tests: add first test definitions for JavaPP parsing

Author: AlexanderSchultheiss

src/test/java/JPPParserTest.java

@@ -0,0 +1,86 @@
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+import org.variantsync.diffdetective.error.UnparseableFormulaException;
+
+import java.util.List;
+
+// Test cases for a parser of https://www.slashdev.ca/javapp/
+public class JPPParserTest {
+    private record TestCase(String formula, String expected) {
+    }
+
+    private record ThrowingTestCase(String formula) {
+    }
+
+    private static List<JPPParserTest.TestCase> testCases() {
+        return List.of(
+                /// #if expression
+                // expression := <operand> <operator> <operand> | [!]defined(name)
+                // expression := operand == operand
+                new JPPParserTest.TestCase("//#if 1 == -42", "1__EQ____U_MINUS__42"),
+                // expression := operand != operand
+                new JPPParserTest.TestCase("// #if 1 != 0", "1__NEQ__0"),
+                // expression := operand <= operand
+                new JPPParserTest.TestCase("//#if -1 <= 0", "__U_MINUS__1__LEQ__0"),
+                // expression := operand < operand
+                new JPPParserTest.TestCase("//#if \"str\" < 0", "__QUOTE__str__QUOTE____LT__0"),
+                // expression := operand >= operand
+                new JPPParserTest.TestCase("//   #if \"str\" >= \"str\"", "__QUOTE__str__QUOTE____GEQ____QUOTE__str__QUOTE__"),
+                // expression := operand > operand
+                new JPPParserTest.TestCase("//  #if 1.2 > 0", "1__DOT__2__GT__0"),
+                // expression := defined(name)
+                new JPPParserTest.TestCase("//#if defined(property)", "DEFINED_property"),
+                // expression := !defined(name)
+                new JPPParserTest.TestCase("//#if !defined(property)", "__U_NOT__DEFINED_property"),
+                // operand := ${property}
+                new JPPParserTest.TestCase("//#if ${os_version} == 4.1", "os_version__EQ__4__DOT__1"),
+
+                /// #if expression and expression
+                new JPPParserTest.TestCase("//#if 1 > 2 and defined( FEAT_A  )", "1__GT__2&&DEFINED_FEAT_A"),
+
+                /// #if expression or expression
+                new JPPParserTest.TestCase("//#if !defined(left) or defined(right)", "__U_NOT__DEFINED_left||DEFINED_right"),
+
+                /// #if expression and expression or expression
+                new JPPParserTest.TestCase("//#if ${os_version} == 4.1 and 1 > -42 or defined(ALL)", "os_version__EQ__4__DOT__1&&1__GT____U_MINUS__42||DEFINED_ALL")
+        );
+    }
+
+    private static List<JPPParserTest.ThrowingTestCase> throwingTestCases() {
+        return List.of(
+                // Invalid macro
+                new JPPParserTest.ThrowingTestCase(""),
+                new JPPParserTest.ThrowingTestCase("#"),
+                new JPPParserTest.ThrowingTestCase("ifdef A"),
+                new JPPParserTest.ThrowingTestCase("#error A"),
+                new JPPParserTest.ThrowingTestCase("#iferror A"),
+
+                // Empty formula
+                new JPPParserTest.ThrowingTestCase("//#if"),
+                new JPPParserTest.ThrowingTestCase("#if defined()"),
+                new JPPParserTest.ThrowingTestCase("#if ${} > 0"),
+
+                // incomplete expressions
+                new JPPParserTest.ThrowingTestCase("#if 1 >"),
+                new JPPParserTest.ThrowingTestCase("#if  == 2"),
+                new JPPParserTest.ThrowingTestCase("#if  ${version} > ")
+        );
+    }
+
+    @ParameterizedTest
+    @MethodSource("testCases")
+    public void testCase(JPPParserTest.TestCase testCase) throws UnparseableFormulaException {
+//        assertEquals(
+//                testCase.expected,
+//                // TODO:
+//        );
+    }
+
+    @ParameterizedTest
+    @MethodSource("throwingTestCases")
+    public void throwingTestCase(JPPParserTest.ThrowingTestCase testCase) {
+        //  assertThrows(UnparseableFormulaException.class, () -> //TODO
+        //  );
+    }
+
+}