Identifiers.java

package com.rox.cpu.mos6502.assembler;

/** Shared identifier-name validation for labels, used by both label parsing and operand parsing. */

final class Identifiers {

    private Identifiers() {

    }

    static boolean isValidLabelName(final String text) {

        if (text.isEmpty() || !(Character.isLetter(text.charAt(0)) || text.charAt(0) == '_')) {

            return false;

        }

        for (int i = 1; i < text.length(); i++) {

            final char c = text.charAt(i);

            if (!Character.isLetterOrDigit(c) && c != '_') {

                return false;

            }

        }

        return true;

    }

}

Active mutators

• CONDITIONALS_BOUNDARY
• EMPTY_RETURNS
• FALSE_RETURNS
• INCREMENTS
• INVERT_NEGS
• MATH
• NEGATE_CONDITIONALS
• NULL_RETURNS
• PRIMITIVE_RETURNS
• TRUE_RETURNS
• VOID_METHOD_CALLS

Tests examined

• com.rox.cpu.mos6502.assembler.LineScannerTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.LineScannerTest]/[nested-class:LabelLines]/[method:emptyTextBeforeAColonIsNotTreatedAsALabel()] (0 ms)
• com.rox.cpu.mos6502.assembler.OperandParserTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.OperandParserTest]/[nested-class:MalformedSyntax]/[method:exceptionMessageIsAttributedToTheSourceLineNumber()] (0 ms)
• com.rox.cpu.mos6502.assembler.OperandParserTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.OperandParserTest]/[nested-class:MalformedSyntax]/[method:punctuationThatIsNeitherALiteralNorAnIdentifierIsRejected()] (0 ms)
• com.rox.cpu.mos6502.assembler.OperandParserTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.OperandParserTest]/[nested-class:LabelReferences]/[test-template:bareIdentifiersAreLabelReferences(java.lang.String)]/[test-template-invocation:#3] (0 ms)
• com.rox.cpu.mos6502.assembler.OperandParserTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.OperandParserTest]/[nested-class:LabelReferences]/[test-template:bareIdentifiersAreLabelReferences(java.lang.String)]/[test-template-invocation:#4] (0 ms)
• com.rox.cpu.mos6502.assembler.OperandParserTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.OperandParserTest]/[nested-class:LabelReferences]/[test-template:bareIdentifiersAreLabelReferences(java.lang.String)]/[test-template-invocation:#1] (0 ms)
• com.rox.cpu.mos6502.assembler.OperandParserTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.OperandParserTest]/[nested-class:LabelReferences]/[test-template:bareIdentifiersAreLabelReferences(java.lang.String)]/[test-template-invocation:#2] (0 ms)
• com.rox.cpu.mos6502.assembler.LineScannerTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.LineScannerTest]/[nested-class:LabelLines]/[method:labelOnlyLineHasNoMnemonic()] (0 ms)
• com.rox.cpu.mos6502.assembler.LineScannerTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.LineScannerTest]/[nested-class:LabelLines]/[method:anInvalidCharacterAfterTheStartOfACandidateLabelPreventsItBeingRecognisedAsALabel()] (0 ms)
• com.rox.cpu.mos6502.assembler.OperandParserTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.OperandParserTest]/[nested-class:LabelReferences]/[method:labelIsUnresolvedUntilInstructionResolverDecidesRelativeOrAbsolute()] (0 ms)
• com.rox.cpu.mos6502.assembler.LineScannerTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.LineScannerTest]/[method:scansTheFullSampleProgramIntoTheExpectedSequenceOfLines()] (0 ms)
• com.rox.cpu.mos6502.assembler.LineScannerTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.LineScannerTest]/[nested-class:LabelLines]/[method:labelOnlyLineFollowedByLabelAndInstructionLine()] (1 ms)
• com.rox.cpu.mos6502.assembler.LineScannerTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.LineScannerTest]/[nested-class:LabelLines]/[method:labelAndInstructionOnTheSameLine()] (0 ms)
• com.rox.cpu.mos6502.assembler.AssemblerTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.AssemblerTest]/[method:duplicateLabelThrows()] (0 ms)
• com.rox.cpu.mos6502.assembler.AssemblerTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.AssemblerTest]/[method:undefinedLabelReferenceThrows()] (0 ms)
• com.rox.cpu.mos6502.assembler.AssemblerTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.AssemblerTest]/[method:labelOnlyLineFollowedByLabelAndInstructionLineBothResolveToTheSameAddress()] (0 ms)
• com.rox.cpu.mos6502.assembler.AssemblerTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.AssemblerTest]/[method:aDefinedButUnreferencedLabelStillAppearsInTheSymbolTable()] (0 ms)
• com.rox.cpu.mos6502.assembler.AssemblerTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.AssemblerTest]/[method:forwardBranchResolvesCorrectly()] (0 ms)
• com.rox.cpu.mos6502.assembler.AssemblerTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.AssemblerTest]/[method:jmpToALabelEmitsALittleEndianAbsoluteAddress()] (0 ms)
• com.rox.cpu.mos6502.assembler.AssemblerTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.AssemblerTest]/[method:branchOffsetOfExactlyNegative128Succeeds()] (1 ms)
• com.rox.cpu.mos6502.assembler.AssemblerTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.AssemblerTest]/[method:branchOffsetOfNegative129FailsRangeCheck()] (2 ms)
• com.rox.cpu.mos6502.assembler.AssemblerTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.AssemblerTest]/[method:branchOffsetOfPositive128FailsRangeCheck()] (4 ms)
• com.rox.cpu.mos6502.assembler.AssemblerTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.AssemblerTest]/[method:branchOffsetOfExactlyPositive127Succeeds()] (3 ms)
• com.rox.cpu.mos6502.assembler.AssemblerTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.assembler.AssemblerTest]/[method:assembleAMoreRealisticSmallProgram()] (0 ms)
• com.rox.cpu.mos6502.MOS6502IntegrationTest.[engine:junit-jupiter]/[class:com.rox.cpu.mos6502.MOS6502IntegrationTest]/[method:simpleProgram()] (2 ms)
• com.rox.NESMemoryBusIntegrationTest.[engine:junit-jupiter]/[class:com.rox.NESMemoryBusIntegrationTest]/[method:simpleProgramRunsIdenticallyThroughNESMemoryBus()] (6 ms)