Normal I created a standalone schema that is functionally identical to the embedded schema used in the existing general unparsing test cases (daffodil-test/src/test/resources/edu/illinois/ncsa/daffodil/section00/general/testUnparserGeneral.tdml), and test unparseFixedLengthString03 that is the same as unparseFixedLengthString01, except that it references the external schema rather than the embedded one.
The test fails with the following error:
[error] Test edu.illinois.ncsa.daffodil.section00.general.TestUnparserGeneral.test_unparseFixedLengthString03 failed: edu.illinois.ncsa.daffodil.tdml.TDMLException: output data length 0 for List() doesn't match expected value 5 for List(72, 101, 108, 108, 111)
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[error] at edu.illinois.ncsa.daffodil.tdml.UnparserTestCase.verifyData(TDMLRunner.scala:785)
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[error] at edu.illinois.ncsa.daffodil.tdml.UnparserTestCase.runUnparserExpectSuccess(TDMLRunner.scala:819)
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[error] at edu.illinois.ncsa.daffodil.tdml.UnparserTestCase.runProcessor(TDMLRunner.scala:759)
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[error] at edu.illinois.ncsa.daffodil.tdml.TestCase.run(TDMLRunner.scala:506)
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[error] at edu.illinois.ncsa.daffodil.tdml.DFDLTestSuite.runOneTestWithDataVolumes(TDMLRunner.scala:288)
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[error] at edu.illinois.ncsa.daffodil.tdml.DFDLTestSuite.runOneTest(TDMLRunner.scala:279)
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[error] at edu.illinois.ncsa.daffodil.section00.general.TestUnparserGeneral.test_unparseFixedLengthString03(TestUnparserGeneral.scala:56)
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[error] ...
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I temporarily wrote up a parserTestCase using the same schema, swapping the input and output, and the test ran without issues.
See test unparseFixedLengthString03 in the following files:
daffodil-test/src/test/scala-debug/edu/illinois/ncsa/daffodil/section00/TestUnparserGeneralDebug.scala
daffodil-test/src/test/resources/edu/illinois/ncsa/daffodil/section00/general/generalSchema.dfdl.xsd
daffodil-test/src/test/resources/edu/illinois/ncsa/daffodil/section00/general/testUnparserGeneral.tdml
