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-rw-r--r--Build/source/utils/asymptote/tests/arith/real.asy18
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diff --git a/Build/source/utils/asymptote/tests/arith/real.asy b/Build/source/utils/asymptote/tests/arith/real.asy
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+++ b/Build/source/utils/asymptote/tests/arith/real.asy
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+// Real arithmetic.
+
+import TestLib;
+StartTest("real error");
+assert((1.0-1.0) < realEpsilon);
+EndTest();
+StartTest("real addition");
+assert((1.0+1.0) == (2.0));
+EndTest();
+StartTest("real subtraction");
+assert((2.0-1.0) == (1.0));
+EndTest();
+StartTest("real multiplication");
+assert((2.0*2.0) == (4.0));
+EndTest();
+StartTest("real division");
+assert((4.0/2.0) == (2.0));
+EndTest();