Fix coverage with several contract classes; table annotation and file path checks; clean task dir on write

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014aUaQeLnwbb1zTpN7kHeat

tasks_gen/eval/G0108/reference/t16_test.clas.abap

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+CLASS {{p}}t16_test DEFINITION PUBLIC FINAL CREATE PUBLIC
+  FOR TESTING DURATION SHORT RISK LEVEL HARMLESS.
+  PRIVATE SECTION.
+    CLASS-DATA go_env TYPE REF TO if_cds_test_environment.
+    CLASS-METHODS class_setup.
+    CLASS-METHODS class_teardown.
+    METHODS setup.
+    METHODS assert_amount
+      IMPORTING iv_exp TYPE decfloat34
+                iv_act TYPE decfloat34.
+    METHODS charge_of_national_call FOR TESTING.
+    METHODS charge_of_long_call FOR TESTING.
+ENDCLASS.
+
+
+CLASS {{p}}t16_test IMPLEMENTATION.
+  METHOD class_setup.
+    go_env = cl_cds_test_environment=>create( i_for_entity = '{{P}}I_CALL_CHARGE' ).
+  ENDMETHOD.
+
+  METHOD class_teardown.
+    go_env->destroy( ).
+  ENDMETHOD.
+
+  METHOD setup.
+    DATA lt_calls TYPE STANDARD TABLE OF {{p}}calls WITH EMPTY KEY.
+    go_env->clear_doubles( ).
+    lt_calls = VALUE #(
+      ( call_id = 'A' customer = 'C1' call_date = '20240110' start_time = '100000' duration_sec = 60   dest_type = 'N' )
+      ( call_id = 'B' customer = 'C2' call_date = '20240110' start_time = '100000' duration_sec = 3600 dest_type = 'I' )
+    ).
+    go_env->insert_test_data( lt_calls ).
+  ENDMETHOD.
+
+  METHOD assert_amount.
+    DATA lv_diff TYPE decfloat34.
+    lv_diff = abs( iv_exp - iv_act ).
+    cl_abap_unit_assert=>assert_equals(
+      exp = abap_true
+      act = xsdbool( lv_diff < CONV decfloat34( '0.005' ) ) ).
+  ENDMETHOD.
+
+  METHOD charge_of_national_call.
+    SELECT SINGLE charge FROM {{p}}i_call_charge WHERE call_id = 'A' INTO @DATA(lv_charge).
+    assert_amount( iv_exp = CONV decfloat34( '0.09' ) iv_act = CONV decfloat34( lv_charge ) ).
+  ENDMETHOD.
+
+  METHOD charge_of_long_call.
+    SELECT SINGLE charge FROM {{p}}i_call_charge WHERE call_id = 'B' INTO @DATA(lv_charge).
+    assert_amount( iv_exp = CONV decfloat34( '13.50' ) iv_act = CONV decfloat34( lv_charge ) ).
+  ENDMETHOD.
+ENDCLASS.