TAP for ABAP

This project is bringing the famous testing library node-tap to ABAP.

Stop writing long cl_abap_unit_assert statements. Use short tap methods that you can chain as well!

The project supports creating and testing of snapshots as well.

NO WARRANTIES, MIT License

Important

This project is still experimental. All features described below are implemented. There are some test classes to validate the core features but it's missing full test coverage. Any help to implement more tests is much appreciated.

Usage

Here's how you use tap in your test classes:

METHOD setup.
  tap = NEW zcl_tap( ).
ENDMETHOD.

METHOD test.
  DATA(i) = 42.
  tap->act( i )->equal( 42 ).
ENDMETHOD.

For convenience, several methods are available with shorter names compared to the TAP original. For example, you could shorten the above assertion to t->_( i )->eq( 42 ).

Actual

You set the actual value using act( ) or short _( ). At this time, the values of sy-subrc, sy-index, sy-tabix, and sy-fdpos will be recorded as well.

Assertions (Expected)

The following list include the available assertion methods:

Method	Description
abort	cl_abap_unit_assert=>abort
initial	cl_abap_unit_assert=>assert_initial
not_initial	cl_abap_unit_assert=>assert_not_initial
bound	cl_abap_unit_assert=>assert_bound
not_bound	cl_abap_unit_assert=>assert_not_bound
true or ok	cl_abap_unit_assert=>assert_true
false or not_ok	cl_abap_unit_assert=>assert_false
equals or eq	cl_abap_unit_assert=>assert_equals
equals_float or eq_f	cl_abap_unit_assert=>assert_equals_float
differs or ne	cl_abap_unit_assert=>assert_differs (different types passes the test!)
cp	cl_abap_unit_assert=>assert_char_cp
np	cl_abap_unit_assert=>assert_char_np
cs	cl_abap_unit_assert=>assert_true( xsdbool( act CS exp ) )
ns	cl_abap_unit_assert=>assert_true( xsdbool( act NS exp ) )
contains	cl_abap_unit_assert=>assert_table_contains
not_contains	cl_abap_unit_assert=>assert_table_not_contains
error	IF act IS INSTANCE OF cx_root. cl_abap_unit_assert=>fail( ). ENDIF.
matches or re	cl_abap_unit_assert=>assert_text_matches (regex)
return_code or rc	cl_abap_unit_assert=>assert_return_code
subrc	cl_abap_unit_assert=>assert_subrc (default 0)
index	cl_abap_unit_assert=>assert_equals( act = sy-index )
tadex	cl_abap_unit_assert=>assert_equals( act = sy-tabix )
fdpos	cl_abap_unit_assert=>assert_equals( act = sy-fdpos )
throws	cl_abap_unit_assert=>fail
does_not_throw	If we get here, there was no exception. Therefore, pass the test
type	Returns the internal ABAP type of act (cl_abap_typedescr=>typekind_...)
kind	Returns the internal ABAP type category of act (cl_abap_typedescr=>kind_...)

You can chain tests as well:

READ TABLE itab INTO str.
tap->act( str )->subrc( 0 )->tabix( 2 )->eq( 'hasso' ).

TAP Protocol

You can process test and record test results like TAP Protocol:

METHOD setup.
  DATA(tap) = NEW zcl_tap( logging  = abap_true ).
ENDMETHOD.

METHOD test.
  tap->plan( 1 ).

  " your tests ...

  testplan = tap->end( ).  " TAP protocol output
ENDMETHOD.

Additional methods: bailout, passing, comment, pass, fail, skip, todo.

Snapshots

To record snapshots, set snapshot to abap_true:

DATA(tap) = NEW zcl_tap( snapshot = abap_true ).

In your test methods, you create snapshots as follows:

tap->snap_begin( 'SNAPSHOT_TEST' ).

DO 10 TIMES.
  tap->snap_write( |{ sy-index }| ).
ENDDO.

tap->snap_end( 'SNAPSHOT_TEST' ).

You can create multiple snapshots by providing a unique ID for each.

Subtests are created using tap->test_begin( ) and tap->test_end( ).

By default, the snapshots are stored in the "macro" include of the class.

* TAP_SNAPSHOT
*
* IMPORTANT
* This snapshot file is auto-generated, but designed for humans.
* It should be checked into source control and tracked carefully.
* Re-generate by setting SNAPSHOT = ABAP_TRUE and running tests.
* Make sure to inspect the output below.  Do not ignore changes!
*

* TAP_SNAPSHOT: BEGIN OF SNAPSHOT_TEST
* 1
* 2
* 3
* 4
* 5
* 6
* 7
* 8
* 9
* 10
* TAP_SNAPSHOT: END OF SNAPSHOT_TEST

To match snapshots, set snapshot to abap_false (which is the default):

DATA(tap) = NEW zcl_tap( snapshot = abap_false ).

If a test does not match the snapshot, an exception will be raised failing the test.

Alternatively, you can use a custom include for storing the snapshots:

DATA(tap) = NEW zcl_tap(
  snapshot     = abap_true
  snap_include = 'ZSNAP_INCLUDE'
  snap_package = 'ZPROJECT'
  snap_title   = 'Snapshots for Project' ).

Testing Float Numbers

You can set the default tolerance for comparison of floats (type f) in the constructor:

DATA(tap) = NEW zcl_tap( tolerance = '1.E-14' ).

Prerequisites

SAP Basis 7.50 or higher

Installation

Install tap as a global module in your system using apm.

or

Specify the tap module as a dependency in your project and import it to your namespace using apm.

Contributions

All contributions are welcome! Read our Contribution Guidelines, fork this repo, and create a pull request.

You can install the developer version of ABAP TAP using abapGit by creating a new online repository for https://github.com/abapPM/ABAP-Tap.

Recommended SAP package: $TAP

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