From 2a89e1f478a489fb57eccba23c3d3d0712641451 Mon Sep 17 00:00:00 2001
From: Chris Rackauckas <accounts@chrisrackauckas.com>
Date: Sun, 5 Apr 2020 16:38:36 -0400
Subject: [PATCH] add README example

---
 test/examples.jl | 16 ++++++++++++++++
 test/runtests.jl |  1 +
 2 files changed, 17 insertions(+)
 create mode 100644 test/examples.jl

diff --git a/test/examples.jl b/test/examples.jl
new file mode 100644
index 0000000..ad8185b
--- /dev/null
+++ b/test/examples.jl
@@ -0,0 +1,16 @@
+fcalls = 0
+function f(dx,x)
+  global fcalls += 1
+  for i in 2:length(x)-1
+    dx[i] = x[i-1] - 2x[i] + x[i+1]
+  end
+  dx[1] = -2x[1] + x[2]
+  dx[end] = x[end-1] - 2x[end]
+  nothing
+end
+
+using SparsityDetection, SparseArrays
+input = rand(10)
+output = similar(input)
+sparsity_pattern = sparsity!(f,output,input)
+jac = Float64.(sparse(sparsity_pattern))
diff --git a/test/runtests.jl b/test/runtests.jl
index 6086591..b52cfc4 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -5,4 +5,5 @@ include("common.jl")
 @testset "Exploration" begin include("ifsandbuts.jl") end
 @testset "Hessian sparsity" begin include("hessian.jl") end
 @testset "Paraboloid example" begin include("paraboloid.jl") end
+@safetestset "Simple examples" begin include("examples.jl") end
 @safetestset "Global PDE example" begin include("global_PDE.jl") end