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Max_Line_Length); procedure Error (Msg : String) is begin null; end Error; 4ZZ"  procedure Get_Line is begin null; end Get_Line; procedure Get_End is begin if Line (1 .. 4) = ".end" then Get_Line; else Error ("Missing .END, assume here."); end if; end Get_End; end Io; PZ?   TSE_Tools.tcl  (5Regression TestingAll test cases are self-checking A batch file is used to run the test files through the TSE testing process A batch log file is used to check for failures Failed tests are examined and justified or updated$Benefits of TSETests can be developed by engineers who are not necessarily expert programmers in Ada TSE includes a tool to analyze the source code and identify inputs and outputs of a given module Provides coverage information$Benefits of TSE (cont.)TSE tests are easy to maintain due to uniformity of test definition files TSE tests are repeatable with no manual interaction necessary TSE tests can be executed on host or target platform using different support packages $Productivity Improvements{Based on our experience we have seen a range of 1:5 to 1:10 productivity advantage. Depends on the complexity of the module,T$(T(0Estimate of TSE Based Testing*We have developed a tool that estimates the number of hours needed to test a module with TSE Based on Statement count, number of If s, Case s, Loop s, Exit s, Logical operators, short circuit control forms, and stub calls The Get_End procedure estimated testing time is 7 hours$Z1Estimate of Manual Testing Estimated size of the get_end test driver is 90 SLOC Including main driver and stubs Programmer productivity for the test code development is 2 SLOC per hour (Hihm) This yields the productivity improvement of 1:6.5 for get_end procedureD6( (6 Limitations of TSE/It is not possible to construct one generic module test to verify all instantiations Handled on an instantiation by instantiation basis Tasking is difficult to test because tasks run in independent parallel threads Each subprogram can be tested independently regardless of the number of tasks sharing it\U,3O,YU3OYLimitations of TSE (cont.)PFor modules using private type parameters or returning private type, construction of external test driver is awkward Embed the test driver in the body of the package that defines the limited private type Nested subprogram testing not available Requires the test driver to be nested Must be tested in the context of enclosing subprogramdu,W(,]uW(]Summary of TSE BenefitsMinimizes the need for programming knowledge Cuts testing effort several fold over manual approach Minimizes cost of retesting Allows us to meet FAA/DO-178B requirements in cost effective manner$/&'),-./ 2 3 4   ` f3f3` ff̙` ___` ff` 3ff3f>?" dd@,?lPd@   Z l<@ d`"  n?" dd@   @@``@n?" dd@  @@``PR    @ ` ` p>>  (  ^N y   "yZ  S B7 C DEHFPv @?q 6 6 n(dx  G b q %(@"B y2   `G1?"  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H  0޽h ? ̙33 0   >(   X   C       S M @   @,The same tests can be run on either platformH   0޽h ? ̙33 0 0,(  0X 0 C     0 S | @   .Html view of MCDC coverageH 0 0޽h ? ̙33 0 DR(  DX D C     D S ģ @   T@Structural coverage: source code should be exercised completely H D 0޽h ? ̙33& 0 Hv(  HX H C     H S ʣ @   xdMCDC: each condition can be toggled to vary the outcome while holding all other conditions constant H H 0޽h ? ̙33 0 E=L(  LX L C    = L S L @   Commercial off the shelf AdaTest are limited to a specific application domain or they require the tester to code the test cases in the form of a test driver function in some programming language.H L 0޽h ? ̙33; 0 P(  PX P C     P S  @   yThere is a TCLTk smartdiff tool used to diff the test log files generated from the old and new version of the source codeH P 0޽h ? ̙33V 0 @X(  XX X C     X S  @   hThe numerical score is the weighted sum of sc + ic + 2*cc + 4*lc + xc + Logc + Scc + Stc*5 = composite $i,< H X 0޽h ? ̙33 0 P`(  `X ` C     ` S  @   Frequently used rule of thumb, 90 SLOC Hihm, J., Habib-aghai, H. Cost estimation of software intensive projects: A survey of current practices. 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