Migrate string tests to Skylark test suite.

RELNOTES: None.
PiperOrigin-RevId: 190785580

3 files changed, 209 insertions, 0 deletions

diff --git a/src/test/skylark/testdata/string_find.sky b/src/test/skylark/testdata/string_find.sky
new file mode 100644
index 0000000000..abe8adf45a
--- /dev/null
+++ b/src/test/skylark/testdata/string_find.sky
@@ -0,0 +1,31 @@
+assert_eq('banana'.find('na'), 2)
+assert_eq('banana'.find('na', 3, 1), -1)
+assert_eq('aaaa'.find('a', 1, 1), -1)
+assert_eq('aaaa'.find('a', 1, 50), 1)
+assert_eq('aaaa'.find('aaaaa'), -1)
+assert_eq('abababa'.find('ab', 1), 2)
+assert_eq('abababa'.find('ab', 0), 0)
+assert_eq('abababa'.find('ab', -1), -1)
+assert_eq('abababa'.find('ab', -2), -1)
+assert_eq('abababa'.find('ab', -3), 4)
+assert_eq('abababa'.find('ab', 0, 1), -1)
+assert_eq('abababa'.find('ab', 0, 2), 0)
+assert_eq('abababa'.find('ab', -1000), 0)
+assert_eq('abababa'.find('ab', 1000), -1)
+assert_eq(''.find('a', 1), -1)
+
+assert_eq('banana'.rfind('na'), 4)
+assert_eq('banana'.rfind('na', 3, 1), -1)
+assert_eq('aaaa'.rfind('a', 1, 1), -1)
+assert_eq('aaaa'.rfind('a', 1, 50), 3)
+assert_eq('aaaa'.rfind('aaaaa'), -1)
+assert_eq('abababa'.rfind('ab', 1), 4)
+assert_eq('abababa'.rfind('ab', 0), 4)
+assert_eq('abababa'.rfind('ab', -1), -1)
+assert_eq('abababa'.rfind('ab', -2), -1)
+assert_eq('abababa'.rfind('ab', -3), 4)
+assert_eq('abababa'.rfind('ab', 0, 1), -1)
+assert_eq('abababa'.rfind('ab', 0, 2), 0)
+assert_eq('abababa'.rfind('ab', -1000), 4)
+assert_eq('abababa'.rfind('ab', 1000), -1)
+assert_eq(''.rfind('a', 1), -1)
diff --git a/src/test/skylark/testdata/string_misc.sky b/src/test/skylark/testdata/string_misc.sky
new file mode 100644
index 0000000000..901d7f3091
--- /dev/null
+++ b/src/test/skylark/testdata/string_misc.sky
@@ -0,0 +1,118 @@
+# join
+assert_eq('-'.join(['a', 'b', 'c']), "a-b-c")
+
+---
+join(' ', ['a', 'b', 'c']) ### name 'join' is not defined
+---
+
+assert_eq(''.join([(x + '*') for x in ['a', 'b', 'c']]), "a*b*c*")
+li = [(y + '*' + z + '|') for y in ['a', 'b', 'c'] for z in ['d', 'e']]
+assert_eq(''.join(li), "a*d|a*e|b*d|b*e|c*d|c*e|")
+
+# lower, upper
+assert_eq('Blah Blah'.lower(), "blah blah")
+assert_eq('ein bier'.upper(), "EIN BIER")
+assert_eq(''.upper(), "")
+
+# title
+assert_eq('this is a very simple test'.title(), "This Is A Very Simple Test")
+assert_eq('Do We Keep Capital Letters?'.title(), "Do We Keep Capital Letters?")
+assert_eq("this isn't just an ol' apostrophe test".title(),
+          "This Isn'T Just An Ol' Apostrophe Test")
+assert_eq('Let us test crazy characters: _bla.exe//foo:bla(test$class)'.title(),
+          "Let Us Test Crazy Characters: _Bla.Exe//Foo:Bla(Test$Class)")
+assert_eq('WE HAve tO lOWERCASE soMEthING heRE, AI?'.title(),
+          "We Have To Lowercase Something Here, Ai?")
+assert_eq('wh4t ab0ut s0me numb3rs'.title(), "Wh4T Ab0Ut S0Me Numb3Rs")
+
+# capitalize
+assert_eq('hello world'.capitalize(), "Hello world")
+assert_eq('HELLO WORLD'.capitalize(), "Hello world")
+assert_eq(''.capitalize(), "")
+assert_eq('12 lower UPPER 34'.capitalize(), "12 lower upper 34")
+
+
+# replace
+assert_eq('banana'.replace('a', 'e'), "benene")
+assert_eq('banana'.replace('a', '$()'), "b$()n$()n$()")
+assert_eq('banana'.replace('a', '$'), "b$n$n$")
+assert_eq('banana'.replace('a', '\\'), "b\\n\\n\\")
+assert_eq('b$()n$()n$()'.replace('$()', '$($())'), "b$($())n$($())n$($())")
+assert_eq('b\\n\\n\\'.replace('\\', '$()'), "b$()n$()n$()")
+
+assert_eq('banana'.replace('a', 'e', 2), "benena")
+
+# index, rindex
+assert_eq('banana'.index('na'), 2)
+assert_eq('abababa'.index('ab', 1), 2)
+assert_eq('banana'.rindex('na'), 4)
+assert_eq('abababa'.rindex('ab', 1), 4)
+---
+'banana'.index('foo') ### substring \"foo\" not found in \"banana\"
+---
+'banana'.rindex('foo') ### substring \"foo\" not found in \"banana\"
+---
+
+# endswith
+assert_eq('Apricot'.endswith('cot'), True)
+assert_eq('a'.endswith(''), True)
+assert_eq(''.endswith(''), True)
+assert_eq('Apricot'.endswith('co'), False)
+assert_eq('Apricot'.endswith('co', -1), False)
+assert_eq('abcd'.endswith('c', -2, -1), True)
+assert_eq('abcd'.endswith('c', 1, 8), False)
+assert_eq('abcd'.endswith('d', 1, 8), True)
+
+# startswith
+assert_eq('Apricot'.startswith('Apr'), True)
+assert_eq('Apricot'.startswith('A'), True)
+assert_eq('Apricot'.startswith(''), True)
+assert_eq('Apricot'.startswith('z'), False)
+assert_eq(''.startswith(''), True)
+assert_eq(''.startswith('a'), False)
+
+# substring
+assert_eq('012345678'[0:-1], "01234567")
+assert_eq('012345678'[2:4], "23")
+assert_eq('012345678'[-5:-3], "45")
+assert_eq('012345678'[2:2], "")
+assert_eq('012345678'[2:], "2345678")
+assert_eq('012345678'[:3], "012")
+assert_eq('012345678'[-1:], "8")
+assert_eq('012345678'[:], "012345678")
+assert_eq('012345678'[-1:2], "")
+assert_eq('012345678'[4:2], "")
+
+# reversed
+# to be removed, strings should not be iterable
+assert_eq(reversed(''), [])
+assert_eq(reversed('a'), ['a'])
+assert_eq(reversed('abc'), ['c', 'b', 'a'])
+assert_eq(reversed('__test  '), [' ', ' ', 't', 's', 'e', 't', '_', '_'])
+assert_eq(reversed('bbb'), ['b', 'b', 'b'])
+
+# count
+assert_eq('abc'.count('a'), 1)
+assert_eq('abc'.count('b'), 1)
+assert_eq('abc'.count('c'), 1)
+assert_eq('abbc'.count('b'), 2)
+assert_eq('aba'.count('a'), 2)
+assert_eq('aaa'.count('aa'), 1)
+assert_eq('aaaa'.count('aa'), 2)
+assert_eq('abc'.count('a', 0), 1)
+assert_eq('abc'.count('a', 1), 0)
+assert_eq('abc'.count('c', 0, 3), 1)
+assert_eq('abc'.count('c', 0, 2), 0)
+assert_eq('abc'.count('a', -1), 0)
+assert_eq('abc'.count('c', -1), 1)
+assert_eq('abc'.count('c', 0, 5), 1)
+assert_eq('abc'.count('c', 0, -1), 0)
+assert_eq('abc'.count('a', 0, -1), 1)
+
+# isalpha
+assert_eq(''.isalpha(), False)
+assert_eq('abz'.isalpha(), True)
+assert_eq('a1'.isalpha(), False)
+assert_eq('a '.isalpha(), False)
+assert_eq('A'.isalpha(), True)
+assert_eq('AbZ'.isalpha(), True)
diff --git a/src/test/skylark/testdata/string_slice_index.sky b/src/test/skylark/testdata/string_slice_index.sky
new file mode 100644
index 0000000000..88a0d5b89e
--- /dev/null
+++ b/src/test/skylark/testdata/string_slice_index.sky
@@ -0,0 +1,60 @@
+# indexing
+assert_eq('somestring'[0], "s")
+assert_eq('somestring'[1], "o")
+assert_eq('somestring'[4], "s")
+assert_eq('somestring'[9], "g")
+assert_eq('somestring'[-1], "g")
+assert_eq('somestring'[-2], "n")
+assert_eq('somestring'[-10], "s")
+
+---
+'abcdef'[10] ### index out of range
+---
+'abcdef'[-11] ### index out of range
+---
+
+# slicing
+assert_eq('0123'[0:-1], "012")
+assert_eq('012345'[2:4], "23")
+assert_eq('012345'[-2:-1], "4")
+assert_eq(''[1:2], "")
+assert_eq('012'[1:0], "")
+assert_eq('0123'[-10:10], "0123")
+
+assert_eq('01234'[::1], "01234")
+assert_eq('01234'[1::1], "1234")
+assert_eq('01234'[:2:1], "01")
+assert_eq('01234'[1:3:1], "12")
+assert_eq('01234'[-4:-2:1], "12")
+assert_eq('01234'[-10:10:1], "01234")
+assert_eq('01234'[::42], "0")
+
+assert_eq(''[::1], "")
+assert_eq(''[::-1], "")
+
+assert_eq('0123456'[::3], "036")
+assert_eq('01234567'[1:7:3], "14")
+
+assert_eq('01234'[::-1], "43210")
+assert_eq('01234'[4::-1], "43210")
+assert_eq('01234'[:0:-1], "4321")
+assert_eq('01234'[3:1:-1], "32")
+assert_eq('01234'[::-2], "420")
+assert_eq('01234'[::-10], "4")
+
+assert_eq('123'[3:1:1], "")
+assert_eq('123'[1:3:-1], "")
+
+---
+'123'[::0] ### slice step cannot be zero
+---
+'123'[1::0] ### slice step cannot be zero
+---
+'123'[:3:0] ### slice step cannot be zero
+---
+'123'[1:3:0] ### slice step cannot be zero
+---
+'123'['a'::] ### slice start must be an integer, not 'a'
+---
+'123'[:'b':] ### slice end must be an integer, not 'b'
+---