tests/stress: Improve qstr_limit test to run on minimal targets.

Changes here are:
- Split out string format module sub-test to a separate test file, so it
  can be skipped on targets that don't have str% capabilities.
- Print the whole type instead of `.__name__` to support targets that don't
  have `.__name__` enabled (this still tests the same thing).
- Print `RuntimeError` exception message to be sure the correct exception
  is being raised.

This test now runs on unix and zephyr minimal configurations.

Signed-off-by: Damien George <damien@micropython.org>

tests/stress/qstr_limit.py

@@ -12,8 +12,8 @@ for l in range(254, 259):
     var = make_id(l)
     try:
         exec(var + "=1", g)
-    except RuntimeError:
-        print("RuntimeError", l)
+    except RuntimeError as er:
+        print("RuntimeError", er, l)
         continue
     print(var in g)
 
@@ -26,16 +26,16 @@ def f(**k):
 for l in range(254, 259):
     try:
         exec("f({}=1)".format(make_id(l)))
-    except RuntimeError:
-        print("RuntimeError", l)
+    except RuntimeError as er:
+        print("RuntimeError", er, l)
 
 # type construction
 for l in range(254, 259):
     id = make_id(l)
     try:
-        print(type(id, (), {}).__name__)
-    except RuntimeError:
-        print("RuntimeError", l)
+        print(type(id, (), {}))
+    except RuntimeError as er:
+        print("RuntimeError", er, l)
 
 
 # hasattr, setattr, getattr
@@ -48,28 +48,20 @@ for l in range(254, 259):
     a = A()
     try:
         setattr(a, id, 123)
-    except RuntimeError:
-        print("RuntimeError", l)
+    except RuntimeError as er:
+        print("RuntimeError", er, l)
     try:
         print(hasattr(a, id), getattr(a, id))
-    except RuntimeError:
-        print("RuntimeError", l)
+    except RuntimeError as er:
+        print("RuntimeError", er, l)
 
 # format with keys
 for l in range(254, 259):
     id = make_id(l)
     try:
         print(("{" + id + "}").format(**{id: l}))
-    except RuntimeError:
-        print("RuntimeError", l)
-
-# modulo format with keys
-for l in range(254, 259):
-    id = make_id(l)
-    try:
-        print(("%(" + id + ")d") % {id: l})
-    except RuntimeError:
-        print("RuntimeError", l)
+    except RuntimeError as er:
+        print("RuntimeError", er, l)
 
 # import module
 # (different OS's have different results so only run those that are consistent)
@@ -78,8 +70,8 @@ for l in (100, 101, 256, 257, 258):
         __import__(make_id(l))
     except ImportError:
         print("ok", l)
-    except RuntimeError:
-        print("RuntimeError", l)
+    except RuntimeError as er:
+        print("RuntimeError", er, l)
 
 # import package
 for l in (100, 101, 102, 128, 129):
@@ -87,5 +79,5 @@ for l in (100, 101, 102, 128, 129):
         exec("import " + make_id(l) + "." + make_id(l, "A"))
     except ImportError:
         print("ok", l)
-    except RuntimeError:
-        print("RuntimeError", l)
+    except RuntimeError as er:
+        print("RuntimeError", er, l)

tests/stress/qstr_limit.py.exp

@@ -1,43 +1,38 @@
 True
 True
-RuntimeError 256
-RuntimeError 257
-RuntimeError 258
+RuntimeError name too long 256
+RuntimeError name too long 257
+RuntimeError name too long 258
 {'abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrst': 1}
 {'abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstu': 1}
-RuntimeError 256
-RuntimeError 257
-RuntimeError 258
-abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrst
-abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstu
-RuntimeError 256
-RuntimeError 257
-RuntimeError 258
+RuntimeError name too long 256
+RuntimeError name too long 257
+RuntimeError name too long 258
+<class 'abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrst'>
+<class 'abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstu'>
+RuntimeError name too long 256
+RuntimeError name too long 257
+RuntimeError name too long 258
 True 123
 True 123
-RuntimeError 256
-RuntimeError 256
-RuntimeError 257
-RuntimeError 257
-RuntimeError 258
-RuntimeError 258
+RuntimeError name too long 256
+RuntimeError name too long 256
+RuntimeError name too long 257
+RuntimeError name too long 257
+RuntimeError name too long 258
+RuntimeError name too long 258
 254
 255
-RuntimeError 256
-RuntimeError 257
-RuntimeError 258
-254
-255
-RuntimeError 256
-RuntimeError 257
-RuntimeError 258
+RuntimeError name too long 256
+RuntimeError name too long 257
+RuntimeError name too long 258
 ok 100
 ok 101
-RuntimeError 256
-RuntimeError 257
-RuntimeError 258
+RuntimeError name too long 256
+RuntimeError name too long 257
+RuntimeError name too long 258
 ok 100
 ok 101
 ok 102
-RuntimeError 128
-RuntimeError 129
+RuntimeError name too long 128
+RuntimeError name too long 129

tests/stress/qstr_limit_str_modulo.py

@@ -0,0 +1,21 @@
+# Test interning qstrs that go over the qstr length limit (255 bytes in default configuration).
+# The tests here are specifically for str formatting with %.
+
+try:
+    "" % ()
+except TypeError:
+    print("SKIP")
+    raise SystemExit
+
+
+def make_id(n, base="a"):
+    return "".join(chr(ord(base) + i % 26) for i in range(n))
+
+
+# modulo format with keys
+for l in range(254, 259):
+    id = make_id(l)
+    try:
+        print(("%(" + id + ")d") % {id: l})
+    except RuntimeError as er:
+        print("RuntimeError", er, l)

tests/stress/qstr_limit_str_modulo.py.exp

@@ -0,0 +1,5 @@
+254
+255
+RuntimeError name too long 256
+RuntimeError name too long 257
+RuntimeError name too long 258