Merge pull request #744 from null-a/drift-test

Add regression test for issue 147.
probmods · Jan 3, 2017 · 96c8791 · 96c8791
2 parents e81328b + a5f26e8
commit 96c8791
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diff --git a/tests/test-data/stochastic/expected/funnyDrift.json b/tests/test-data/stochastic/expected/funnyDrift.json
@@ -0,0 +1,6 @@
+{
+  "hist": {
+    "true": 0.5,
+    "false": 0.5
+  }
+}
diff --git a/tests/test-data/stochastic/models/funnyDrift.wppl b/tests/test-data/stochastic/models/funnyDrift.wppl
@@ -0,0 +1,11 @@
+// Test for the problem described in issue 147.
+var model = function() {
+  if (flip()) {
+    sample(Gaussian({mu: 0, sigma: 2}), {
+      driftKernel(prevVal) { return Gaussian({mu: 100, sigma: 1}); }
+    });
+    return true;
+  } else {
+    return false;
+  }
+};
diff --git a/tests/test-inference.js b/tests/test-inference.js
@@ -359,6 +359,7 @@ var tests = [
         std: { tol: 0.4 },
         args: { samples: 200000, burn: 1 }
       },
+      funnyDrift: true,
       withCaching: true,
       variableSupport: true,
       query: true,