Issue #20368: Add tests for Tkinter methods exprstring(), exprdouble(),

exprlong() and exprboolean().

1 files changed, 135 insertions, 0 deletions

diff --git a/Lib/test/test_tcl.py b/Lib/test/test_tcl.py
index 2ed85dde09..b880fcbe63 100644
--- a/Lib/test/test_tcl.py
+++ b/Lib/test/test_tcl.py
@@ -177,6 +177,141 @@ class TclTest(unittest.TestCase):
         # exit code must be zero
         self.assertEqual(f.close(), None)
 
+    def test_exprstring(self):
+        tcl = self.interp
+        tcl.call('set', 'a', 3)
+        tcl.call('set', 'b', 6)
+        def check(expr, expected):
+            result = tcl.exprstring(expr)
+            self.assertEqual(result, expected)
+            self.assertIsInstance(result, str)
+
+        self.assertRaises(TypeError, tcl.exprstring)
+        self.assertRaises(TypeError, tcl.exprstring, '8.2', '+6')
+        self.assertRaises(TypeError, tcl.exprstring, b'8.2 + 6')
+        self.assertRaises(TclError, tcl.exprstring, 'spam')
+        check('', '0')
+        check('8.2 + 6', '14.2')
+        check('2**64', str(2**64))
+        check('3.1 + $a', '6.1')
+        check('2 + "$a.$b"', '5.6')
+        check('4*[llength "6 2"]', '8')
+        check('{word one} < "word $a"', '0')
+        check('4*2 < 7', '0')
+        check('hypot($a, 4)', '5.0')
+        check('5 / 4', '1')
+        check('5 / 4.0', '1.25')
+        check('5 / ( [string length "abcd"] + 0.0 )', '1.25')
+        check('20.0/5.0', '4.0')
+        check('"0x03" > "2"', '1')
+        check('[string length "a\xbd\u20ac"]', '3')
+        check(r'[string length "a\xbd\u20ac"]', '3')
+        check('"abc"', 'abc')
+        check('"a\xbd\u20ac"', 'a\xbd\u20ac')
+        check(r'"a\xbd\u20ac"', 'a\xbd\u20ac')
+
+    def test_exprdouble(self):
+        tcl = self.interp
+        tcl.call('set', 'a', 3)
+        tcl.call('set', 'b', 6)
+        def check(expr, expected):
+            result = tcl.exprdouble(expr)
+            self.assertEqual(result, expected)
+            self.assertIsInstance(result, float)
+
+        self.assertRaises(TypeError, tcl.exprdouble)
+        self.assertRaises(TypeError, tcl.exprdouble, '8.2', '+6')
+        self.assertRaises(TypeError, tcl.exprdouble, b'8.2 + 6')
+        self.assertRaises(TclError, tcl.exprdouble, 'spam')
+        check('', 0.0)
+        check('8.2 + 6', 14.2)
+        check('2**64', float(2**64))
+        check('3.1 + $a', 6.1)
+        check('2 + "$a.$b"', 5.6)
+        check('4*[llength "6 2"]', 8.0)
+        check('{word one} < "word $a"', 0.0)
+        check('4*2 < 7', 0.0)
+        check('hypot($a, 4)', 5.0)
+        check('5 / 4', 1.0)
+        check('5 / 4.0', 1.25)
+        check('5 / ( [string length "abcd"] + 0.0 )', 1.25)
+        check('20.0/5.0', 4.0)
+        check('"0x03" > "2"', 1.0)
+        check('[string length "a\xbd\u20ac"]', 3.0)
+        check(r'[string length "a\xbd\u20ac"]', 3.0)
+        self.assertRaises(TclError, tcl.exprdouble, '"abc"')
+
+    def test_exprlong(self):
+        tcl = self.interp
+        tcl.call('set', 'a', 3)
+        tcl.call('set', 'b', 6)
+        def check(expr, expected):
+            result = tcl.exprlong(expr)
+            self.assertEqual(result, expected)
+            self.assertIsInstance(result, int)
+
+        self.assertRaises(TypeError, tcl.exprlong)
+        self.assertRaises(TypeError, tcl.exprlong, '8.2', '+6')
+        self.assertRaises(TypeError, tcl.exprlong, b'8.2 + 6')
+        self.assertRaises(TclError, tcl.exprlong, 'spam')
+        check('', 0)
+        check('8.2 + 6', 14)
+        self.assertRaises(TclError, tcl.exprlong, '2**64')
+        check('3.1 + $a', 6)
+        check('2 + "$a.$b"', 5)
+        check('4*[llength "6 2"]', 8)
+        check('{word one} < "word $a"', 0)
+        check('4*2 < 7', 0)
+        check('hypot($a, 4)', 5)
+        check('5 / 4', 1)
+        check('5 / 4.0', 1)
+        check('5 / ( [string length "abcd"] + 0.0 )', 1)
+        check('20.0/5.0', 4)
+        check('"0x03" > "2"', 1)
+        check('[string length "a\xbd\u20ac"]', 3)
+        check(r'[string length "a\xbd\u20ac"]', 3)
+        self.assertRaises(TclError, tcl.exprlong, '"abc"')
+
+    def test_exprboolean(self):
+        tcl = self.interp
+        tcl.call('set', 'a', 3)
+        tcl.call('set', 'b', 6)
+        def check(expr, expected):
+            result = tcl.exprboolean(expr)
+            self.assertEqual(result, expected)
+            self.assertIsInstance(result, int)
+            self.assertNotIsInstance(result, bool)
+
+        self.assertRaises(TypeError, tcl.exprboolean)
+        self.assertRaises(TypeError, tcl.exprboolean, '8.2', '+6')
+        self.assertRaises(TypeError, tcl.exprboolean, b'8.2 + 6')
+        self.assertRaises(TclError, tcl.exprboolean, 'spam')
+        check('', False)
+        for value in ('0', 'false', 'no', 'off'):
+            check(value, False)
+            check('"%s"' % value, False)
+            check('{%s}' % value, False)
+        for value in ('1', 'true', 'yes', 'on'):
+            check(value, True)
+            check('"%s"' % value, True)
+            check('{%s}' % value, True)
+        check('8.2 + 6', True)
+        check('2**64', True)
+        check('3.1 + $a', True)
+        check('2 + "$a.$b"', True)
+        check('4*[llength "6 2"]', True)
+        check('{word one} < "word $a"', False)
+        check('4*2 < 7', False)
+        check('hypot($a, 4)', True)
+        check('5 / 4', True)
+        check('5 / 4.0', True)
+        check('5 / ( [string length "abcd"] + 0.0 )', True)
+        check('20.0/5.0', True)
+        check('"0x03" > "2"', True)
+        check('[string length "a\xbd\u20ac"]', True)
+        check(r'[string length "a\xbd\u20ac"]', True)
+        self.assertRaises(TclError, tcl.exprboolean, '"abc"')
+
     def test_passing_values(self):
         def passValue(value):
             return self.interp.call('set', '_', value)