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;; String literals (including bracket strings and docstrings),
;; plus f-strings
(import
re
pytest)
(defn test-encoding-nightmares []
(assert (= (len "ℵℵℵ♥♥♥\t♥♥\r\n") 11)))
(defn test-quote-bracket-string-delim []
(assert (= (. '#[my delim[hello world]my delim] brackets) "my delim"))
(assert (= (. '#[[squid]] brackets) ""))
(assert (is (. '"squid" brackets) None)))
(defn test-docstrings []
(defn f [] "docstring" 5)
(assert (= (. f __doc__) "docstring"))
; a single string is the return value, not a docstring
; (https://github.com/hylang/hy/issues/1402)
(defn f3 [] "not a docstring")
(assert (is (. f3 __doc__) None))
(assert (= (f3) "not a docstring")))
(defn test-module-docstring []
(import tests.resources.module-docstring-example :as m)
(assert (= m.__doc__ "This is the module docstring."))
(assert (= m.foo 5)))
(defn test-format-strings []
(assert (= f"hello world" "hello world"))
(assert (= f"hello {(+ 1 1)} world" "hello 2 world"))
(assert (= f"a{ (.upper (+ "g" "k")) }z" "aGKz"))
(assert (= f"a{1}{2}b" "a12b"))
; Referring to a variable
(setv p "xyzzy")
(assert (= f"h{p}j" "hxyzzyj"))
; Including a statement and setting a variable
(assert (= f"a{(do (setv floop 4) (* floop 2))}z" "a8z"))
(assert (= floop 4))
; Comments
(assert (= f"a{(+ 1
2 ; This is a comment.
3)}z" "a6z"))
; Newlines in replacement fields
(assert (= f"ey {"bee
cee"} dee" "ey bee\ncee dee"))
; Conversion characters and format specifiers
(setv p:9 "other")
(setv !r "bar")
(assert (= f"a{p !r}" "a'xyzzy'"))
(assert (= f"a{p :9}" "axyzzy "))
(assert (= f"a{p:9}" "aother"))
(assert (= f"a{p !r :9}" "a'xyzzy' "))
(assert (= f"a{p !r:9}" "a'xyzzy' "))
(assert (= f"a{p:9 :9}" "aother "))
(assert (= f"a{!r}" "abar"))
(assert (= f"a{!r !r}" "a'bar'"))
; Fun with `r`
(assert (= f"hello {r"\n"}" r"hello \n"))
(assert (= f"hello {"\n"}" "hello \n"))
; Braces escaped via doubling
(assert (= f"ab{{cde" "ab{cde"))
(assert (= f"ab{{cde}}}}fg{{{{{{" "ab{cde}}fg{{{"))
(assert (= f"ab{{{(+ 1 1)}}}" "ab{2}"))
; Nested replacement fields
(assert (= f"{2 :{(+ 2 2)}}" " 2"))
(setv value 12.34 width 10 precision 4)
(assert (= f"result: {value :{width}.{precision}}" "result: 12.34"))
; Nested replacement fields with ! and :
(defclass C [object]
(defn __format__ [self format-spec]
(+ "C[" format-spec "]")))
(assert (= f"{(C) : {(str (+ 1 1)) !r :x<5}}" "C[ '2'xx]"))
; \N sequences
; https://github.com/hylang/hy/issues/2321
(setv ampersand "wich")
(assert (= f"sand{ampersand} \N{ampersand} chips" "sandwich & chips"))
; Format bracket strings
(assert (= #[f[a{p !r :9}]f] "a'xyzzy' "))
(assert (= #[f-string[result: {value :{width}.{precision}}]f-string]
"result: 12.34"))
; https://github.com/hylang/hy/issues/2419
(assert (=
#[f[{{escaped braces}} \n {"not escaped"}]f]
"{escaped braces} \\n not escaped"))
; https://github.com/hylang/hy/issues/2474
(assert (= #[f["{0}"]f] "\"0\""))
; Quoting shouldn't evaluate the f-string immediately
; https://github.com/hylang/hy/issues/1844
(setv quoted 'f"hello {world}")
(assert (isinstance quoted hy.models.FString))
(with [(pytest.raises NameError)]
(hy.eval quoted))
(setv world "goodbye")
(assert (= (hy.eval quoted) "hello goodbye"))
;; '=' debugging syntax.
(setv foo "bar")
(assert (= f"{foo =}" "foo ='bar'"))
;; Whitespace is preserved.
(assert (= f"xyz{ foo = }" "xyz foo = 'bar'"))
;; Explicit conversion is applied.
(assert (= f"{ foo = !s}" " foo = bar"))
;; Format spec supercedes implicit conversion.
(setv pi 3.141593 fill "_")
(assert (= f"{pi = :{fill}^8.2f}" "pi = __3.14__"))
;; Format spec doesn't clobber the explicit conversion.
(with [(pytest.raises
ValueError
:match r"Unknown format code '?f'? for object of type 'str'")]
f"{pi =!s:.3f}")
;; Nested "=" is parsed, but fails at runtime, like Python.
(setv width 7)
(with [(pytest.raises
ValueError
:match r"I|invalid format spec(?:ifier)?")]
f"{pi =:{fill =}^{width =}.2f}"))
(defn test-format-string-repr-roundtrip []
(for [orig [
'f"hello {(+ 1 1)} world"
'f"a{p !r:9}"
'f"{ foo = !s}"]]
(setv new (eval (repr orig)))
(assert (= (len new) (len orig)))
(for [[n o] (zip new orig)]
(when (hasattr o "conversion")
(assert (= n.conversion o.conversion)))
(assert (= n o)))))
(defn test-repr-with-brackets []
(assert (= (repr '"foo") "hy.models.String('foo')"))
(assert (= (repr '#[[foo]]) "hy.models.String('foo', brackets='')"))
(assert (= (repr '#[xx[foo]xx]) "hy.models.String('foo', brackets='xx')"))
(assert (= (repr '#[xx[]xx]) "hy.models.String('', brackets='xx')"))
(for [g [repr str]]
(defn f [x] (re.sub r"\n\s+" "" (g x) :count 1))
(assert (= (f 'f"foo")
"hy.models.FString([hy.models.String('foo')])"))
(assert (= (f '#[f[foo]f])
"hy.models.FString([hy.models.String('foo')], brackets='f')"))
(assert (= (f '#[f-x[foo]f-x])
"hy.models.FString([hy.models.String('foo')], brackets='f-x')"))
(assert (= (f '#[f-x[]f-x])
"hy.models.FString(brackets='f-x')"))))
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