[lasem] [Tests] Add a case test (from http://xbeta.org/wiki/show/itex+environments).

[Emmanuel Pacaud <emmanuel src gnome org>]

commit 055400bc96feb2b4d965faaf758ddb95ab2fa765
Author: Emmanuel Pacaud <emmanuel gnome org>
Date:   Mon Oct 26 17:03:22 2009 +0100

    [Tests] Add a case test (from http://xbeta.org/wiki/show/itex+environments).

 test/mathml/tex/misc/cases.png |  Bin 0 -> 2867 bytes
 test/mathml/tex/misc/cases.tex |    7 +++++++
 2 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/test/mathml/tex/misc/cases.png b/test/mathml/tex/misc/cases.png
new file mode 100644
index 0000000..151be72
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diff --git a/test/mathml/tex/misc/cases.tex b/test/mathml/tex/misc/cases.tex
new file mode 100644
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--- /dev/null
+++ b/test/mathml/tex/misc/cases.tex
@@ -0,0 +1,7 @@
+$$
+f(x|\lambda) =
+\begin{cases}
+\lambda e^{-\lambda x} & x \geq 0, \\
+0 & \text{otherwise}
+\end{cases}
+$$