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-rw-r--r--graphics/asymptote/tests/io/csv.asy18
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diff --git a/graphics/asymptote/tests/io/csv.asy b/graphics/asymptote/tests/io/csv.asy
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+++ b/graphics/asymptote/tests/io/csv.asy
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+import TestLib;
+
+StartTest("csv");
+{
+ real[] a=input("io/input_with_nan.csv").csv();
+ assert(a.length == 20);
+ for (int i=0; i<4; ++i)
+ assert(a[i] == i);
+ for (int i=4; i<8; ++i)
+ assert(isnan(a[i]));
+ for (int i=8; i<12; ++i)
+ assert(isnan(a[i]));
+ for (int i=12; i<16; ++i)
+ assert(a[i] == inf);
+ for (int i=16; i<20; ++i)
+ assert(a[i] == -inf);
+}
+EndTest();