiteral("foo\\u{[]bb"));
+		Assert.assertNull(CharSupport
+			.getStringFromGrammarStringLiteral("foo\\u[]bb"));
+		Assert.assertNull(CharSupport
+			.getStringFromGrammarStringLiteral("foo\\ubb"));
+
+		Assert.assertEquals("oo»b", CharSupport
+			.getStringFromGrammarStringLiteral("foo\\u{bb}bb"));
+	}
+
+	@Test
+	public void testGetCharValueFromCharInGrammarLiteral() {
+		Assert.assertEquals(102,
+			CharSupport.getCharValueFromCharInGrammarLiteral("f"));
+
+		Assert.assertEquals(-1,
+			CharSupport.getCharValueFromCharInGrammarLiteral("\' "));
+		Assert.assertEquals(-1,
+			CharSupport.getCharValueFromCharInGrammarLiteral("\\ "));
+		Assert.assertEquals(39,
+			CharSupport.getCharValueFromCharInGrammarLiteral("\\\'"));
+		Assert.assertEquals(10,
+			CharSupport.getCharValueFromCharInGrammarLiteral("\\n"));
+
+		Assert.assertEquals(-1,
+			CharSupport.getCharValueFromCharInGrammarLiteral("foobar"));
+		Assert.assertEquals(4660,
+			CharSupport.getCharValueFromCharInGrammarLiteral("\\u1234"));
+		Assert.assertEquals(18,
+			CharSupport.getCharValueFromCharInGrammarLiteral("\\u{12}"));
+
+		Assert.assertEquals(-1,
+			CharSupport.getCharValueFromCharInGrammarLiteral("\\u{"));
+		Assert.assertEquals(-1,
+			CharSupport.getCharValueFromCharInGrammarLiteral("foo"));
+	}
+
+	@Test
+	public void testParseHexValue() {
+		Assert.assertEquals(-1, CharSupport.parseHexValue("foobar", -1, 3));
+		Assert.assertEquals(-1, CharSupport.parseHexValue("foobar", 1, -1));
+		Assert.assertEquals(-1, CharSupport.parseHexValue("foobar", 1, 3));
+		Assert.assertEquals(35, CharSupport.parseHexValue("123456", 1, 3));
+	}
+
+	@Test
+	public void testCapitalize() {
+		Assert.assertEquals("Foo", CharSupport.capitalize("foo"));
+	}
+
+	@Test
+	public void testGetIntervalSetEscapedString() {
+		Assert.assertEquals("",
+			CharSupport.getIntervalSetEscapedString(new IntervalSet()));
+		Assert.assertEquals("'\\u0000'",
+			CharSupport.getIntervalSetEscapedString(new IntervalSet(0)));
+		Assert.assertEquals("'\\u0001'..'\\u0003'",
+			CharSupport.getIntervalSetEscapedString(new IntervalSet(3, 1, 2)));
+	}
+
+	@Test
+	public void testGetRangeEscapedString() {
+		Assert.assertEquals("'\\u0002'..'\\u0004'",
+			CharSupport.getRangeEscapedString(2, 4));
+		Assert.assertEquals("'\\u0002'",
+			CharSupport.getRangeEscapedString(2, 2));
+	}
+}