[GitHub] anirudhacharya commented on a change in pull request #12360: [MXNET-690] Add tests for initializers in R

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anirudhacharya commented on a change in pull request #12360: [MXNET-690] Add tests for initializers in R
URL: https://github.com/apache/incubator-mxnet/pull/12360#discussion_r213160623
 
 

 ##########
 File path: R-package/tests/testthat/test_initializer.R
 ##########
 @@ -0,0 +1,121 @@
+require(mxnet)
+
+context("initializer")
+
+testthat("mx.init.uniform", {
+  uniform_init = mx.init.uniform(scale = 1)
+  expect_equal(typeof(uniform_init), 'closure')
+
+  X_bias <- uniform_init('X_bias', c(1, 10000), ctx = mx.ctx.default())
+  expect_equal(X_bias, mx.nd.zeros(c(1, 10000)))
+
+  X_weight <- uniform_init('X_weight', c(5, 10, 10000), ctx = mx.ctx.default())
+  expect_equal(X_weight >= -1, mx.nd.ones(c(5, 10, 10000)))
+  expect_equal(X_weight <= 1, mx.nd.ones(c(5, 10, 10000)))
+  mean_weight <- mean(as.array(X_weight))
+  expect_equal(mean_weight, 0, tolerance=1e-2)
+})
+
+testthat("mx.init.normal", {
+  normal_init = mx.init.normal(sd = 0.1)
+  expect_equal(typeof(normal_init), 'closure')
+
+  X_bias <- normal_init('X_bias', c(1, 10000), ctx = mx.ctx.default())
+  expect_equal(X_bias, mx.nd.zeros(c(1, 10000)))
+  
+  X_weight <- normal_init('X_weight', c(5, 10, 10000), ctx = mx.ctx.default())
+  weight_mean <- mean(as.array(X_weight))
+  weight_sd <- sd(as.array(X_weight))
+  expect_equal(weight_mean, 0, tolerance=1e-2)
+  expect_equal(weight_sd, 0.1, tolerance=1e-2)
+})
+
+testthat("mx.init.Xavier", {
+  xavier_init <- mx.init.Xavier()
+  expect_equal(typeof(xavier_init), 'closure')
+
+  # default parameters
+  shape <- c(2, 3, 324, 324)
 
 Review comment:
   no particular reason, I just did not want to pick a number too low that the test becomes flaky or too high that the test takes very long to execute. It was quite random

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