Merge tag 'v1.9.1'2.0.0-alpha.0

Fixes for stmhal USB mass storage, lwIP bindings and VFS regressions

This release provides an important fix for the USB mass storage device in
the stmhal port by implementing the SCSI SYNCHRONIZE_CACHE command, which
is now require by some Operating Systems.  There are also fixes for the
lwIP bindings to improve non-blocking sockets and error codes.  The VFS has
some regressions fixed including the ability to statvfs the root.

All changes are listed below.

py core:
- modbuiltins: add core-provided version of input() function
- objstr: catch case of negative "maxsplit" arg to str.rsplit()
- persistentcode: allow to compile with complex numbers disabled
- objstr: allow to compile with obj-repr D, and unicode disabled
- modsys: allow to compile with obj-repr D and PY_ATTRTUPLE disabled
- provide mp_decode_uint_skip() to help reduce stack usage
- makeqstrdefs.py: make script run correctly with Python 2.6
- objstringio: if created from immutable object, follow copy on write policy

extmod:
- modlwip: connect: for non-blocking mode, return EINPROGRESS
- modlwip: fix error codes for duplicate calls to connect()
- modlwip: accept: fix error code for non-blocking mode
- vfs: allow to statvfs the root directory
- vfs: allow "buffering" and "encoding" args to VFS's open()
- modframebuf: fix signed/unsigned comparison pendantic warning

lib:
- libm: use isfinite instead of finitef, for C99 compatibility
- utils/interrupt_char: remove support for KBD_EXCEPTION disabled

tests:
- basics/string_rsplit: add tests for negative "maxsplit" argument
- float: convert "sys.exit()" to "raise SystemExit"
- float/builtin_float_minmax: PEP8 fixes
- basics: convert "sys.exit()" to "raise SystemExit"
- convert remaining "sys.exit()" to "raise SystemExit"

unix port:
- convert to use core-provided version of built-in import()
- Makefile: replace references to make with $(MAKE)

windows port:
- convert to use core-provided version of built-in import()

qemu-arm port:
- Makefile: adjust object-file lists to get correct dependencies
- enable micropython.mem_*() functions to allow more tests

stmhal port:
- boards: enable DAC for NUCLEO_F767ZI board
- add support for NUCLEO_F446RE board
- pass USB handler as parameter to allow more than one USB handler
- usb: use local USB handler variable in Start-of-Frame handler
- usb: make state for USB device private to top-level USB driver
- usbdev: for MSC implement SCSI SYNCHRONIZE_CACHE command
- convert from using stmhal's input() to core provided version

cc3200 port:
- convert from using stmhal's input() to core provided version

teensy port:
- convert from using stmhal's input() to core provided version

esp8266 port:
- Makefile: replace references to make with $(MAKE)
- Makefile: add clean-modules target
- convert from using stmhal's input() to core provided version

zephyr port:
- modusocket: getaddrinfo: Fix mp_obj_len() usage
- define MICROPY_PY_SYS_PLATFORM (to "zephyr")
- machine_pin: use native Zephyr types for Zephyr API calls

docs:
- machine.Pin: remove out_value() method
- machine.Pin: add on() and off() methods
- esp8266: consistently replace Pin.high/low methods with .on/off
- esp8266/quickref: polish Pin.on()/off() examples
- network: move confusingly-named cc3200 Server class to its reference
- uos: deconditionalize, remove minor port-specific details
- uos: move cc3200 port legacy VFS mounting functions to its ref doc
- machine: sort machine classes in logical order, not alphabetically
- network: first step to describe standard network class interface

examples:
- embedding: use core-provided KeyboardInterrupt object

46 files changed, 464 insertions, 0 deletions

diff --git a/tests/cpydiff/core_arguments.py b/tests/cpydiff/core_arguments.py
new file mode 100644
index 000000000..4734a8062
--- /dev/null
+++ b/tests/cpydiff/core_arguments.py
@@ -0,0 +1,10 @@
+"""
+categories: Core
+description: Error messages for methods may display unexpected argument counts
+cause: MicroPython counts "self" as an argument.
+workaround: Interpret error messages with the information above in mind.
+"""
+try:
+    [].append()
+except Exception as e:
+    print(e)
diff --git a/tests/cpydiff/core_class_delnotimpl.py b/tests/cpydiff/core_class_delnotimpl.py
new file mode 100644
index 000000000..c51c3d536
--- /dev/null
+++ b/tests/cpydiff/core_class_delnotimpl.py
@@ -0,0 +1,16 @@
+"""
+categories: Core,Classes
+description: Special method __del__ not implemented for user-defined classes
+cause: Unknown
+workaround: Unknown
+"""
+import gc
+
+class Foo():
+    def __del__(self):
+        print('__del__')
+
+f = Foo()
+del f
+
+gc.collect()
diff --git a/tests/cpydiff/core_class_supermultiple.py b/tests/cpydiff/core_class_supermultiple.py
new file mode 100644
index 000000000..adf4a17a8
--- /dev/null
+++ b/tests/cpydiff/core_class_supermultiple.py
@@ -0,0 +1,27 @@
+"""
+categories: Core,Classes
+description: When inheriting from multiple classes super() only calls one class
+cause: Depth first non-exhaustive method resolution order
+workaround: Unknown
+"""
+class A:
+    def __init__(self):
+        print("A.__init__")
+
+class B(A):
+    def __init__(self):
+        print("B.__init__")
+        super().__init__()
+
+class C(A):
+    def __init__(self):
+        print("C.__init__")
+        super().__init__()
+
+
+class D(B,C):
+    def __init__(self):
+        print("D.__init__")
+        super().__init__()
+
+D()
diff --git a/tests/cpydiff/core_class_superproperty.py b/tests/cpydiff/core_class_superproperty.py
new file mode 100644
index 000000000..1ec210550
--- /dev/null
+++ b/tests/cpydiff/core_class_superproperty.py
@@ -0,0 +1,18 @@
+"""
+categories: Core,Classes
+description: Calling super() getter property in subclass will return a property object, not the value
+cause: Unknown
+workaround: Unknown
+"""
+class A:
+    @property
+    def p(self):
+        return {"a":10}
+
+class AA(A):
+    @property
+    def p(self):
+        return super().p
+
+a = AA()
+print(a.p)
diff --git a/tests/cpydiff/core_function_unpacking.py b/tests/cpydiff/core_function_unpacking.py
new file mode 100644
index 000000000..01d25ee4d
--- /dev/null
+++ b/tests/cpydiff/core_function_unpacking.py
@@ -0,0 +1,7 @@
+"""
+categories: Core,Functions
+description: Unpacking function arguments in non-last position isn't detected as an error
+cause: Unknown
+workaround: The syntax below is invalid, never use it in applications.
+"""
+print(*(1, 2), 3)
diff --git a/tests/cpydiff/core_function_userattr.py b/tests/cpydiff/core_function_userattr.py
new file mode 100644
index 000000000..297293908
--- /dev/null
+++ b/tests/cpydiff/core_function_userattr.py
@@ -0,0 +1,11 @@
+"""
+categories: Core,Functions
+description: User-defined attributes for functions are not supported
+cause: MicroPython is highly optimized for memory usage.
+workaround: Use external dictionary, e.g. ``FUNC_X[f] = 0``.
+"""
+def f():
+    pass
+
+f.x = 0
+print(f.x)
diff --git a/tests/cpydiff/core_generator_noexit.py b/tests/cpydiff/core_generator_noexit.py
new file mode 100644
index 000000000..c25fbe75a
--- /dev/null
+++ b/tests/cpydiff/core_generator_noexit.py
@@ -0,0 +1,24 @@
+"""
+categories: Core,Generator
+description: Context manager __exit__() not called in a generator which does not run to completion
+cause: Unknown
+workaround: Unknown
+"""
+class foo(object):
+    def __enter__(self):
+        print('Enter')
+    def __exit__(self, *args):
+        print('Exit')
+
+def bar(x):
+    with foo():
+        while True:
+            x += 1
+            yield x
+
+def func():
+    g = bar(0)
+    for _ in range(3):
+        print(next(g))
+
+func()
diff --git a/tests/cpydiff/core_import_path.py b/tests/cpydiff/core_import_path.py
new file mode 100644
index 000000000..04fc4bd5b
--- /dev/null
+++ b/tests/cpydiff/core_import_path.py
@@ -0,0 +1,9 @@
+"""
+categories: Core,import
+description: __path__ attribute of a package has a different type (single string instead of list of strings) in MicroPython
+cause: MicroPython does't support namespace packages split across filesystem. Beyond that, MicroPython's import system is highly optimized for minimal memory usage.
+workaround: Details of import handling is inherently implementation dependent. Don't rely on such details in portable applications.
+"""
+import modules
+
+print(modules.__path__)
diff --git a/tests/cpydiff/core_import_prereg.py b/tests/cpydiff/core_import_prereg.py
new file mode 100644
index 000000000..4a7121782
--- /dev/null
+++ b/tests/cpydiff/core_import_prereg.py
@@ -0,0 +1,17 @@
+"""
+categories: Core,import
+description: Failed to load modules are still registered as loaded
+cause: To make module handling more efficient, it's not wrapped with exception handling.
+workaround: Test modules before production use; during development, use ``del sys.modules["name"]``, or just soft or hard reset the board.
+"""
+import sys
+
+try:
+    from modules import foo
+except NameError as e:
+    print(e)
+try:
+    from modules import foo
+    print('Should not get here')
+except NameError as e:
+    print(e)
diff --git a/tests/cpydiff/core_import_split_ns_pkgs.py b/tests/cpydiff/core_import_split_ns_pkgs.py
new file mode 100644
index 000000000..700620c47
--- /dev/null
+++ b/tests/cpydiff/core_import_split_ns_pkgs.py
@@ -0,0 +1,14 @@
+"""
+categories: Core,import
+description: MicroPython does't support namespace packages split across filesystem.
+cause: MicroPython's import system is highly optimized for simplicity, minimal memory usage, and minimal filesystem search overhead.
+workaround: Don't install modules belonging to the same namespace package in different directories. For MicroPython, it's recommended to have at most 3-component module search paths: for your current application, per-user (writable), system-wide (non-writable).
+"""
+import sys
+sys.path.append(sys.path[1] + "/modules")
+sys.path.append(sys.path[1] + "/modules2")
+
+import subpkg.foo
+import subpkg.bar
+
+print("Two modules of a split namespace package imported")
diff --git a/tests/cpydiff/core_mro.py b/tests/cpydiff/core_mro.py
new file mode 100644
index 000000000..35b898b30
--- /dev/null
+++ b/tests/cpydiff/core_mro.py
@@ -0,0 +1,15 @@
+"""
+categories: Core
+description: Method Resolution Order (MRO) is not compliant with CPython
+cause: Unknown
+workaround: Unknown
+"""
+class Foo:
+    def __str__(self):
+        return "Foo"
+
+class C(tuple, Foo):
+    pass
+
+t = C((1, 2, 3))
+print(t)
diff --git a/tests/cpydiff/modules/__init__.py b/tests/cpydiff/modules/__init__.py
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/tests/cpydiff/modules/__init__.py
diff --git a/tests/cpydiff/modules/foo.py b/tests/cpydiff/modules/foo.py
new file mode 100644
index 000000000..e6e33a7b4
--- /dev/null
+++ b/tests/cpydiff/modules/foo.py
@@ -0,0 +1,2 @@
+print('foo')
+xxx
diff --git a/tests/cpydiff/modules/subpkg/foo.py b/tests/cpydiff/modules/subpkg/foo.py
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/tests/cpydiff/modules/subpkg/foo.py
diff --git a/tests/cpydiff/modules2/subpkg/bar.py b/tests/cpydiff/modules2/subpkg/bar.py
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/tests/cpydiff/modules2/subpkg/bar.py
diff --git a/tests/cpydiff/modules_array_containment.py b/tests/cpydiff/modules_array_containment.py
new file mode 100644
index 000000000..190a3c276
--- /dev/null
+++ b/tests/cpydiff/modules_array_containment.py
@@ -0,0 +1,8 @@
+"""
+categories: Modules,array
+description: Looking for integer not implemented
+cause: Unknown
+workaround: Unknown
+"""
+import array
+print(1 in array.array('B', b'12'))
diff --git a/tests/cpydiff/modules_array_deletion.py b/tests/cpydiff/modules_array_deletion.py
new file mode 100644
index 000000000..97f988da2
--- /dev/null
+++ b/tests/cpydiff/modules_array_deletion.py
@@ -0,0 +1,10 @@
+"""
+categories: Modules,array
+description: Array deletion not implemented
+cause: Unknown
+workaround: Unknown
+"""
+import array
+a = array.array('b', (1, 2, 3))
+del a[1]
+print(a)
diff --git a/tests/cpydiff/modules_array_subscrstep.py b/tests/cpydiff/modules_array_subscrstep.py
new file mode 100644
index 000000000..1103f1826
--- /dev/null
+++ b/tests/cpydiff/modules_array_subscrstep.py
@@ -0,0 +1,9 @@
+"""
+categories: Modules,array
+description: Subscript with step != 1 is not yet implemented
+cause: Unknown
+workaround: Unknown
+"""
+import array
+a = array.array('b', (1, 2, 3))
+print(a[3:2:2])
diff --git a/tests/cpydiff/modules_deque.py b/tests/cpydiff/modules_deque.py
new file mode 100644
index 000000000..dc9369d02
--- /dev/null
+++ b/tests/cpydiff/modules_deque.py
@@ -0,0 +1,9 @@
+"""
+categories: Modules,deque
+description: Deque not implemented
+cause: Unknown
+workaround: Use regular queues or lists creatively
+"""
+import collections
+D = collections.deque()
+print(D)
diff --git a/tests/cpydiff/modules_json_nonserializable.py b/tests/cpydiff/modules_json_nonserializable.py
new file mode 100644
index 000000000..913b734e8
--- /dev/null
+++ b/tests/cpydiff/modules_json_nonserializable.py
@@ -0,0 +1,14 @@
+"""
+categories: Modules,json
+description: JSON module does not throw exception when object is not serialisable
+cause: Unknown
+workaround: Unknown
+"""
+import json
+a = bytes(x for x in range(256))
+try:
+    z = json.dumps(a)
+    x = json.loads(z)
+    print('Should not get here')
+except TypeError:
+    print('TypeError')
diff --git a/tests/cpydiff/modules_struct_fewargs.py b/tests/cpydiff/modules_struct_fewargs.py
new file mode 100644
index 000000000..08d32ca67
--- /dev/null
+++ b/tests/cpydiff/modules_struct_fewargs.py
@@ -0,0 +1,12 @@
+"""
+categories: Modules,struct
+description: Struct pack with too few args, not checked by uPy
+cause: Unknown
+workaround: Unknown
+"""
+import struct
+try:
+    print(struct.pack('bb', 1))
+    print('Should not get here')
+except:
+    print('struct.error')
diff --git a/tests/cpydiff/modules_struct_manyargs.py b/tests/cpydiff/modules_struct_manyargs.py
new file mode 100644
index 000000000..cdbb5c672
--- /dev/null
+++ b/tests/cpydiff/modules_struct_manyargs.py
@@ -0,0 +1,12 @@
+"""
+categories: Modules,struct
+description: Struct pack with too many args, not checked by uPy
+cause: Unknown
+workaround: Unknown
+"""
+import struct
+try:
+    print(struct.pack('bb', 1, 2, 3))
+    print('Should not get here')
+except:
+    print('struct.error')
diff --git a/tests/cpydiff/modules_sys_stdassign.py b/tests/cpydiff/modules_sys_stdassign.py
new file mode 100644
index 000000000..096af430e
--- /dev/null
+++ b/tests/cpydiff/modules_sys_stdassign.py
@@ -0,0 +1,9 @@
+"""
+categories: Modules,sys
+description: Override sys.stdin, sys.stdout and sys.stderr. Impossible as they are stored in read-only memory.
+cause: Unknown
+workaround: Unknown
+"""
+import sys
+sys.stdin = None
+print(sys.stdin)
diff --git a/tests/cpydiff/syntax_spaces.py b/tests/cpydiff/syntax_spaces.py
new file mode 100644
index 000000000..8578a51e2
--- /dev/null
+++ b/tests/cpydiff/syntax_spaces.py
@@ -0,0 +1,18 @@
+"""
+categories: Syntax,Spaces
+description: uPy requires spaces between literal numbers and keywords, CPy doesn't
+cause: Unknown
+workaround: Unknown
+"""
+try:
+    print(eval('1and 0'))
+except SyntaxError:
+    print('Should have worked')
+try:
+    print(eval('1or 0'))
+except SyntaxError:
+    print('Should have worked')
+try:
+    print(eval('1if 1else 0'))
+except SyntaxError:
+    print('Should have worked')
diff --git a/tests/cpydiff/syntax_unicode_nameesc.py b/tests/cpydiff/syntax_unicode_nameesc.py
new file mode 100644
index 000000000..21628c974
--- /dev/null
+++ b/tests/cpydiff/syntax_unicode_nameesc.py
@@ -0,0 +1,7 @@
+"""
+categories: Syntax,Unicode
+description: Unicode name escapes are not implemented
+cause: Unknown
+workaround: Unknown
+"""
+print("\N{LATIN SMALL LETTER A}")
diff --git a/tests/cpydiff/types_bytearray_sliceassign.py b/tests/cpydiff/types_bytearray_sliceassign.py
new file mode 100644
index 000000000..e4068b04b
--- /dev/null
+++ b/tests/cpydiff/types_bytearray_sliceassign.py
@@ -0,0 +1,9 @@
+"""
+categories: Types,bytearray
+description: Array slice assignment with unsupported RHS
+cause: Unknown
+workaround: Unknown
+"""
+b = bytearray(4)
+b[0:1] = [1, 2]
+print(b)
diff --git a/tests/cpydiff/types_bytes_keywords.py b/tests/cpydiff/types_bytes_keywords.py
new file mode 100644
index 000000000..35119e28f
--- /dev/null
+++ b/tests/cpydiff/types_bytes_keywords.py
@@ -0,0 +1,7 @@
+"""
+categories: Types,bytes
+description: bytes(...) with keywords not implemented
+cause: Unknown
+workaround: Input the encoding format directly. eg. ``print(bytes('abc', 'utf-8'))``
+"""
+print(bytes('abc', encoding='utf8'))
diff --git a/tests/cpydiff/types_bytes_subscrstep.py b/tests/cpydiff/types_bytes_subscrstep.py
new file mode 100644
index 000000000..fd1602d65
--- /dev/null
+++ b/tests/cpydiff/types_bytes_subscrstep.py
@@ -0,0 +1,7 @@
+"""
+categories: Types,bytes
+description: Bytes subscr with step != 1 not implemented
+cause: Unknown
+workaround: Unknown
+"""
+print(b'123'[0:3:2])
diff --git a/tests/cpydiff/types_exception_chaining.py b/tests/cpydiff/types_exception_chaining.py
new file mode 100644
index 000000000..836c4eb3e
--- /dev/null
+++ b/tests/cpydiff/types_exception_chaining.py
@@ -0,0 +1,10 @@
+"""
+categories: Types,Exception
+description: Exception chaining not implemented
+cause: Unknown
+workaround: Unknown
+"""
+try:
+    raise TypeError
+except TypeError:
+    raise ValueError
diff --git a/tests/cpydiff/types_exception_instancevar.py b/tests/cpydiff/types_exception_instancevar.py
new file mode 100644
index 000000000..d1015e96c
--- /dev/null
+++ b/tests/cpydiff/types_exception_instancevar.py
@@ -0,0 +1,9 @@
+"""
+categories: Types,Exception
+description: Assign instance variable to exception
+cause: Unknown
+workaround: Unknown
+"""
+e = Exception()
+e.x = 0
+print(e.x)
diff --git a/tests/cpydiff/types_exception_loops.py b/tests/cpydiff/types_exception_loops.py
new file mode 100644
index 000000000..a142e4757
--- /dev/null
+++ b/tests/cpydiff/types_exception_loops.py
@@ -0,0 +1,12 @@
+"""
+categories: Types,Exception
+description: While loop guards will obscure exception line number reporting due to being optimised onto the end of the code block
+cause: Unknown
+workaround: Unknown
+"""
+l = ["-foo", "-bar"]
+
+i = 0
+while l[i][0] == "-":
+    print("iter")
+    i += 1
diff --git a/tests/cpydiff/types_exception_subclassinit.py b/tests/cpydiff/types_exception_subclassinit.py
new file mode 100644
index 000000000..177094646
--- /dev/null
+++ b/tests/cpydiff/types_exception_subclassinit.py
@@ -0,0 +1,11 @@
+"""
+categories: Types,Exception
+description: Exception.__init__ raises TypeError if overridden and called by subclass
+cause: Unknown
+workaround: Unknown
+"""
+class A(Exception):
+    def __init__(self):
+        Exception.__init__(self)
+
+a = A()
diff --git a/tests/cpydiff/types_float_rounding.py b/tests/cpydiff/types_float_rounding.py
new file mode 100644
index 000000000..647f61ba2
--- /dev/null
+++ b/tests/cpydiff/types_float_rounding.py
@@ -0,0 +1,9 @@
+"""
+categories: Types,float
+description: uPy and CPython outputs formats differ
+cause: Unknown
+workaround: Unknown
+"""
+print('%.1g' % -9.9)
+print('%.1e' % 9.99)
+print('%.1e' % 0.999)
diff --git a/tests/cpydiff/types_int_subclassconv.py b/tests/cpydiff/types_int_subclassconv.py
new file mode 100644
index 000000000..565fbad4b
--- /dev/null
+++ b/tests/cpydiff/types_int_subclassconv.py
@@ -0,0 +1,11 @@
+"""
+categories: Types,int
+description: No int conversion for int-derived types available
+cause: Unknown
+workaround: Unknown
+"""
+class A(int):
+    __add__ = lambda self, other: A(int(self) + other)
+
+a = A(42)
+print(a+a)
diff --git a/tests/cpydiff/types_int_tobytesfloat.py b/tests/cpydiff/types_int_tobytesfloat.py
new file mode 100644
index 000000000..5d5b980fa
--- /dev/null
+++ b/tests/cpydiff/types_int_tobytesfloat.py
@@ -0,0 +1,10 @@
+"""
+categories: Types,int
+description: Incorrect error message when passing float into to_bytes
+cause: Unknown
+workaround: Unknown
+"""
+try:
+    int('1').to_bytes(1.0)
+except TypeError as e:
+    print(e)
diff --git a/tests/cpydiff/types_list_delete_subscrstep.py b/tests/cpydiff/types_list_delete_subscrstep.py
new file mode 100644
index 000000000..f524fa8dc
--- /dev/null
+++ b/tests/cpydiff/types_list_delete_subscrstep.py
@@ -0,0 +1,9 @@
+"""
+categories: Types,list
+description: List delete with step != 1 not implemented
+cause: Unknown
+workaround: Unknown
+"""
+l = [1, 2, 3, 4]
+del l[0:4:2]
+print(l)
diff --git a/tests/cpydiff/types_list_store_noniter.py b/tests/cpydiff/types_list_store_noniter.py
new file mode 100644
index 000000000..1d69b4a82
--- /dev/null
+++ b/tests/cpydiff/types_list_store_noniter.py
@@ -0,0 +1,9 @@
+"""
+categories: Types,list
+description: List slice-store with non-iterable on RHS is not implemented
+cause: RHS is restricted to be a tuple or list
+workaround: Use ``list(<iter>)`` on RHS to convert the iterable to a list
+"""
+l = [10, 20]
+l[0:1] = range(4)
+print(l)
diff --git a/tests/cpydiff/types_list_store_subscrstep.py b/tests/cpydiff/types_list_store_subscrstep.py
new file mode 100644
index 000000000..2de2e1a3c
--- /dev/null
+++ b/tests/cpydiff/types_list_store_subscrstep.py
@@ -0,0 +1,9 @@
+"""
+categories: Types,list
+description: List store with step != 1 not implemented
+cause: Unknown
+workaround: Unknown
+"""
+l = [1, 2, 3, 4]
+l[0:4:2] = [5, 6]
+print(l)
diff --git a/tests/cpydiff/types_str_decodeerror.py b/tests/cpydiff/types_str_decodeerror.py
new file mode 100644
index 000000000..944db98fe
--- /dev/null
+++ b/tests/cpydiff/types_str_decodeerror.py
@@ -0,0 +1,11 @@
+"""
+categories: Types,str
+description: UnicodeDecodeError not raised when expected
+cause: Unknown
+workaround: Unknown
+"""
+try:
+    print(repr(str(b"\xa1\x80", 'utf8')))
+    print('Should not get here')
+except UnicodeDecodeError:
+    print('UnicodeDecodeError')
diff --git a/tests/cpydiff/types_str_endswith.py b/tests/cpydiff/types_str_endswith.py
new file mode 100644
index 000000000..ac2600bd2
--- /dev/null
+++ b/tests/cpydiff/types_str_endswith.py
@@ -0,0 +1,7 @@
+"""
+categories: Types,str
+description: Start/end indices such as str.endswith(s, start) not implemented
+cause: Unknown
+workaround: Unknown
+"""
+print('abc'.endswith('c', 1))
diff --git a/tests/cpydiff/types_str_formatsubscr.py b/tests/cpydiff/types_str_formatsubscr.py
new file mode 100644
index 000000000..dd1d8d33d
--- /dev/null
+++ b/tests/cpydiff/types_str_formatsubscr.py
@@ -0,0 +1,7 @@
+"""
+categories: Types,str
+description: Attributes/subscr not implemented
+cause: Unknown
+workaround: Unknown
+"""
+print('{a[0]}'.format(a=[1, 2]))
diff --git a/tests/cpydiff/types_str_keywords.py b/tests/cpydiff/types_str_keywords.py
new file mode 100644
index 000000000..b336b1a73
--- /dev/null
+++ b/tests/cpydiff/types_str_keywords.py
@@ -0,0 +1,7 @@
+"""
+categories: Types,str
+description: str(...) with keywords not implemented
+cause: Unknown
+workaround: Input the encoding format directly. eg ``print(bytes('abc', 'utf-8'))``
+"""
+print(str(b'abc', encoding='utf8'))
diff --git a/tests/cpydiff/types_str_rsplitnone.py b/tests/cpydiff/types_str_rsplitnone.py
new file mode 100644
index 000000000..cadf86987
--- /dev/null
+++ b/tests/cpydiff/types_str_rsplitnone.py
@@ -0,0 +1,7 @@
+"""
+categories: Types,str
+description: None as first argument for rsplit such as str.rsplit(None, n) not implemented
+cause: Unknown
+workaround: Unknown
+"""
+print('a a a'.rsplit(None, 1))
diff --git a/tests/cpydiff/types_str_subclassequality.py b/tests/cpydiff/types_str_subclassequality.py
new file mode 100644
index 000000000..8aec1ea78
--- /dev/null
+++ b/tests/cpydiff/types_str_subclassequality.py
@@ -0,0 +1,11 @@
+"""
+categories: Types,str
+description: Instance of a subclass of str cannot be compared for equality with an instance of a str
+cause: Unknown
+workaround: Unknown
+"""
+class S(str):
+    pass
+
+s = S('hello')
+print(s == 'hello')
diff --git a/tests/cpydiff/types_str_subscrstep.py b/tests/cpydiff/types_str_subscrstep.py
new file mode 100644
index 000000000..0c2fce1b1
--- /dev/null
+++ b/tests/cpydiff/types_str_subscrstep.py
@@ -0,0 +1,7 @@
+"""
+categories: Types,str
+description: Subscript with step != 1 is not yet implemented
+cause: Unknown
+workaround: Unknown
+"""
+print('abcdefghi'[0:9:2])
diff --git a/tests/cpydiff/types_tuple_subscrstep.py b/tests/cpydiff/types_tuple_subscrstep.py
new file mode 100644
index 000000000..f90f3c5bf
--- /dev/null
+++ b/tests/cpydiff/types_tuple_subscrstep.py
@@ -0,0 +1,7 @@
+"""
+categories: Types,tuple
+description: Tuple load with step != 1 not implemented
+cause: Unknown
+workaround: Unknown
+"""
+print((1, 2, 3, 4)[0:4:2])