def test_char_range(self):
ctx = ahp.ParseCtx()
ctx.text = 'foobar'
prod = ahp.CharRange('a', 'z')
self.assertTrue(prod.evaluate(ctx))
self.assertPeek(ctx, 'o', (0, 1))
prod = ahp.CharRange('A', 'Z')
self.assertFalse(prod.evaluate(ctx))
self.assertPeek(ctx, 'o', (0, 1))
def test_decl_ref(self):
ctx = ahp.ParseCtx()
ctx.text = '$12345 $67890'
ctx.add_decl(ahp.Decl('digits', ahp.OneOrMore(ahp.CharRange('0',
'9'))))
ctx.add_decl(ahp.Decl('money', ahp.Literal('$'),
ahp.DeclRef('digits')))
prod = ahp.DeclRef('money')
result = prod.evaluate(ctx)
self.assertTrue(result)
self.assertPeek(ctx, ' ', (0, 6))
self.assertAst(result, [
ahp.AstNode('money', '$12345',
(0, 0), ahp.AstNode('digits', '12345', (0, 1)))
])
ctx.next()
result = prod.evaluate(ctx)
self.assertTrue(result)
self.assertPeek(ctx, '', (0, 13))
self.assertAst(result, [
ahp.AstNode('money', '$67890',
(0, 7), ahp.AstNode('digits', '67890', (0, 8)))
])
def test_one_or_more(self):
ctx = ahp.ParseCtx()
ctx.text = '12345.67890'
prod = ahp.OneOrMore(ahp.CharRange('0', '9'))
self.assertTrue(prod.evaluate(ctx))
self.assertPeek(ctx, '.', (0, 5))
self.assertFalse(prod.evaluate(ctx))
self.assertPeek(ctx, '.', (0, 5))
def test_zero_or_more(self):
ctx = ahp.ParseCtx()
ctx.text = '$12345.67890'
prod = ahp.ZeroOrMore(ahp.CharRange('0', '9'))
self.assertTrue(prod.evaluate(ctx))
self.assertPeek(ctx, '$', (0, 0))
ctx.next()
self.assertTrue(prod.evaluate(ctx))
self.assertPeek(ctx, '.', (0, 6))
def test_unreported_decl(self):
ctx = ahp.ParseCtx()
ctx.text = '$12345 $67890'
ctx.add_decl(ahp.Decl('digits', ahp.OneOrMore(ahp.CharRange('0',
'9'))))
ctx.add_decl(
ahp.UnreportedDecl('money', ahp.Literal('$'),
ahp.DeclRef('digits')))
prod = ctx.get_decl('money')
result = prod.evaluate(ctx)
self.assertTrue(result)
self.assertPeek(ctx, ' ', (0, 6))
self.assertAst(result, [])
ctx.next()
result = prod.evaluate(ctx)
self.assertTrue(result)
self.assertPeek(ctx, '', (0, 13))
self.assertAst(result, [])