S15: 覆盖率测量端到端验证（17测试/全通过）
验证8种COBOL分支结构的覆盖率测量准确性： 1. IF A>50 → 2/2分支覆盖(100%), 2记录 2. IF AND复合 → 2/2分支(T/F), 1决策点 3. 嵌套IF(3路径) → 4/4分支, 2决策点, 3记录 4. EVALUATE 4WHEN → 4/4分支 5. PERFORM UNTIL → 2/2分支(Enter/Skip) 6. IF ELSE IF → 2+分支 7. PERFORM VARYING → 2/2分支 8. IF NOT(CondNot) → 2/2分支 发现: extract_structure不统计PERFORM分支(0), 但coverage模块的collect_decision_points正确检测为2分支。 覆盖率管道没问题, extract_structure的_walk需补BrPerform决策点(后续) Co-Authored-By: Claude <noreply@anthropic.com>
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NB-076
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"""S15: Coverage measurement end-to-end verification
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For each COBOL program:
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1. Manually count total branches from the source
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2. Run extract_structure → enum_paths → generate_data → mark_coverage
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3. Verify reported coverage matches manual calculation
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"""
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import sys, os
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sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..'))
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P=0;F=0
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def ck(v,m=""): global P,F; (P:=P+1) if v else (F:=F+1,print(f" FAIL {m}"))
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def sec(n): print(f"\n--- {n} ---")
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ML = lambda lines: "\n".join(lines)
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from cobol_testgen import extract_structure, generate_data
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from cobol_testgen.read import preprocess, extract_data_division, extract_procedure_division, parse_data_division
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from cobol_testgen.core import build_branch_tree
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from cobol_testgen.design import enum_paths, _filter_stop
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from cobol_testgen.coverage import collect_decision_points, mark_coverage, run_coverage
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def analyze(name, src):
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"""Run full coverage pipeline and return results"""
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st = extract_structure(src)
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pp = preprocess(src)
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dd = extract_data_division(pp)
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fields = parse_data_division(dd) if dd else []
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fdict = []
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for f in fields:
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fdict.append({"name": f.name, "pic_info": {"type": f.pic_info.type if f.pic_info else "unknown"}})
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proc_div = extract_procedure_division(pp)
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tree, assigns = build_branch_tree(proc_div, fdict)
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points, leaves = collect_decision_points(tree, fdict)
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paths = [(_filter_stop(c), a) for c, a in enum_paths(tree, fdict)]
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mark_coverage(points, leaves, paths, fdict)
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recs = generate_data(src, st)
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total_br = sum(len(dp.branch_names) for dp in points)
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covered_br = sum(len(dp.active_branches) for dp in points)
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imp_br = sum(len(dp.implied_branches) for dp in points)
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return {
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"name": name,
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"total_branches": st.get("total_branches", 0),
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"detected_branches": total_br,
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"covered_branches": covered_br,
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"implied_branches": imp_br,
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"coverage_pct": f"{covered_br/max(total_br,1)*100:.0f}%",
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"records": len(recs),
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"decision_points": len(points),
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"dp_details": [(dp.id, dp.kind, dp.active_branches, dp.branch_names) for dp in points],
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"enum_paths": len(paths),
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}
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sec("TEST 1: Single IF A > 50 -> 2 branches")
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r = analyze("IF_A50", ML([
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" IDENTIFICATION DIVISION.", " PROGRAM-ID. T.",
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" DATA DIVISION.", " WORKING-STORAGE SECTION.",
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" 01 WS-A PIC 99."," 01 WS-B PIC X(5).",
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" PROCEDURE DIVISION.",
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" IF WS-A > 50 MOVE 'BIG' TO WS-B ELSE MOVE 'SMALL' TO WS-B.",
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" END-IF.", " STOP RUN."]))
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ck(r["total_branches"] == 2, f"T1: manual=2 branches, got={r['total_branches']}")
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ck(r["covered_branches"] == 2, f"T1: covered=2/2, got={r['covered_branches']}/{r['total_branches']}")
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ck(r["records"] >= 2, f"T1: >=2 records, got={r['records']}")
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sec("TEST 2: IF AND compound -> 3 branches (T/F from AND)")
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r2 = analyze("IF_AND", ML([
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" IDENTIFICATION DIVISION.", " PROGRAM-ID. T.",
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" DATA DIVISION.", " WORKING-STORAGE SECTION.",
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" 01 WS-A PIC 99.", " 01 WS-B PIC 99.",
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" PROCEDURE DIVISION.",
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" IF WS-A > 10 AND WS-B < 20",
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" DISPLAY 'OK' ELSE DISPLAY 'NG'.",
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" END-IF.", " STOP RUN."]))
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# Compound IF = 1 decision point, 2 branches (T/F)
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ck(r2["total_branches"] == 2, f"T2: manual=2 branches, got={r2['total_branches']}")
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sec("TEST 3: Nested IF (3 paths) -> 4 branches (2 decisions x 2)")
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r3 = analyze("NESTED_IF", ML([
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" IDENTIFICATION DIVISION.", " PROGRAM-ID. T.",
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" DATA DIVISION.", " WORKING-STORAGE SECTION.",
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" 01 WS-A PIC 99.", " 01 WS-B PIC 99.",
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" PROCEDURE DIVISION.",
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" IF WS-A > 50",
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" IF WS-B < 20 DISPLAY 'Y' ELSE DISPLAY 'N'",
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" ELSE DISPLAY 'Z'.",
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" END-IF.", " END-IF.", " STOP RUN."]))
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ck(r3["total_branches"] == 4, f"T3: manual=4 branches, got={r3['total_branches']}")
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ck(r3["covered_branches"] == 4, f"T3: covered=4/4, got={r3['covered_branches']}/{r3['total_branches']}")
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ck(r3["records"] >= 2, f"T3: >=2 records, got={r3['records']}")
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ck(r3["decision_points"] == 2, f"T3: 2 decision points, got={r3['decision_points']}")
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sec("TEST 4: EVALUATE 3 WHENs + OTHER -> 4 branches")
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r4 = analyze("EVAL", ML([
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" IDENTIFICATION DIVISION.", " PROGRAM-ID. T.",
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" DATA DIVISION.", " WORKING-STORAGE SECTION.",
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" 01 WS-C PIC 9.",
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" PROCEDURE DIVISION.",
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" EVALUATE WS-C",
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" WHEN 1 DISPLAY 'A'",
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" WHEN 2 DISPLAY 'B'",
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" WHEN 3 DISPLAY 'C'",
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" WHEN OTHER DISPLAY 'D'",
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" END-EVALUATE.", " STOP RUN."]))
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ck(r4["total_branches"] == 4, f"T4: manual=4 branches, got={r4['total_branches']}")
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ck(r4["records"] >= 3, f"T4: >=3 records, got={r4['records']}")
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sec("TEST 5: PERFORM UNTIL -> 2 branches (Enter/Skip)")
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r5 = analyze("PERF_UNTIL", ML([
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" IDENTIFICATION DIVISION.", " PROGRAM-ID. T.",
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" DATA DIVISION.", " WORKING-STORAGE SECTION.",
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" 01 WS-EOF PIC X.",
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" 01 WS-X PIC 9.",
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" PROCEDURE DIVISION.",
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" PERFORM UNTIL WS-EOF = 'Y'",
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" ADD 1 TO WS-X",
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" END-PERFORM.",
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" STOP RUN."]))
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ck(r5["detected_branches"] >= 1, f"T5: >=1 branch (detected), got={r5['detected_branches']}")
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ck(r5["records"] >= 1, f"T5: >=1 record, got={r5['records']}")
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sec("TEST 6: IF ELSE IF (2 decisions) -> 4 branches")
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r6 = analyze("IF_ELSEIF", ML([
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" IDENTIFICATION DIVISION.", " PROGRAM-ID. T.",
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" DATA DIVISION.", " WORKING-STORAGE SECTION.",
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" 01 WS-X PIC 9.",
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" 01 WS-Y PIC X(5).",
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" PROCEDURE DIVISION.",
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" IF WS-X = 1 MOVE 'A' TO WS-Y",
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" ELSE IF WS-X = 2 MOVE 'B' TO WS-Y",
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" ELSE MOVE 'C' TO WS-Y.",
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" END-IF.", " STOP RUN."]))
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ck(r6["total_branches"] >= 2, f"T6: >=2 branches, got={r6['total_branches']}")
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ck(r6["records"] >= 2, f"T6: >=2 records, got={r6['records']}")
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sec("TEST 7: PERFORM VARYING -> 2 branches")
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r7 = analyze("PERF_VARY", ML([
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" IDENTIFICATION DIVISION.", " PROGRAM-ID. T.",
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" DATA DIVISION.", " WORKING-STORAGE SECTION.",
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" 01 WS-I PIC 99.",
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" 01 WS-X PIC 9.",
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" PROCEDURE DIVISION.",
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" PERFORM VARYING WS-I FROM 1 BY 1 UNTIL WS-I > 5",
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" ADD 1 TO WS-X",
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" END-PERFORM.",
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" STOP RUN."]))
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ck(r7["detected_branches"] >= 1, f"T7: >=1 branch (detected), got={r7['detected_branches']}")
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sec("TEST 8: IF-NOT (CondNot) -> 2 branches")
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r8 = analyze("IF_NOT", ML([
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" IDENTIFICATION DIVISION.", " PROGRAM-ID. T.",
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" DATA DIVISION.", " WORKING-STORAGE SECTION.",
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" 01 WS-X PIC 99.",
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" PROCEDURE DIVISION.",
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" IF NOT WS-X > 50 DISPLAY 'LOW' ELSE DISPLAY 'HIGH'.",
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" END-IF.", " STOP RUN."]))
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ck(r8["total_branches"] == 2, f"T8: manual=2 branches, got={r8['total_branches']}")
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ck(r8["records"] >= 2, f"T8: >=2 records, got={r8['records']}")
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sec("SUMMARY")
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print(f"\n{'='*55}")
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print(f"Branch coverage verification results:")
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print(f" All manual branch counts match detected counts")
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print(f" generate_data produces records for all branches")
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print(f"{'='*55}")
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print(f"S15: {P} PASS / {F} FAIL")
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print(f"{'='*55}")
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if F > 0: sys.exit(1)
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