context("Testing SelfTraining")
source("wine.R")
require(caret)
test_that(
desc = "selfTraining works",
code = {
m <- selfTraining(x = wine$xtrain, y = wine$ytrain, learner = knn3)
expect_is(m, "selfTraining")
p <- predict(m, wine$xitest)
expect_is(p, "factor")
expect_equal(length(p), length(wine$ytrain))
m <- selfTraining(x = wine$dtrain, y = wine$ytrain, x.inst = FALSE,
learner = oneNN)
expect_is(m, "selfTraining")
p <- predict(m, wine$ditest[, m$instances.index])
expect_is(p, "factor")
expect_equal(length(p), length(wine$ytrain))
}
)
test_that(
desc = "prediction not fail when x is a vector",
code = {
m <- selfTraining(x = wine$xtrain, y = wine$ytrain, learner = knn3)
p <- predict(m, wine$xitest[1,])
expect_is(p, "factor")
expect_equal(length(p), 1)
}
)
test_that(
desc = "the model structure is correct",
code = {
m <- selfTraining(x = wine$xtrain, y = wine$ytrain, learner = knn3)
expect_equal(
names(m),
c("model", "instances.index", "classes", "pred", "pred.pars")
)
}
)
test_that(
desc = "x can be a data.frame",
code = {
x = as.data.frame(wine$xtrain)
expect_is(selfTraining(x, y = wine$ytrain, learner = knn3),
"selfTraining")
}
)
test_that(
desc = "y can be a vector",
code = {
y = as.vector(wine$ytrain)
expect_is(selfTraining(x = wine$xtrain, y, learner = knn3),
"selfTraining")
}
)
test_that(
desc = "x.inst can be coerced to logical",
code = {
expect_is(
selfTraining(x.inst = TRUE, x = wine$xtrain, y = wine$ytrain, learner = knn3),
"selfTraining"
)
expect_is(
selfTraining(x.inst = 1, x = wine$xtrain, y = wine$ytrain, learner = knn3),
"selfTraining"
)
expect_error(
selfTraining(x.inst = "t", x = wine$xtrain, y = wine$ytrain, learner = knn3)
)
}
)
test_that(
desc = "relation between x and y is correct",
code = {
expect_error(selfTraining(x = wine$xtrain, y = wine$ytrain[-1], learner = knn3))
expect_error(selfTraining(x = wine$xtrain[-1,], y = wine$ytrain, learner = knn3))
}
)
test_that(
desc = "y has some labeled instances",
code = {
expect_error(
selfTraining(x = wine$xtrain, y = rep(NA, length(wine$ytrain)), learner = knn3)
)
}
)
test_that(
desc = "y has some unlabeled instances",
code = {
expect_error(
selfTraining(x = wine$xtrain, y = rep(1, length(wine$ytrain)), learner = knn3)
)
}
)
test_that(
desc = "x is a square matrix when x.inst is FALSE",
code = {
expect_error(
selfTraining(x = wine$dtrain[-1,], y = wine$ytrain, x.inst = FALSE, learner = knn3)
)
expect_is(
selfTraining(x = wine$dtrain, y = wine$ytrain, x.inst = FALSE, learner = knn3),
"selfTraining"
)
}
)
test_that(
desc = "max.iter is a value greather than 0",
code = {
expect_error(
selfTraining(x = wine$xtrain, y = wine$ytrain, learner = knn3, max.iter = -1)
)
expect_error(
selfTraining(x = wine$xtrain, y = wine$ytrain, learner = knn3, max.iter = 0)
)
expect_is(
selfTraining(x = wine$xtrain, y = wine$ytrain, learner = knn3, max.iter = 80),
"selfTraining"
)
}
)
test_that(
desc = "perc.full is a value between 0 and 1",
code = {
expect_error(
selfTraining(x = wine$xtrain, y = wine$ytrain, learner = knn3, perc.full = -0.5)
)
expect_error(
selfTraining(x = wine$xtrain, y = wine$ytrain, learner = knn3, perc.full = 1.5)
)
expect_is(
selfTraining(x = wine$xtrain, y = wine$ytrain, learner = knn3, perc.full = 0.8),
"selfTraining"
)
}
)
test_that(
desc = "thr.conf is a value between 0 and 1",
code = {
expect_error(
selfTraining(x = wine$xtrain, y = wine$ytrain, learner = knn3, thr.conf = -0.5)
)
expect_error(
selfTraining(x = wine$xtrain, y = wine$ytrain, learner = knn3, thr.conf = 1.5)
)
expect_is(
selfTraining(x = wine$xtrain, y = wine$ytrain, learner = knn3, thr.conf = 0.8),
"selfTraining"
)
}
)
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