29883 2016-09-29 15:11:48 +0000 [Qt3Ts] fo-test-d3e4625, fo-test-d3e4630 2016-10-25 14:05:08 +0000 1 1 1 Unclassified XPath / XQuery / XSLT XQuery 3 & XPath 3 Test Suite Candidate Recommendation PC Windows NT RESOLVED FIXED P2 normal --- 1 tim oneil mike public-qt-comments oldest_to_newest 127603 0 tim 2016-09-29 15:11:48 +0000 Using .NET, I get math:tan(math:pi() div 2) to be 16331778728383844.0 and abs($result - 1.633123935319537E16) to be 539375188474.0. Are these tests correct? <test-case name="fo-test-d3e4625"> <description>Test case for math:tan</description> <created by="generate-qt3-test-set.xsl" on="2016-09-26"/> <environment ref="global"/> <test> math:tan(math:pi() div 2) </test> <result> <assert>abs($result - 1.633123935319537E16) lt 1e-5</assert> </result> </test-case> <test-case name="fo-test-d3e4630"> <description>Test case for math:tan</description> <created by="generate-qt3-test-set.xsl" on="2016-09-26"/> <environment ref="global"/> <test> math:tan(-math:pi() div 2) </test> <result> <assert>abs($result - -1.633123935319537E16) lt 1e-5</assert> </result> </test-case> 127952 1 mike 2016-10-25 14:05:08 +0000 The problem is that the "approximately" flag in the markup generates a test for small differences, whereas here the difference between the actual result and the true mathematical result (infinity) is huge. I propose to change the text in the spec to: 1 div math:tan(math:pi() div 2) returns 0.0e0 (approximately). Mathematically, tan(π/2) is positive infinity. But because math:pi() div 2 returns an approximation, the result of math:tan(math:pi() div 2) will be a large but finite number. and similarly for the negative case. The test that is generated will then test that abs(1 div math:tan(math:pi() div 2)) - 0.0e0 is less than some epsilon. I have changed the stylesheet that generates the tests to produce stable names, which are needed for the QT3 results reporting process (as this compares reported test results against the current test catalog).