xref: /llvm-project/lldb/test/API/commands/expression/error-limit/TestExprErrorLimit.py (revision 2238dcc39358353cac21df75c3c3286ab20b8f53) 
1"""
2Tests target.expr-error-limit.
3"""
4
5import lldb
6from lldbsuite.test.decorators import *
7from lldbsuite.test.lldbtest import *
8from lldbsuite.test import lldbutil
9
10
11class TestCase(TestBase):
12    @no_debug_info_test
13    def test(self):
14        # FIXME: The only reason this test needs to create a real target is because
15        # the settings of the dummy target can't be changed with `settings set`.
16        self.build()
17        target = self.createTestTarget()
18
19        # Our test expression that is just several lines of malformed
20        # integer literals (with a 'yerror' integer suffix). Every error
21        # has its own unique string (1, 2, 3, 4) and is on its own line
22        # that we can later find it when Clang prints the respective source
23        # code for each error to the error output.
24        # For example, in the error output below we would look for the
25        # unique `1yerror` string:
26        #     error: <expr>:1:2: invalid suffix 'yerror' on integer constant
27        #     1yerror
28        #     ^
29        expr = "1yerror;\n2yerror;\n3yerror;\n4yerror;"
30
31        options = lldb.SBExpressionOptions()
32        options.SetAutoApplyFixIts(False)
33
34        # Evaluate the expression and check that only the first 2 errors are
35        # emitted.
36        self.runCmd("settings set target.expr-error-limit 2")
37        eval_result = target.EvaluateExpression(expr, options)
38        self.assertIn("1yerror", str(eval_result.GetError()))
39        self.assertIn("2yerror", str(eval_result.GetError()))
40        self.assertNotIn("3yerror", str(eval_result.GetError()))
41        self.assertNotIn("4yerror", str(eval_result.GetError()))
42
43        # Change to a 3 errors and check again which errors are emitted.
44        self.runCmd("settings set target.expr-error-limit 3")
45        eval_result = target.EvaluateExpression(expr, options)
46        self.assertIn("1yerror", str(eval_result.GetError()))
47        self.assertIn("2yerror", str(eval_result.GetError()))
48        self.assertIn("3yerror", str(eval_result.GetError()))
49        self.assertNotIn("4yerror", str(eval_result.GetError()))
50
51        # Disable the error limit and make sure all errors are emitted.
52        self.runCmd("settings set target.expr-error-limit 0")
53        eval_result = target.EvaluateExpression(expr, options)
54        self.assertIn("1yerror", str(eval_result.GetError()))
55        self.assertIn("2yerror", str(eval_result.GetError()))
56        self.assertIn("3yerror", str(eval_result.GetError()))
57        self.assertIn("4yerror", str(eval_result.GetError()))
58